MCI WORLDCOM INC
10-Q, 1998-11-16
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>   1
z

- -------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 10-Q


            [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                For the quarterly period ended September 30, 1998

                                       OR

            [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

               For the transition period from ________ to ________

                         Commission file number: 0-11258

                         -------------------------------

                               MCI WORLDCOM, INC.
             (Exact name of registrant as specified in its charter)

                         -------------------------------

           Georgia                                       58-1521612
(State or other jurisdiction of
 incorporation or organization)            (I.R.S. Employer  Identification No.)

515 East Amite Street, Jackson, Mississippi                      39201-2702
 (Address of principal executive offices)                        (Zip Code)

       Registrant's telephone number, including area code : (601) 360-8600

                                 WORLDCOM, INC.
                   -------------------------------------------
                   (Former Name, if changed since last report)

         Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes  X    No
                                              ---      ---


         The number of outstanding shares of the registrant's Common Stock, par
value $.01 per share, was 1,833,425,800 on October 31, 1998.

- -------------------------------------------------------------------------------



<PAGE>   2


                          QUARTERLY REPORT ON FORM 10-Q
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                        Page
                                                                                                       Number
                                                                                                       ------
<S>                                                                                                       <C>
         PART I.               FINANCIAL INFORMATION

                 Item 1.        Financial Statements

                                Consolidated Balance Sheets as of
                                September 30, 1998 and December 31, 1997.............................      3

                                Consolidated Statements of Operations
                                for the three and nine months ended September 30, 1998
                                and September 30, 1997...............................................      4

                                Consolidated Statements of Cash Flows for
                                the nine months ended  September 30, 1998 and
                                September 30, 1997...................................................      5

                                Notes to Consolidated Financial Statements...........................      6

                 Item 2.        Management's Discussion and Analysis of
                                Financial Condition and Results of Operations........................     23

                 Item 3.        Quantitative and Qualitative Disclosure About Market Risk............     33

         PART II.               OTHER INFORMATION

                 Item 1.        Legal Proceedings....................................................     34

                 Item 2.        Changes in Securities and Use of Proceeds............................     34

                 Item 3.        Defaults Upon Senior Securities......................................     34

                 Item 4.        Submission of Matters to a Vote
                                of Securities Holders................................................     34

                 Item 5.        Other Information....................................................     34

                 Item 6.        Exhibits and Reports on Form 8-K.....................................     34

         Signature              .....................................................................     36

         Exhibit Index          .....................................................................     37
</TABLE>

                                     Page 2

<PAGE>   3



PART I. FINANCIAL INFORMATION
 Item 1. Financial Statements

                       MCI WORLDCOM, INC. AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEETS
             (Unaudited. In Millions of Dollars, Except Share Data)

<TABLE>
<CAPTION>
                                                                    September 30,    December 31,
                                                                        1998             1997
                                                                   --------------   -------------- 
<S>                                                                <C>              <C>           
ASSETS
Current assets:
  Cash and cash equivalents                                        $          944   $          155
  Marketable securities                                                        --               54
  Accounts receivable, net of allowance for bad debts of $861 in 1998
    and $203 in 1997                                                        6,057            1,241
  Income taxes receivable                                                     190                5
  Deferred tax asset                                                          476                -
  Other current assets                                                        993              419
                                                                   --------------   -------------- 
         Total current assets                                               8,660            1,874
                                                                   --------------   -------------- 
Property and equipment:
  Transmission equipment                                                   10,388            3,688
  Communications equipment                                                  4,459            2,493
  Furniture, fixtures and other                                             5,167              920
  Construction in progress                                                  3,763              468
                                                                   --------------   -------------- 
                                                                           23,777            7,569
  Less - accumulated depreciation                                          (1,477)            (855)
                                                                   --------------   -------------- 
                                                                           22,300            6,714
                                                                   --------------   -------------- 
Goodwill and other intangible assets                                       46,908           13,882
Deferred tax asset                                                             --              405
Other assets                                                                4,410              721
                                                                   --------------   -------------- 
                                                                   $       82,278   $       23,596
                                                                   ==============   ============== 
LIABILITIES AND SHAREHOLDERS' INVESTMENT
Current liabilities:
  Short-term debt and current maturities of long-term debt         $        4,242   $           11
  Accounts payable                                                          1,911              470
  Accrued line costs                                                        3,809              868
  Accrued interest                                                            307              119
  Deferred tax liability                                                       --               60
  Other current liabilities                                                 3,874              546
                                                                   --------------   -------------- 
         Total current liabilities                                         14,143            2,074
                                                                   --------------   -------------- 
Long-term liabilities, less current portion:
  Long-term debt                                                           16,032            7,413
  Deferred tax liability                                                    1,855               --
  Other liabilities                                                         1,901              308
                                                                   --------------   -------------- 
         Total long-term liabilities                                       19,788            7,721
                                                                   --------------   -------------- 
Commitments and contingencies

Minority interests                                                          3,333               --

Company obligated manditorily redeemable preferred
  securities of subsidiary trust holding solely junior
  subordinated deferrable interest debentures                                 750               --

Shareholders' investment:
  Series A preferred stock, par value $.01 per share;
    authorized, issued and outstanding: none in 1998 and
    94,992 shares in 1997 (variable liquidation preference)                    --               --
  Series B preferred stock, par value $.01 per share;
    authorized, issued and outstanding: 11,777,262 shares in
    1998 and 12,421,858 shares in 1997 (liquidation preference
    of $1.00 per share plus unpaid dividends)                                  --               --
  Preferred stock, par value $.01 per share; authorized:
    34,905,008 shares in 1998 and 1997; none issued                            --               --
  Common stock, par value $.01 per share; authorized:
    2,500,000,000 shares; issued and outstanding:
    1,829,895,614 shares in 1998 and 981,615,661 shares in 1997                18               10
  Additional paid-in capital                                               49,314           15,531
  Retained earnings (deficit)                                              (4,915)          (1,774)
  Unrealized holding gain on marketable equity securities                      32               34
  Treasury stock, at cost, 4,510,211 shares in 1998 and none in 1997         (185)              --
                                                                   --------------   -------------- 
        Total shareholders' investment                                     44,264           13,801
                                                                   --------------   -------------- 
                                                                   $       82,278   $       23,596
                                                                   ==============   ============== 
</TABLE>

The accompanying notes are an integral part of these statements.

                           Page 3

<PAGE>   4


             MCI WORLDCOM, INC. AND SUBSIDIARIES
            CONSOLIDATED STATEMENTS OF OPERATIONS
 (Unaudited. In Millions of Dollars, Except Per Share Data)


<TABLE>
<CAPTION>
                                                                     For the Three Months                For the Nine Months
                                                                      Ended September 30,                Ended September 30,
                                                                  -----------------------------      ----------------------------
                                                                        1998           1997               1998           1997
                                                                  -------------   -------------      -------------  -------------

<S>                                                               <C>             <C>                <C>            <C>         
        Revenues                                                  $       3,758   $       1,911       $      8,661  $       5,364
                                                                  -------------   -------------      -------------  -------------

        Operating expenses:
          Line costs                                                      1,792             965              4,141          2,783
          Selling, general and administrative                               902             411              1,904          1,200
          Depreciation and amortization                                     469             247              1,099            719
          In-process research and development and other charges           3,227             --               3,725             --
                                                                  -------------   -------------      -------------  -------------
                Total                                                     6,390           1,623             10,869          4,702
                                                                  -------------   -------------      -------------  -------------
        Operating income (loss)                                          (2,632)            288             (2,208)           662
        Other income (expense):
          Interest expense                                                 (141)           (102)              (351)          (289)
          Miscellaneous                                                      14              12                 36             33
                                                                  -------------   -------------      -------------  -------------
        Income (loss) before income taxes, minority interests
         and extraordinary items                                         (2,759)            198             (2,523)           406
        Provision for income taxes                                          174             122                462            261
                                                                  -------------   -------------      -------------  -------------
        Income (loss) before minority interests and extraordinary
         items                                                           (2,933)             76             (2,985)           145
        Minority interests                                                   11             --                  11             --
                                                                  -------------   -------------      -------------  -------------
        Net income (loss) before extraordinary items                     (2,944)             76             (2,996)           145
        Extraordinary item (net of income taxes of $78 in 1998
         and $0 in 1997)                                                     --             --                (129)            (3)
        Distributions on subsidiary trust mandatorily redeemable
         preferred securities                                                 3             --                   3             --
        Preferred dividend requirement                                       --               7                 13             20
                                                                  -------------   -------------      -------------  -------------
        Net income (loss) applicable to common shareholders       $      (2,947)  $          69      $      (3,141) $         122
                                                                  =============   =============      =============  =============

        Earnings (loss) per common share:
          Net income (loss) applicable to common shareholders
           before extraordinary items:
              Basic                                               $       (2.44)  $        0.07      $       (2.77) $        0.13
                                                                  =============   =============      =============  =============
              Diluted                                             $       (2.44)  $        0.07      $       (2.77) $        0.13
                                                                  =============   =============      =============  =============

          Extraordinary item                                      $          --   $         --       $       (0.12) $       (0.00)
                                                                  =============   =============      =============  =============

          Net income (loss) applicable to common shareholders :
              Basic                                               $       (2.44)  $        0.07      $       (2.89) $        0.13
                                                                  =============   =============      =============  =============
              Diluted                                             $       (2.44)  $        0.07      $       (2.89) $        0.12
                                                                  =============   =============      =============  =============
</TABLE>


        The accompanying notes are an integral part of these statements.



                                     Page 4

<PAGE>   5





             MCI WORLDCOM, INC. AND SUBSIDIARIES
            CONSOLIDATED STATEMENTS OF CASH FLOWS
             (Unaudited. In Millions of Dollars)



<TABLE>
<CAPTION>
                                                                                        For the Nine Months
                                                                                        Ended September 30,
                                                                                ----------------------------------- 
                                                                                       1998                1997
                                                                                ---------------     --------------- 
<S>                                                                             <C>                 <C>            
          Cash flows from operating activities:
          Net income (loss)                                                     $        (3,125)    $           142
          Adjustments to reconcile net income (loss) to net cash
            provided by operating activities:
              Extraordinary item                                                            129                   3
              In-process research and development and other charges                       3,725                  --
              Depreciation and amortization                                               1,099                 719
              Provision for losses on accounts receivable                                   115                  77
              Provision for deferred income taxes                                           451                 224
              Accreted interest on debt                                                      25                 114
              Change in assets and liabilities, net of effect of
                business combinations:
                  Accounts receivable                                                      (753)               (266)
                  Income taxes, net                                                           8                  28
                  Other current assets                                                     (147)               (115)
                  Accrued line costs                                                       (397)                 22
                  Accounts payable and other current liabilities                            383                   3
              Other                                                                         (34)                 (7)
                                                                                ---------------     --------------- 
          Net cash provided by operating activities                                       1,479                 944
                                                                                ---------------     --------------- 
          Cash flows from investing activities:
            Capital expenditures                                                         (3,267)             (2,216)
            Sale of short-term investments, net                                              53                 839
            Acquisitions and related costs                                               (3,049)               (494)
            Increase in intangible assets                                                   (96)                (98)
            Proceeds from disposition of long-term assets                                   146                  70
            Increase in other assets                                                       (270)               (177)
            Decrease in other liabilities                                                  (305)                (25)
                                                                                ---------------     --------------- 
          Net cash used in investing activities                                          (6,788)             (2,101)
                                                                                ---------------     --------------- 
          Cash flows from financing activities:
            Principal borrowings on debt, net                                             5,833                 716
            Common stock issuance                                                           281                 147
            Dividends paid on preferred stock                                               (13)                (20)
            Distributions on subsidiary trust mandatorily redeemable preferred securities    (3)                 --
            Other                                                                            --                   6
                                                                                ---------------     --------------- 
          Net cash provided by financing activities                                       6,098                 849
                                                                                ---------------     --------------- 

          Net increase (decrease) in cash and cash equivalents                              789                (308)
          Cash and cash equivalents at beginning of period                                  155                 485
                                                                                ---------------     --------------- 
          Cash and cash equivalents at end of period                            $           944     $           177
                                                                                ===============     =============== 
</TABLE>

The accompanying notes are an integral part of these statements.


                                     Page 5

<PAGE>   6




             MCI WORLDCOM, INC. AND SUBSIDIARIES

         NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(A) GENERAL

References herein to the "Company" or "MCI WorldCom" refer to MCI WORLDCOM,
Inc., a Georgia corporation, and its subsidiaries, which prior to September 15,
1998, was named WorldCom, Inc. ("WorldCom").

The financial statements included herein, are unaudited and have been prepared
in accordance with generally accepted accounting principles for interim
financial reporting and Securities and Exchange Commission rules and
regulations. Certain information and footnote disclosures normally included in
financial statements prepared in accordance with generally accepted accounting
principles have been condensed or omitted pursuant to such rules and
regulations. In the opinion of management, the financial statements reflect all
adjustments (of a normal and recurring nature) which are necessary to present
fairly the financial position, results of operations and cash flows for the
interim periods. These financial statements should be read in conjunction with
the Company's restated financial statements contained in its Current Report on
Form 8-K dated May 28, 1998 (filed May 28, 1998). The results for the nine month
period ended September 30, 1998 are not necessarily indicative of the results
that may be expected for the year ending December 31, 1998.

(B) BUSINESS COMBINATIONS

On September 14, 1998, the Company acquired MCI Communications Corporation, a
Delaware corporation ("MCI"), pursuant to the merger (the "MCI Merger") of MCI
with and into TC Investments Corp. ("Acquisition Subsidiary"), a wholly owned
subsidiary of the Company. Upon consummation of the MCI Merger, Acquisition
Subsidiary was renamed MCI Communications Corporation. Through the MCI Merger,
the Company acquired one of the world's largest and most advanced digital
networks, connecting local markets in the United States to more than 280
countries and locations worldwide.

As a result of the MCI Merger, each outstanding share of MCI common stock was
converted into the right to receive 1.2439 shares of MCI WorldCom common stock,
par value $.01 per share (the "Common Stock" or "MCI WorldCom Common Stock") or
approximately 755 million MCI WorldCom common shares in the aggregate, and each
share of MCI Class A common stock outstanding (all of which were held by British
Telecommunications plc ("BT")) was converted into the right to receive $51.00 in
cash or approximately $7 billion in the aggregate. The funds paid to BT were
obtained by the Company from (i) available cash as a result of the Company's
$6.1 billion public debt offering in August 1998 (See Note F); (ii) the sale of
MCI's Internet backbone facilities and wholesale and retail Internet business
(the "iMCI Business") to Cable and Wireless plc ("Cable & Wireless") for $1.75
billion in cash on September 14, 1998; (iii) the sale of MCI's 24.9% equity
stake in Concert Communications Services ("Concert") to BT for $1 billion in
cash on September 14, 1998; and (iv) availability under the Company's commercial
paper program and credit facilities (See Note F).

Upon effectiveness of the MCI Merger, the then outstanding and unexercised
options exercisable for shares of MCI common stock were converted into options
exercisable for an aggregate of approximately 83 million shares of MCI WorldCom
Common Stock having the same terms and conditions as the MCI options, except
that the exercise price and the number of shares issuable upon exercise were
divided and multiplied, respectively, by 1.2439. The MCI Merger was accounted
for as a purchase; accordingly, operating results for MCI have been included
from the date of acquisition (See Note E).

On August 4, 1998, MCI acquired a 51.79% voting interest and a 19.26% economic
interest in Embratel Participacoes S.A., ("Embratel"), Brazil's only
facilities-based national communications provider, for approximately $2.3
billion. The purchase price will be paid in local currency installments, of
which $916 million was paid on August 4, 1998 with the remainder to be paid in
two equal installments over the next two years. Embratel provides interstate
long distance and international telecommunications services in Brazil, as well
as over 40 other communications services, including leased high-speed data,
satellite, Internet, frame and packet-switched services. Operating results for
Embratel are consolidated in the accompanying consolidated financial statements
and are included from the date of the MCI Merger.

                                     Page 6

<PAGE>   7

On January 31, 1998, the Company acquired CompuServe Corporation, a Delaware
corporation ("CompuServe"), pursuant to the merger (the "CompuServe Merger") of
a wholly owned subsidiary of the Company with and into CompuServe. Upon
consummation of the CompuServe Merger, CompuServe became a wholly owned
subsidiary of MCI WorldCom.

As a result of the CompuServe Merger, each share of CompuServe common stock was
converted into the right to receive 0.40625 shares of MCI WorldCom Common Stock,
or approximately 37.6 million MCI WorldCom common shares in the aggregate. Prior
to the CompuServe Merger, CompuServe operated primarily through two divisions:
Interactive Services and Network Services. Interactive Services offered
worldwide online and Internet access services for consumers, while Network
Services provided worldwide network access, management and applications, and
Internet service to businesses. The CompuServe Merger was accounted for as a
purchase; accordingly, operating results for CompuServe have been included from
the date of acquisition.

On January 31, 1998, the Company also acquired ANS Communications, Inc., a
Delaware corporation ("ANS"), from America Online, Inc. ("AOL") and has entered
into five year contracts with AOL under which MCI WorldCom and its subsidiaries
provide network services to AOL (collectively, the "AOL Transaction"). As part
of the AOL Transaction, AOL acquired CompuServe's Interactive Services division
and received a $175 million cash payment from MCI WorldCom. MCI WorldCom
retained the CompuServe Network Services ("CNS") division. ANS provides Internet
access to AOL and AOL's subscribers in the United States, Canada, the United
Kingdom, Sweden and Japan, and also designs, develops and operates high
performance wide-area networks for business, research, education and
governmental organizations. The AOL Transaction was accounted for as a purchase;
accordingly, operating results for ANS have been included from the date of
acquisition.

On January 29, 1998, MCI WorldCom acquired Brooks Fiber Properties, Inc., a
Delaware corporation ("BFP"), pursuant to the merger (the "BFP Merger") of a
wholly owned subsidiary of MCI WorldCom with and into BFP. Upon consummation of
the BFP Merger, BFP became a wholly owned subsidiary of MCI WorldCom. BFP is a
leading facilities-based provider of competitive local telecommunications
services, commonly referred to as a competitive local exchange carrier, in
selected cities within the United States. BFP acquires and constructs its own
state-of-the-art fiber optic networks and facilities and leases network capacity
from others to provide long distance carriers ("IXCs"), Internet Service
Providers ("ISPs"), wireless carriers and business, government and institutional
end users with an alternative to the incumbent local exchange carriers ("ILECs")
for a broad array of high quality voice, data, video transport and other
telecommunications services.

As a result of the BFP Merger, each share of BFP common stock was converted into
the right to receive 1.85 shares of Common Stock or approximately 72.6 million
MCI WorldCom common shares in the aggregate. The BFP Merger was accounted for as
a pooling-of-interests and, accordingly, the Company's financial statements for
periods prior to the BFP Merger have been restated to include the results of BFP
for all periods presented.

The following unaudited pro forma combined results of operations for the Company
assumes that the MCI Merger was completed on January 1, 1997 (in millions,
except per share data):

<TABLE>
<CAPTION>
                                                                                 For the Nine Months
                                                                                 Ended September 30,
                                                                             ---------------------------
                                                                                1998              1997
                                                                             ---------         ---------
<S>                                                                          <C>               <C>      
                      Revenues                                               $  22,950         $  18,971
                      Income (loss) before extraordinary items                  (2,870)              (19)
                      Net income (loss)                                         (2,999)              (22)
                      Dilutive income (loss) per common share:
                        Income (loss) before extraordinary items                 (1.61)            (0.01)
                        Net income (loss)                                        (1.69)            (0.01)
</TABLE>

These pro forma amounts represent the historical operating results of MCI
combined with those of the Company with appropriate preliminary adjustments
which give effect to depreciation, amortization, interest and the common shares
issued. These pro forma amounts also do not include amounts with respect to the
CompuServe Merger, AOL Transaction or Embratel prior to their respective
business combination dates because they are individually, and in the aggregate,
not material to MCI WorldCom. These pro forma amounts are not necessarily
indicative of operating results which would have

                                     Page 7

<PAGE>   8

occurred if MCI had been operated by current management during the periods
presented because these amounts do not reflect cost savings related to full
network optimization and the redundant effect on operating, selling, general and
administrative expenses.

(C) EARNINGS PER SHARE

Earnings per share are calculated in accordance with Statement of Financial
Accounting Standards ("SFAS") No. 128 "Earnings Per Share." The following is a
reconciliation of the numerators and the denominators of the basic and diluted
per share computations (in millions, except per share data):

<TABLE>
<CAPTION>
                                                                   For the Three Months           For the Nine Months
                                                                    Ended September 30,           Ended September 30,
                                                                 -------------------------     --------------------------
                                                                     1998         1997            1998           1997
                                                                 ---------    ------------     ----------    ------------
<S>                                                              <C>          <C>              <C>           <C>         
Basic
Net income (loss) before extraordinary items                     $  (2,944)   $         76     $   (2,996)   $        145
Preferred stock dividends and distributions                              3               7             16              20
                                                                 ---------    ------------     ----------    ------------
Net income (loss) applicable to common shareholders
  before extraordinary items                                     $  (2,947)   $         69     $   (3,012)   $        125
                                                                 =========    ============     ==========    ============
Weighted average shares outstanding                                  1,209             974          1,088             961
                                                                 =========    ============     ==========    ============
Basic earnings (loss) per share                                 $    (2.44)    $      0.07    $     (2.77)   $       0.13
                                                                 =========    ============     ==========    ============

Diluted
Net income (loss) applicable to common shareholders
  before extraordinary items                                     $  (2,947)   $         69     $   (3,012)   $        125
Add back:
  Preferred stock dividends and distributions                           --               7             --               1
                                                                 ---------    ------------     ----------    ------------
Net income (loss) applicable to common shareholders
  before extraordinary items                                     $  (2,947)   $         76    $    (3,012)    $       126
                                                                 =========    ============     ==========    ============

Weighted average shares outstanding                                  1,209             974          1,088             961
Common stock equivalents                                                --              33             --              31
Common stock issuable upon conversion of preferred stock                --              34             --               1
                                                                 ---------    ------------     ----------    ------------
Diluted shares outstanding                                           1,209           1,041          1,088             993
                                                                 =========    ============     ==========    ============
Diluted earnings (loss) per share                                $   (2.44)   $       0.07     $    (2.77)   $       0.13
                                                                 =========    ============     ==========    ============
</TABLE>

(D) SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION

Interest paid by the Company during the nine months ended September 30, 1998 and
1997 amounted to $422.5 million and $136.5 million, respectively. Income taxes
paid during the nine months ended September 30, 1998 and 1997 were $24.3 million
and $12.0 million, respectively. In conjunction with business combinations
during the nine months ended September 30, 1998 and 1997, assumed assets and
liabilities were as follows (in millions):

<TABLE>
<CAPTION>
                                                                                  For the Nine Months
                                                                                  Ended September 30,
                                                                              ---------------------------
                                                                                1998               1997
                                                                              ---------         ---------
<S>                                                                           <C>               <C>      
                 Fair value of assets acquired                                $  21,590         $      64
                 Excess of cost over net tangible assets acquired                36,866               367
                 Liabilities paid (assumed)                                     (22,147)              216
                 Common stock issued                                            (33,260)             (153)
                                                                              ---------         ---------
                                                                              $   3,049         $     494
                                                                              =========         =========
</TABLE>

                                     Page 8

<PAGE>   9

(E) IN-PROCESS RESEARCH AND DEVELOPMENT AND OTHER CHARGES

In the first quarter of 1998, the Company recorded a pre-tax charge of $69
million for employee severance, alignment charges and direct merger costs
associated with the BFP Merger. Additionally, in the third quarter of 1998, the
Company recorded a pre-tax charge of $127 million primarily in connection with
the MCI Merger. The third quarter charge included severance costs associated
with the termination of certain employees which is expected to be completed by
the first quarter of 1999. Also included are alignment charges, and other exit
activities which include the costs of consolidating and closing facilities, loss
on sale or write down of assets and conformance of accounting principles. The
Company anticipates completing its plans for alignment and exit activities by
the end of the first quarter of 1999. The following table reflects the
components of the significant items included as other charges in the
accompanying consolidated statements of operations for the nine months ended
September 30, 1998 (in millions):

           BFP direct merger costs                               $   17
           Severance                                                 21
           Alignment and other exit activities                      158
                                                                 ------
                                                                 $  196
                                                                 ======

In connection with the above charges, $43 million, $18 million and $16 million
are included in other current liabilities, accrued line costs and other
liabilities, respectively, in the accompanying consolidated financial statements
as of September 30, 1998. The amount included in other current liabilities also
includes $8 million for severance as of September 30, 1998.

In connection with recent business combinations, the Company made allocations of
the purchase price to acquired in-process research and development ("R&D")
totaling $429 million in the first quarter of 1998 related to the CompuServe
Merger and AOL Transaction and $3.1 billion in the third quarter of 1998 related
to the MCI Merger.

The Company used professional appraisal consultants to assess and allocate
values to the in-process research and development. These allocations represent
the estimated fair value based on risk-adjusted future cash flows related to the
incomplete projects. At the date of the respective business combinations, the
development of these projects had not yet reached technological feasibility and
the R&D in progress had no alternative future uses. Accordingly, these costs
were expensed as of the respective acquisition dates.

Discounting the net cash flows back to their present value is based on the
weighted average cost of capital ("WACC"). The respective business enterprises
are comprised of various types of assets, each possessing different degrees of
investment risk contributing to the Company's overall WACC. Intangible assets
are assessed higher risk factors due to their lack of liquidity and poor
versatility for redeployment elsewhere in the business. In the MCI analysis,
CompuServe analysis and ANS analysis the implied WACC was 14%, 14.5% and 16.5%,
respectively, based on the purchase price paid, assumed liabilities, projected
cash flows, and each company's asset mix. Returns on monetary and fixed assets
were estimated based on prevailing interest rates. The process for quantifying
intangible asset investment risk involved consideration of the uncertainty
associated with realizing discernible cash flows over the life of the asset. A
discount range of 15.5% to 19% was used for valuing the in-process research and
development. These discount rates are higher than the WACC due to the inherent
uncertainties surrounding the successful development of the purchased in-process
research and development, the useful life of such technology, the profitability
levels of such technology, and the uncertainty of technological advances that
are unknown at this time.

The value of the in-process research and development projects was adjusted to
reflect the relative value and contribution of the acquired R&D. In doing so,
consideration was given to the R&D's stage of completion, the complexity of the
work completed to date, the difficulty of completing the remaining development,
costs already incurred and the projected cost to complete the projects.

The Company believes that the assumptions used in the forecasts were reasonable
at the time of the respective business combination. No assurance can be given,
however, that the underlying assumptions used to estimate expected project
sales, development costs or profitability, or the events associated with such
projects, will transpire as estimated. For these reasons, actual results may
vary from the projected results.

                                     Page 9

<PAGE>   10

Management expects to continue supporting these R&D efforts and believes the
Company has a reasonable chance of successfully completing the R&D programs.
However, there is risk associated with the completion of the R&D projects and
the Company cannot be assured that any will meet with either technological or
commercial success.

If none of these R&D projects is successfully developed, the sales and
profitability of the Company may be adversely affected in future periods. The
failure of any particular individual project in-process would not materially
impact the Company's financial condition, results of operations or the
attractiveness of the overall investment in MCI, CompuServe or ANS. Operating
results are subject to uncertain market events and risks, which are beyond the
Company's control, such as trends in technology, government regulations, market
size and growth, and product introduction or other actions by competitors.

The integration and consolidation of MCI, CompuServe and ANS requires
substantial management and financial resources. While the Company believes the
early results of these efforts are encouraging, the MCI Merger, CompuServe
Merger and AOL Transaction necessarily involve a number of significant risks,
including potential difficulties in assimilating the technologies and services
of these companies and in achieving the expected synergies and cost reduction.

A description of the acquired in-process technology and the estimates made by
the Company for each business combination is set forth below.

MCI

The in-process technology acquired in the MCI Merger consisted of seventy
significant R&D projects grouped into six categories. The aggregate value
assigned to MCI in-process research and development was $3.1 billion. These
projects were all targeted at: (1) developing and deploying an all optical
network, new architecture of the telephone system using Internet Protocol ("IP")
and developing the systems and tools necessary to manage the voice and data
traffic; (2) creating new products and services; and (3) developing certain
information systems that may enhance the management of MCI WorldCom's products
and service offerings.

A brief description of the six categories of in-process research and development
projects purchased in connection with the MCI Merger is set forth below:

o    R&D Related to an All Optical Network. These projects involve R&D related
     to the development of an all optical network. This structure is in contrast
     to current systems which employ a combination of optics and electronics.
     New technologies that are in development include: (a) an optical cross
     connect system for all optical packet transport and sub-second service
     restoration, (b) a wavelength channel plan for enabling multiple
     simultaneous transmission channels, (c) projects related to distortion
     elimination, and (d) next generation optical networking technologies
     related to the fiber infrastructure. Achievements to date include
     demonstration of limited-scope prototypes in the laboratory. Remaining
     efforts include: demonstration of the system on a large scale with
     commercial traffic, physics research in certain areas, development of
     algorithms to enable network management, and addressing technology issues
     related to switching. The amount of R&D costs to date for these projects
     total $7 million. Estimated costs to complete are $10 million, as follows:
     15% during the last quarter of 1998, 48% during the four quarters in 1999,
     31% during the four quarters in 2000, and 6% during the four quarters in
     2001. The completion of these projects will be difficult, and the risk of
     these technologies not being completed is rated as medium to high. Failure
     to complete the R&D would cause the Company's future revenues and profits
     attributable to the R&D not to materialize as these projects would
     contribute to differentiating the Company from the competition in the
     future.

                                    Page 10

<PAGE>   11

o    R&D Related to Data Transmission Service / Other Transmission Efforts. The
     Company is currently working on a variety of significant efforts related to
     data management. These new technologies include: (a) new data services to
     satisfy new capacity requirements and Internet needs, (b) a next generation
     intelligent network to enable deployment of specific new telecommunications
     services across multiple networks, (c) a 16 wavelength bi-directional line
     amplifier to amplify optical signals, (d) multiservice and integrated
     access platforms and development of new methods for serving ISPs on the
     local services network, and (e) Andromeda, which is related to specific
     improvements to Internet operations. Achievements to date include methods
     for new high speed switching, multicasting, and offering a variety of
     service levels, as well as architectural design for next generation
     intelligent networks. Tasks to complete the new technologies include:
     engineering related to telephone system to utilize IP; solving scalability
     issues across the infrastructure; and conducting extensive testing of the
     technologies under development. To date $48 million has been expended to
     develop these R&D projects. Estimated costs to complete the projects are
     $132 million, as follows: 9% during the last quarter of 1998, 33% during
     the four quarters in 1999, 46% during the four quarters in 2000, and 12%
     during the four quarters in 2001. The completion of these projects will be
     difficult and the risk of not completing these projects can be
     characterized as medium to high. Failure to complete the R&D would cause
     the Company's future revenues and profits attributable to the R&D not to
     materialize.

o    Next Generation Tools. The Company's personnel are developing a variety of
     new tools that are being designed to achieve specific reliability and
     quality objectives related to the network. Important new development
     technologies in this category include: (a) reliability and quality
     engineering tools related to the reliability test and quality control, (b)
     network design development tools to enable end-to-end network design and
     modeling capabilities, (c) the Integrated Management Platform Advanced
     Communications Technology ("IMPACT") project to provide new network
     management for the networks, (d) the integrated test system to provide a
     new testing architecture for the Company's local, long distance, and
     international networks, and (e) an enhanced traffic system and security.
     Progress to date includes: definition of architectural components, partial
     development of software algorithms, and limited prototypes for tasks.
     Remaining efforts include completion of algorithms, prototype development,
     validation, testing, and development of support systems. To date $84
     million has been spent on the R&D projects. Estimated costs to complete are
     $48 million, as follows: 22% during the last quarter of 1998, 46% during
     the four quarters in 1999, 23% during the four quarters in 2000, and 9%
     during the four quarters in 2001. There are significant risks of not being
     able to complete the prototypes and there is also uncertainty in the
     timeliness of completion. The aggregate risk level for this category of R&D
     projects is considered medium to high. Project failure would result in the
     elimination of the Company's future revenues and profits attributable to
     the R&D.

o    Specific New Customer Care Capabilities. These projects involve a series of
     efforts designed to provide customers with a suite of new services. This
     includes development of major technologies such as: (a) the virtual data
     delivery system to engineer new order processing and provisioning
     capabilities for data services, (b) network automation projects related to
     capacity and change management, (c) hyperlink to deploy private lines and
     frame relay circuits utilizing a new methodology, (d) common data platform
     to create a depository of network management information, and (e) the
     Talisman project to develop data products for the network MCI One Voice.
     Achievements to date include design, partial coding, and prototyping. Tasks
     to complete include: addition of significant features and functionality;
     additional design, testing and coding; and addressing scalability issues.
     To date $67 million has been spent on developing this R&D. Estimated costs
     to complete are $76 million, as follows: 20% during the last quarter of
     1998, 50% during the four quarters in 1999, 19% during the four quarters in
     2000, and 11% during the four quarters in 2001. There are significant risks
     in completing the algorithms successfully and on time. The aggregate risk
     level for this category of R&D projects is considered medium to high.
     Project failure would eliminate the Company's future revenues and profits
     attributable to the R&D.

o    R&D Related to Local Services. This category involves a series of specific
     projects to create an offering of local services on a national basis.
     Efforts include: (a) electronic bonding for local service maintenance
     organizations, (b) elements of an order automation and tracking system, (c)
     access technology development, and (d) the substantial R&D related to the
     network optimization enhancement system. Achievements to date include:
     completion of system definitions, partial coding development, and base
     functionality developed on certain projects. Tasks to complete include
     adding features and functionality, module development and testing. To date
     $53 million has been spent on developing the R&D projects. Estimated costs
     to complete are $38 million, as follows: 25% during the last quarter of
     1998, 43% during the four quarters in 1999, 21% during the four quarters in
     2000, and 11% during the four quarters in 2001.

                                    Page 11

<PAGE>   12

     There are significant risks related to developing the interfaces and the
     required technologies and the complex interconnections. The aggregate risk
     level for this category of R&D projects is considered medium to high.
     Failure of the R&D project would eliminate the Company's future revenues
     and profits attributable to the R&D.

o    New Products and Services. A series of new products and services are being
     developed by the Company. These include: (a) video services to design and
     implement a new terrestrial video distribution network for real-time
     quality video, (b) distance learning services via an integrated multimedia
     network platform, (c) fractal compression technology for image compression
     and encoding to reduce data transmit time and bit losses, and (d)
     integrated messaging for one number service for telephone, fax, voicemail,
     Internet, and paging. Progress to date includes: definition, development,
     and component testing; feasibility and analysis; and development of
     prototypes. Remaining development includes: design and deployment;
     resolving issues related to product functionality; and addressing
     scalability issues across the Company's infrastructure. To date $37 million
     has been spent on developing the R&D in this category. Estimated costs to
     complete are $38 million, as follows: 24% during the last quarter of 1998,
     43% during the four quarters in 1999, 22% during the four quarters in 2000,
     and 11% during the four quarters in 2001. There are significant risks in
     completing the R&D projects, particularly developing the leading edge
     components, compression technologies, and developing operational support
     systems. The aggregate risk level for this category of R&D projects is
     considered medium to high. Project failure would eliminate the Company's
     future revenues and profits attributable to the R&D.

A summary of allocated values by technology/project is as follows (in millions):

<TABLE>
<CAPTION>
                                                             Developed         In-Process
                                                             Technology            R&D
                                                             -----------       -----------
<S>                                                          <C>               <C>        
          All Optical Network                                $       200       $       400
          Data Transmission Service/Other                            200               300
          Next Generation Tools                                      100               400
          New Customer Care Capabilities                             800             1,100
          Local                                                      200               700
          New Products and Services                                  200               200
                                                             -----------       -----------
                                                             $     1,700       $     3,100
                                                             ===========       ===========
</TABLE>

The value assigned to purchased in-process technology was determined by
estimating the contribution of the purchased in-process technology to developing
commercially viable products, estimating the resulting net cash flows from the
expected product sales of such products, and discounting the net cash flows to
their present value using a risk-adjusted discount rate. Royalty rates used in
the valuation of in-process R&D ranged from 1% to 3%. Funding for such projects
is expected to be obtained from internally generated sources.

Developed technology will be depreciated over 10 years on a straight-line basis.
The remaining purchase price included allocations to goodwill and tradename
which will be amortized over 40 years on a straight-line basis.

Total MCI stand-alone revenues are projected to exceed $34 billion within five
years. This level of revenue implies a compound annual growth rate ("CAGR") of
approximately 12.3%. Estimated total revenues from the acquired in-process
technology peak in the year 2001 and steadily decline in 2002 through 2009 as
other new product and service technologies are expected to be introduced by the
combined company. These projections are based on management's estimates of
market size and growth, expected trends in technology, and the expected timing
of new product introductions. These projections, which constitute
forward-looking statements, were not made with a view to public disclosure and
were based on a variety of estimates and judgments. Actual results may vary
materially due to a number of significant risks, including, without limitation,
uncertainties regarding future business, economic, competitive, regulatory and
financial market conditions and future business decisions, all of which are
difficult to predict and many of which are beyond the Company's control. No
assurance can be given that such projections will be realized. The Company does
not intend to update or supplement these projections in the future.

COMPUSERVE AND ANS

The in-process technology acquired in the CompuServe Merger and the AOL
Transaction consisted of three main R&D efforts underway at CNS and two main R&D
efforts underway at ANS. The aggregate value assigned to CompuServe and ANS
in-process technology was $429 million. These projects included next generation
network technologies and new value-added networking applications, such as
application hosting, multimedia technologies and virtual private data networks.

A brief description of the in-process research and development projects
purchased in connection with the CompuServe Merger and AOL Transaction is set
forth below:

                                    Page 12

<PAGE>   13

o    Virtual Private Data Network ("VPDN"). In order to provide competitive VPDN
     products and services, CNS had undertaken, at the acquisition date, a
     number of important projects. CNS was developing a new radius-roaming
     functionality. This capability was intended to allow remote VPDN users to
     "roam" the country, much like cellular phone users, and access their
     corporate network without regard for how to initiate a remote connection.
     CNS was also developing another VPDN adjunct product called the Phone
     Access Locator. This product, if successful, was to be used by CNS' remote
     customers to look up local network access point phone numbers. Other VPDN
     development efforts underway related to voluntary tunneling and development
     of new packet network technologies. Achievements leading up to the
     acquisition included completion of certain software specifications and
     design limited concept testing, and performance verification. Remaining
     efforts included large-scale design, performance testing, debugging, and
     quality assurance. Costs to complete this R&D project were projected to be
     approximately $3 million in 1998 and $4 million in 1999. The risk of not
     completing these efforts was rated as medium. Project failure would result
     in the elimination of the Company's future revenues and profits
     attributable to the R&D.

o    Network Technologies. At the date of the CompuServe Merger, CNS had
     undertaken significant projects to develop new IP-based network
     technologies. These projects involved many separate efforts, including:
     researching the use of switching and multicast technologies; investigating
     and testing proprietary switching and routing technology; researching and
     developing Fast Ethernet and/or Gigabit Ethernet protocols; and developing
     and testing switches with routing functionality. CNS was also working on a
     significant effort to enhance workstation-based open systems technologies
     that contained new functions intended to allow the company to address new
     market needs. CNS' development work included the testing of new products
     and the development of new in-house network management solutions.
     Achievements leading up to the acquisition included completion of certain
     software and hardware specifications and design. Remaining efforts included
     large-scale design, performance testing and debugging. Costs to complete
     this R&D project were projected to be approximately $6 million in 1998 and
     $8 million in 1999. The risk of not completing these efforts was rated as
     medium. Project failure would result in the elimination of the Company's
     future revenues and profits attributable to the R&D.

o    Application Hosting. At the date of the CompuServe Merger, CNS had 
     undertaken an effort to develop proprietary software, and identify and test
     third party Web hosting technology in order to provide complex Web and
     groupware hosting services. As part of this effort, CNS was attempting to
     develop a new capability in which it would host complex Web sites, without
     duplicating any development efforts. In addition, CNS was in the process of
     developing leading-edge electronic commerce solutions for its complex Web
     hosting product. CNS was also developing proprietary software and testing
     reporting tools. CNS was also in the process of making substantial
     enhancements that would result in a new e-mail gateway. Achievements
     leading up to the acquisition included completion of certain software
     specifications and design, limited concept testing, and performance
     verification. Remaining efforts included large-scale design and
     engineering, performance testing, and debugging. Costs to complete this R&D
     project were projected to be approximately $1 million in 1998 and $2
     million in 1999. The risk of not completing these efforts was rated as
     medium. Project failure would result in the elimination of the Company's
     future revenues and profits attributable to the R&D.

o    Supercore. At the date of the AOL Transaction, Supercore was a significant
     project involving R&D related to data transmission and VPDN technologies.
     The Supercore project was intended to provide for the differentiation of
     connectivity service based on the needs of the transmission. At the time of
     the acquisition, ANS had made significant progress on this important R&D
     effort. Achievements leading up to the acquisition included a completed
     design and limited performance evaluation. Remaining efforts involved
     large-scale testing and proof of concept. ANS estimated it would spend
     approximately $12 million in 1998 and $17 million in 1999 to complete R&D
     projects related to Supercore. The risk of not completing these projects
     was considered medium to high. Failure to complete the R&D would cause the
     Company's future revenues and profits attributable to the R&D not to
     materialize.

o    Value Added Applications (Security Systems, Application Hosting, and
     Multimedia Systems). At the date of the AOL Transaction, ANS had a number
     of R&D projects underway related to security systems, application hosting,
     and multimedia systems. In connection with a security system product called
     Interlock, ANS was developing next-generation capabilities to render
     multiple Local Area Network ("LAN") connections, Simple Network Management
     Protocol ("SNMP") support, and the selective use of Java and ActiveX
     protocols. Other R&D efforts were related to distributed firewalls,
     firewall farm technology, new encryption technologies, and multiple LAN
     interface capability. A

                                    Page 13

<PAGE>   14
     Windows project involved substantially improving aspects of the server
     software intended to make it support a Domain Named System ("DNS") cache,
     firewall functionality, and remote administration. ANS also had several
     application R&D projects underway that were aimed at the development of a
     set of software tools, which would culminate in a new complex Web hosting
     product. ANS' complex Web hosting product was being developed to have near
     real-time database replication across geographic location, which would
     allow ANS, if successful, to maintain a company's Web site on several
     servers. As of the acquisition date, ANS did not offer multimedia services
     over its network. As a result, ANS was conducting R&D related to four
     multimedia services: fax over IP, video over IP, voice over IP, and call
     centers. R&D activity included system and software design, development of
     prototype systems, and systems testing. The most important R&D efforts
     related to multimedia systems were development of priority routing. In
     addition to ANS' security systems, application hosting, and multimedia R&D
     projects, ANS had undertaken a number of additional R&D efforts to develop
     technologies that would allow customers to access the system from any
     platform and to create a new data warehouse. In concert with these efforts,
     ANS was also addressing the customer's use of reporting, query, and On-Line
     Analytical Processing ("OLAP") tools. Achievements on the value added
     applications R&D leading up to the acquisition included the design and
     development of certain software algorithms, unit testing, and limited
     system testing. Remaining efforts included additional design work,
     large-scale testing, significant performance enhancements, and debugging.
     ANS expected to spend approximately $4 million in 1998 and $5 million in
     1999 to complete the value added applications R&D. The risk of not
     completing these projects was considered to be medium to high. Failure to
     complete the R&D would cause the Company's future revenues and profits
     attributable to the R&D not to materialize.

The value assigned to purchased in-process technology was determined by
estimating the contribution of the purchased in-process technology to developing
commercially viable products, estimating the resulting net future cash flows
from the expected sales of such products, and discounting the net future cash
flows to their present value using a risk-adjusted discount rate. The Company
expected to begin generating the economic benefits from the ANS and CNS projects
in progress as they were completed in late 1998 and 1999. At the time of
valuation, the cost to complete all such projects was approximately $62 million.
Funding for completion of the in-process projects was expected to be obtained
from internally generated sources. Based on the cost incurred at the acquisition
dates and the milestones achieved by ANS and CNS, in aggregate, ANS' projects
were estimated to be approximately 80% complete, while CNS' projects were
estimated to be approximately 60% complete.

The allocation of purchase price for the CompuServe Merger and the AOL
Transaction included allocations to developed technologies, assembled work
force, customer relationships and tradenames which will be amortized on a
straight-line basis over 10 years.

Total ANS and CNS stand-alone revenues are projected to exceed $3.5 billion
within five years. This level of revenues implied a CAGR of approximately 32%.
Estimated total revenues from the acquired in-process technology related to CNS
peak in the year 2002 and steadily decline through 2006 as other new product and
service technologies are expected to be introduced by the Company. Estimated
total revenues from the acquired in-process technology related to ANS peak in
the year 2004 and steadily decline through 2006. These projections are based on
management's estimates of market size and growth, expected trends in technology,
and the expected timing of new product introductions. These projections, which
constitute forward-looking statements, were not made with a view to public
disclosure and were based on a variety of estimates and judgments. Actual
results may vary materially due to a number of significant risks, including,
without limitation, uncertainties regarding future business, economic,
competitive, regulatory and financial market conditions and future business
decisions, all of which are difficult to predict and many of which are beyond
the Company's control. No assurance can be given that such projections will be
realized. The Company does not intend to update or supplement these projections
in the future.

(F) LONG-TERM DEBT

In connection with the BFP Merger, the Company announced in February 1998 that
it had commenced offers offer (the "Tender Offers") to purchase for cash various
series of BFP outstanding notes (the "BFP Notes"). Concurrently with the Tender
Offers, MCI WorldCom obtained the requisite consents to eliminate certain
restrictive covenants and amend certain other provisions of the respective
indentures of the BFP Notes. In March 1998, the Company accepted all BFP Notes
validly tendered. As of the expiration of the Tender Offers, MCI WorldCom had
received valid tenders and consents from holders of approximately $1.1 billion
of BFP Notes (over 99% of total outstanding). The funds required to pay all
amounts required under the Tender Offers were obtained by MCI WorldCom from
available working capital and lines of credit. In connection with the Tender
Offers and related refinancings, MCI WorldCom recorded an extraordinary item of
$128.7 million, net of income tax benefit of $77.6 million in the first quarter
of 1998.

On August 6, 1998, MCI WorldCom replaced its existing $3.75 billion and
$1.25 billion revolving credit facilities (the "Old Credit Facilities") with
$12.0 billion in credit facilities consisting of a $3.75 billion Amended and
Restated Facility A Revolving Credit Agreement ("Facility A Loans"), a $1.25
billion Amended and Restated Facility B Term Loan Agreement

                                    Page 14

<PAGE>   15

("Facility B Loans") and a new $7 billion 364-Day Revolving Credit and Term Loan
Agreement (the "Facility C Loans"). The Facility C Loans, together with the
Facility A Loans and Facility B Loans, hereinafter referred to as the "New
Credit Facilities." The New Credit Facilities provide liquidity support for the
Company's commercial paper program and will be used for other general corporate
purposes. The Facility A Loans and the Facility B Loans mature on June 30, 2002.
The Facility C Loans have a 364-day term, which may be extended for up to two
successive 364-day terms thereafter to the extent of the committed amounts from
those lenders consenting thereto, with a requirement that lenders holding at
least 51% of the committed amounts consent. Additionally, effective as of the
end of such 364-day term, the Company may elect to convert up to $4 billion of
the principal debt outstanding under the Facility C Loans from revolving loans
to term loans with a maturity date no later than one year after the conversion.
The New Credit Facilities bear interest payable in varying periods, depending on
the interest period, not to exceed six months, or with respect to any Eurodollar
Rate borrowing, 12 months if available to all lenders, at rates selected by the
Company under the terms of the New Credit Facilities, including a Base Rate or
Eurodollar Rate, plus the applicable margin. The applicable margin for the
Eurodollar Rate borrowing varies from 0.35% to 0.75% as to Facility A Loans and
Facility B Loans and from 0.225% to 0.450% as to Facility C Loans, in each case
based upon the better of certain debt ratings. The New Credit Facilities are
unsecured but include a negative pledge of the assets of the Company and its
subsidiaries (subject to certain exceptions). The New Credit Facilities require
compliance with a financial covenant based on the ratio of total debt to total
capitalization, calculated on a consolidated basis. The New Credit Facilities
require compliance with certain operating covenants which limit, among other
things, the incurrence of additional indebtedness by the Company and its
subsidiaries, sales of assets and mergers and dissolutions, which covenants are
generally less restrictive than those contained in the Old Credit Facilities and
which do not restrict distributions to shareholders, provided the Company is not
in default under the New Credit Facilities. The Facility A Loans and the
Facility C Loans are subject to annual commitment fees not to exceed 0.25% and
0.12%, respectively, of any unborrowed portion of the facilities.

Subsequent to September 30, 1998, the Company elected to repay the Facility B
Loans and cancel the facility commitment of $1.25 billion. The funds used to
repay Facility B Loans were obtained by the Company from availability under the
Company's New Credit Facilities and commercial paper program.

The Company approved the issuance of commercial paper notes in the aggregate
principal amount not to exceed $10.0 billion, which notes have a maturity not to
exceed 364 days from the date of issuance. The Company maintains unused credit
facilities equal to 100% of the commercial paper notes outstanding. As of
September 30, 1998, $2.74 billion was outstanding under the commercial paper
program.

On August 11, 1998, the Company completed a public debt offering of $6.1 billion
principal amount of debt securities. The net proceeds of $6.04 billion were used
to pay down commercial bank debt, finance the approximately $7 billion payment
to BT and for general corporate purposes.

The public debt offering consisted of $1.5 billion principal amount of 6.125%
Notes Due 2001 (the "Notes Due 2001"), which mature August 15, 2001, $600
million principal amount of 6.25% Notes Due 2003 (the "Notes Due 2003"), which
mature on August 15, 2003, $2.25 billion principal amount of 6.40% Notes Due
2005 (the "Notes Due 2005"), which mature August 15, 2005 and $1.75 billion
principal amount of 6.95% Notes Due 2028 (the "Notes Due 2028" and collectively
with the Notes Due 2001, the Notes Due 2003 and the Notes Due 2005, the
"Notes"). The Notes bear interest payable semiannually in arrears on February 15
and August 15 of each year, commencing February 15, 1999.

The Notes are redeemable, as a whole or in part, at the option of the Company,
at any time or from time to time, at respective redemption prices equal to the
greater of (i) 100% of the principal amount of the Notes to be redeemed or (ii)
the sum of the present values of the Remaining Scheduled Payments (as defined
therein) plus (a) 10 basis points for the Notes Due 2001, (b) 15 basis points
for the Notes Due 2003 and the Notes Due 2005, or (c) 20 basis points for the
Notes Due 2028, plus in the case of each of clause (i) and (ii), accrued
interest to the date of redemption.

At the time of the MCI Merger, MCI had outstanding $1.44 billion of MCI Senior
Debentures with rates ranging from 7.125% to 8.25% and maturing from January
2023 through June 2027 (the "MCI Senior Debentures"), and $2.66 billion of MCI
Senior Notes with rates ranging from 6.125% to 7.5% and maturing from March 1999
through April 2012 (the "MCI Senior Notes"). Additionally, MCI had outstanding a
$1.34 billion note payable in annual local currency installments over the next
two years as a result of MCI's purchase of Embratel on August 4, 1998, and other
debt including, without limitation, capital leases.

                                    Page 15

<PAGE>   16
The following table sets forth the long-term debt of the Company before and
after consideration of Embratel as of September 30, 1998 (in millions):

<TABLE>
<CAPTION>
                                                                            Excluding
                                                                             Embratel          Embratel         Consolidated
                                                                           ------------        ---------        ------------
<S>                                                                        <C>                 <C>                <C>      
                   Commercial paper and credit facilities borrowings       $      3,968        $      --          $   3,968
                   6.125% Notes Due 2001                                          1,500               --              1,500
                   6.25% Notes Due 2003                                             600               --                600
                   6.40% Notes Due 2005                                           2,250               --              2,250
                   6.95% Notes Due 2028                                           1,750               --              1,750
                   7.55% Senior Notes Due 2004                                      600               --                600
                   7.75% Senior Notes Due 2007                                    1,100               --              1,100
                   7.75% Senior Notes Due 2027                                      300               --                300
                   9.375% Senior Notes Due 2004                                     680               --                680
                   8.875% Senior Notes Due 2006                                     667               --                667
                   MCI Senior Debentures                                          1,444               --              1,444
                   MCI Senior Notes                                               2,657               --              2,657
                   Note payable due in annual installments through 2000              --            1,342              1,342
                   Other debt and capital leases (maturing through 2006)            868              548              1,416
                                                                           ------------        ---------          ---------
                                                                                 18,384            1,890             20,274
                   Less:  Short-term debt and current maturities                 (4,125)            (117)            (4,242)
                                                                           ------------        ---------          ---------
                                                                           $     14,259        $   1,773          $  16,032
                                                                           ============        =========          =========
</TABLE>

(G) COMPANY OBLIGATED MANDATORILY REDEEMABLE PREFERRED SECURITIES OF SUBSIDIARY
TRUST HOLDING SOLELY JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES OF THE
COMPANY

In connection with the MCI Merger, the Company acquired $750 million aggregate
principal amount of 8% Cumulative Quarterly Income Preferred Securities, Series
A, representing 30 million shares outstanding ("preferred securities") due June
30, 2026 which were previously issued by MCI Capital I, a wholly owned Delaware
statutory business trust (the "Trust"). The Trust exists for the sole purpose of
issuing the preferred securities and investing the proceeds in the Company's 8%
Junior Subordinated Deferrable Interest Debentures, Series A ("Subordinated Debt
Securities") due June 30, 2026, the only assets of the Trust.

Holders of the preferred securities are entitled to receive preferential
cumulative cash distributions from the Trust on a quarterly basis, provided the
Company has not elected to defer the payment of interest due on the Subordinated
Debt Securities to the Trust. The Company may elect this deferral from time to
time, provided that the period of each such deferral does not exceed five years.
The preferred securities are subject to mandatory redemption, in whole or in
part, upon repayment of the Subordinated Debt Securities at maturity or earlier
in an amount equal to the amount of Subordinated Debt Securities maturing or
being repaid. In addition, in the event the Company terminates the Trust, the
Subordinated Debt Securities will be distributed to the then holders of the
preferred securities of the Trust. The Trust assets had an estimated fair market
value of $773.2 million at September 30, 1998.

The Company and MCI have executed various guarantee agreements and supplemental
indentures which agreements, when taken together with the issuance of the
Subordinated Debt Securities, constitute a full, irrevocable, and unconditional
guarantee by the Company and MCI of all of the Trust's obligations under the
preferred securities (the "Guarantee"). A Guarantee Agreement and Supplement No.
1 thereto covers payment of the preferred securities' quarterly distributions
and payments on maturity or redemption of the preferred securities, but only in
each case to the extent of funds held by the Trust. If the Company does not make
interest payments on the Subordinated Debt Securities held by the Trust, the
Trust will have insufficient funds to pay such distributions. The obligations of
the Company and MCI under the Guarantee and the Subordinated Debt Securities are
subordinate and junior in right of payment to all senior debt of the Company and
MCI, respectively.

                                    Page 16

<PAGE>   17

(H) PREFERRED STOCK

In May 1998, the Company exercised its option to redeem all of the outstanding
Series A 8% Cumulative Convertible Preferred Stock (the "Series A Preferred
Stock") and related Depositary Shares. Prior to the redemption date,
substantially all of the holders of Series A Preferred Stock elected to convert
the preferred stock into Common Stock, resulting in the issuance of
approximately 32.7 million shares of Common Stock.

(I) COMPREHENSIVE INCOME

Effective January 1, 1998, MCI WorldCom adopted SFAS No. 130 "Reporting
Comprehensive Income." This statement requires the reporting of comprehensive
income in addition to net income from operations. Comprehensive income is a more
inclusive financial reporting methodology that includes disclosure of certain
financial information that historically has not been recognized in the
calculation of net income.

The following table reflects the calculation of comprehensive income (loss) for
MCI WorldCom for the three and nine months ended September 30, 1998 and 1997 (in
millions):

<TABLE>
<CAPTION>
                                                                    For the Three Months        For the Nine Months
                                                                    Ended September 30,         Ended September 30,
                                                                   -----------------------      -------------------
                                                                     1998          1997          1998          1997
                                                                   ---------     ---------      ---------   -------

<S>                                                                <C>           <C>            <C>         <C>    
    Net income (loss) applicable to common shareholders            $  (2,947)    $      69      $  (3,141)  $   122
                                                                   ---------     ---------      ---------   -------
    Other comprehensive income (loss):
      Foreign currency translation gains (losses)                         24             1             15       (20)
      Unrealized holding gains (losses):
         Unrealized holding gains (losses) during the period             (22)           (1)           (39)        8
         Reclassification adjustment for losses
             included in net (income) loss                                49            --             36        --
                                                                   ---------     ---------      ---------   -------
    Other comprehensive income (loss) before income taxes                 51            --             12       (12)
    Income tax expense (benefit)                                         (10)           --              1        (3)
                                                                   ---------     ---------      ---------   -------
    Other comprehensive income (loss)                                     41            --             13       (15)
                                                                   ---------     ---------      ---------   -------
    Comprehensive income (loss) applicable to common               
     shareholders                                                  $  (2,906)   $       69        $  (3,128)  $ 107
                                                                   =========    ==========      =========   =======
</TABLE>

(J) PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

MCI

MCI has a noncontributory defined benefit pension plan (the "MCI Plan") and a
supplemental pension plan (the "Supplemental Plan"), and the Western Union
International, Inc. ("WUI"), a subsidiary of MCI, has a defined benefit pension
plan (the "WUI Plan"). Collectively, these plans cover substantially all MCI
employees who work 1,000 hours or more in a year.

The MCI Plan and the Supplemental Plan provide pension benefits that are based
on the employee's compensation for each year of service prior to retirement. The
WUI Plan provides pension benefits based on the employee's compensation for each
year of service after 1990 and prior to retirement.

MCI's policy is to fund the MCI Plan and the WUI Plan in accordance with the
funding requirements of the Employee Retirement Income Security Act of 1974 and
within the limits of allowable tax deductions. The assets of the plans are
primarily invested in corporate equities, government securities, and corporate
debt securities.

The information for the pension plans' assets and obligations consists of 
(dollars in millions):

                                    Page 17

<PAGE>   18

<TABLE>
<S>                                                       <C>     
CHANGE IN BENEFIT OBLIGATION
   Benefit obligation at January 1, 1998                     $    563
   Service cost                                                    54
   Interest cost                                                   31
   Actuarial loss                                                  35
   Benefits paid                                                  (25)
   Assumption change                                               81
                                                             --------
   Benefit obligation at September 30, 1998                  $    739

CHANGE IN PLAN ASSETS
   Fair value at January 1, 1998                             $    494
   Actual return on plan assets                                    (3)
   Employer contributions                                          63
   Benefits paid                                                  (25)
                                                             --------
   Fair value of assets at September 30, 1998                     529
                                                             --------
   Accrued benefit cost                                      $   (210)
                                                             ========

WEIGHTED AVERAGE ACTUARIAL ASSUMPTIONS:
Discount rate                                                    6.00%
Expected return on plan assets                                   9.00%
Rate of compensation increase                                    5.75%
</TABLE>

Annual service cost is determined using the Projected Unit Credit actuarial
method, and prior service cost is amortized on a straight-line basis over the
average remaining service period of employees. The MCI Plan accumulated benefit
obligation exceeds the fair value of assets by $108 million. There is no
additional minimum pension liability required to be recognized.

Retirement benefits, under the MCI Plan, are calculated by first establishing an
initial balance for each participant based on the present value of benefits
earned through 1995. For service after 1995, participants accrue benefits based
on a specific percentage of annual salary and earn interest credits based on the
prior year's balance at a specific interest rate. Employees who are age 50 or
older and have at least five years of service as of December 31, 1995, will have
their benefits continue to accrue under a previous formula through the year
1998. Effective January 1, 1999, no future compensation credits will be earned
by participants. Participant account balances will continue to accrue interest
credits at a specified rate.

EMBRATEL

Embratel sponsors a contributory defined benefit pension plan and a
post-retirement benefit plan, both managed by the Fundacao Embratel de
Seguridade Social ("Telos"). Approximately 97% of Embratel's employees are
covered by these plans.

The pension benefit is generally defined as the difference between (i) 90% of
the retiree's average salary during the last 36 months indexed to the date of
retirement and (ii) the value of the retirement pension paid by the Brazilian
social security system. For retired employees, the initial pension payment is
subsequently adjusted upwards to recognize cost of living increases and
productivity awards granted to active employees. In addition to the pension
supplements, post-retirement health care and life insurance benefits are
provided to eligible pensioners and their dependents.

Contributions to the Embratel plans are based on actuarial studies prepared by
independent actuaries under Brazilian regulations. The actuarial studies are
revised periodically to identify whether adjustments to the contributions are
necessary.

The information for the defined benefit pension and post-retirement plans'
assets and obligations, converted to U.S. dollars and prepared in accordance
with U.S. generally accepted accounting principles consists of (dollars in
millions):

                                    Page 18

<PAGE>   19


<TABLE>
<CAPTION>
                                                      Pension Benefits    Other Benefits
                                                      ----------------    --------------
<S>                                                          <C>             <C>        
CHANGE IN BENEFIT OBLIGATION
   Benefit obligation at January 1, 1998                     $   1,231       $       265
   Service cost                                                     34                 7
   Interest cost                                                    53                12
   Actuarial loss                                                  (48)               (7)
   Benefits paid                                                   (22)               (2)
   Assumption change                                              (182)               --
                                                             ---------       -----------
   Benefit obligation at September 30, 1998                  $   1,066       $       275

CHANGE IN PLAN ASSETS
   Fair value at January 1, 1998                             $     550         $      29
   Actual return on plan assets                                    (20)               --
   Employer contributions                                           31                 4
   Employee contributions                                           19                --
   Benefits paid                                                   (22)               (2)
                                                             ---------       -----------
   Fair value of assets at September 30, 1998                $     558       $        31

FUNDED STATUS                                                $    (508)      $      (244)

Unrecognized net actuarial (gain) loss                            (212)               88
Unrecognized transition liability                                  276                --
                                                             ---------       -----------
Accrued benefit cost                                         $    (444)      $      (156)
                                                             =========       ===========

WEIGHTED AVERAGE ACTUARIAL ASSUMPTIONS:
Discount rate                                                     6.00%             6.00%
Expected return on plan assets                                    9.00%             9.00%
Rate of compensation increase                                     3.25%
</TABLE>

The defined benefit pension plan has an accumulated benefit obligation in excess
of fair value of assets of $345 million. There is no additional minimum pension
liability to be recognized.

Health care cost trend rates of increase were projected at annual rates
excluding inflation ranging from 6.48% in 1998 to 2.00% in 2047. The effect of a
one percentage point increase in the assumed health care cost trend rates would
increase the accumulated post-retirement benefit obligation at September 30,
1998 by $63 million and the aggregate service and interest cost components by $7
million on an annual basis. The effect of a one percentage point decrease in the
assumed health care cost trend rate would reduce the post-retirement benefit
obligation by $51 million and reduce the total service and interest cost
component by $6 million.

Embratel has created a new defined contribution plan (the "new plan"), through
Telos, which is in the regulatory review process with the Brazilian government.
Government approval of the new plan is anticipated by the end of 1998. Once
government approval of the new plan is received, all newly hired employees of
Embratel will automatically enter the new plan and entry into the existing
Embratel pension and post-retirement plans will be frozen. Current Embratel
employees have been given the option to migrate from the existing defined
benefit pension and post-retirement benefit plans to the new plan. The option
expires on December 31, 1998 and was effective on January 1, 1999. The new plan
will provide an employer match on employee contributions based on certain
limits, transfer of the defined benefit account balance, employee directed
investment, and a lump sum payment from the post-retirement plan, which can be
used to assist with medical coverage in the future. Any employees not electing
to migrate to the new plan will remain in the existing plans and will not have a
future opportunity to move to the new plan.

(K) CONTINGENCIES

The Company is involved in legal and regulatory proceedings generally incidental
to its business and has included accrued

                                    Page 19

<PAGE>   20

loss contingencies in other liabilities for certain of these matters. The
Company does not expect that the results in these lawsuits and proceedings will
have a material adverse effect on the Company's consolidated results of
operations or financial position.

FEDERAL REGULATION. In implementing the Telecommunications Act of 1996 (the
"Telecom Act"), the Federal Communications Commission ("FCC") established
nationwide rules designed to encourage new entrants to participate in the local
services markets through interconnection with the ILECs, resale of ILECs' retail
services and use of individual and combinations of unbundled network elements.
These rules set the groundwork for the statutory criteria governing entry of the
Bell Operating Companies (the "BOCs") into the long distance market. Appeals of
the FCC order adopting these rules were consolidated before the United States
Court of Appeals for the Eighth Circuit (the "Eighth Circuit"). The Eighth
Circuit found constitutional challenges to certain practices implementing cost
provisions of the Telecom Act that were ordered by certain Public Utility
Commissions ("PUCs") to be premature, but vacated significant portions of the
FCC's nationwide pricing rules, and vacated an FCC rule requiring that unbundled
network elements be provided on a combined basis. In response to requests by the
Solicitor General, on behalf of the FCC, and certain other parties, including
MCI WorldCom, the United States Supreme Court has agreed to review the decision
of the Eighth Circuit. The case is under consideration by the Court and a
decision is expected before June 1999. Certain BOCs have also raised
constitutional challenges to provisions of the Telecom Act restricting BOC
provision of long distance services, manufacturing of telecommunications
equipment, electronic publishing and alarm monitoring services. On December 31,
1997, the United States District Court for the Northern District of Texas (the
"Texas Federal District Court") ruled that these restrictions violate the Bill
of Attainder Clause of the U.S. Constitution. The decision only applied to SBC
Corporation, US West Communications Group, and Bell Atlantic Corporation. At the
request of various parties, on February 11, 1998 the Texas Federal District
Court issued a stay of its decision pending appeal. AT&T Corp., MCI, the
Department of Justice, the FCC and other parties appealed the decision to the
United States Court of Appeals for the Fifth Circuit (the "Fifth Circuit"). On
September 4, 1998, the Fifth Circuit reversed the decision of the Texas Federal
District Court and upheld the constitutionality of the challenged provisions. On
October 19, 1998, SBC Corporation, US West Communications Group and Bell
Atlantic Corporation filed petitions requesting the U.S. Supreme Court review
the Fifth Circuit decision. The Supreme Court has not yet acted on the request.
BellSouth Corporation ("BellSouth") also raised the Bill of Attainder issue in
its appeal before the United States Court of Appeals for the D.C. Circuit of the
FCC's denial of BellSouth's application to provide access long distance service
in South Carolina. A decision in that case is pending. MCI WorldCom cannot
predict either the ultimate outcome of these or future challenges to the Telecom
Act, any related appeals of regulatory or court decisions, or the eventual
effect on its businesses or the industry in general.

The FCC has denied applications filed by a Regional Bell Operating Company
("RBOC") seeking authority to provide inter local access transport area
("interLATA") long distance service. In its denial of an Ameritech Corporation
("Ameritech") application and a BellSouth application, the FCC provided detailed
guidance to applicants regarding the obligations of the applicants, the format
of future applications, the content of future applications, and the review
standards that it will apply in evaluating any future applications. The National
Association of Regulatory Utility Commissioners and several state regulatory
commissions have appealed jurisdictional aspects of that Ameritech application
denial to the Eighth Circuit. On January 22, 1998, the Eighth Circuit granted
the various appeals and held that the FCC does not have jurisdiction to consider
pricing issues when deciding RBOC interLATA long distance applications. The
Solicitor General, on behalf of the FCC and certain other parties, including MCI
WorldCom, has asked the U.S. Supreme Court to review the Eighth Circuit's
decision. The Supreme Court has yet to act on the petitions. MCI WorldCom cannot
predict either the outcome of these appeals, or the BOCs' willingness to abide
by these FCC guidelines, or the timing or outcome of future applications
submitted to the FCC. Additionally, the FCC issued a Notice of Proposed
Rulemaking seeking to allow the RBOCs to establish separate subsidiaries to
provide enhanced data services. Other RBOCs have filed or announced their
intention to file applications at the FCC for authority to provide interLATA
services. Additionally, the FCC and several PUCs are considering a proposal that
would allow BOCs electing to create separate wholesale network and retail
organizations to enter the long distance market on an accelerated basis. MCI
WorldCom cannot predict the outcome of these proceedings or whether the outcome
will have a material impact upon its consolidated financial position or results
of operations.

On May 7, 1997, the FCC announced that it would issue a series of orders that
will reform Universal Service Subsidy allocations and adopted various reforms to
the existing rate structure for interstate access services provided by the ILECs
that are designed to reduce access charges, over time, to more economically
efficient levels and rate structures. It also affirmed that information service
providers (including, among others, ISPs) should not be subject to existing
access charges

                                    Page 20

<PAGE>   21

("ISP Exemption"). Petitions for reconsideration of, among other things, the
access service and ISP Exemption related actions were filed before the FCC and
appeals taken to various United States Courts of Appeals. On reconsideration,
the FCC in significant part affirmed the access charge and ISP Exemption actions
and the court appeals have been consolidated before the Eighth Circuit. On
August 18, 1998, the Eighth Circuit denied all appeals. Also, several state
agencies have started proceedings to address the reallocation of implicit
subsidies contained in the access rates and retail service rates to state
universal service funds. Access charges are a principal component of MCI
WorldCom's telecommunication expense. Additionally, modification of the ISP
Exemption could have an adverse effect on the Company's Internet-related
services business. MCI WorldCom cannot predict either the outcome of these
appeals or whether or not the result(s) will have a material impact upon its
consolidated financial position or results of operations.

The FCC issued on December 24, 1996 a Notice of Inquiry to seek comment on
whether it should consider various actions relating to interstate information
services and the Internet. The FCC recognized that these services and recent
technological advances may be constrained by current regulatory practices that
have their foundations in traditional circuit switched telecommunications
services and technologies. Based upon this and other proceedings, the FCC may
permit telecommunications companies, BOCs, or others to increase the scope or
reduce the cost of their Internet access services. MCI WorldCom cannot predict
the effect that the Notice of Inquiry, the Telecom Act or any future
legislation, regulation or regulatory changes may have on its consolidated
financial position or results of operations.

INTERNATIONAL. In December 1996, the FCC adopted a new policy that makes it
easier for United States international carriers to obtain authority to route
international public switched voice traffic to and from the United States
outside of the traditional settlement rate and proportionate return regimes
("alternative traffic routing"). In August 1998, the FCC proposed to modify its
rules to make it even easier for U.S. international carriers to engage in
alternative traffic routing. In February 1997, the United States entered into a
World Trade Organization Agreement (the "WTO Agreement") that should have the
effect of liberalizing the provision of switched voice telephone and other
telecommunications services in scores of foreign countries over the next several
years. The WTO Agreement became effective in February 1998. In order to comply
with United States commitments to the WTO Agreement, the FCC implemented new
rules in February 1998 that liberalize existing policies regarding (i) the
services that may be provided by foreign affiliated United States international
common carriers, including carriers controlled or more than 25 percent owned by
foreign carriers that have market power in their home markets, and (ii) the
provision of alternative traffic routing. The new rules make it much easier for
foreign affiliated carriers to enter the United States market for the provision
of international services.

In August 1997, the FCC adopted mandatory settlement rate benchmarks. These
benchmarks are intended to reduce the rates that United States carriers pay
foreign carriers to terminate traffic in their home countries. The FCC will also
prohibit a United States carrier affiliated with a foreign carrier from
providing facilities-based service to the foreign carrier's home market until
and unless the foreign carrier has implemented a settlement rate within the
benchmark. The FCC also adopted new rules that will liberalize the provision of
switched services over private lines to World Trade Organization member
countries, by allowing such services on routes where 50% or more of United
States billed traffic is being terminated in the foreign country at or below the
applicable settlement rate benchmark or where the foreign country's rules
concerning provision of international switched services over private lines are
deemed equivalent to United States rules.

Although the FCC's new policies and implementation of the WTO Agreement may
result in lower out-payments by MCI WorldCom to terminate international traffic,
there is a risk that the in-payment that MCI WorldCom will receive from inbound
international traffic may decrease to an even greater degree. The implementation
of the WTO Agreement may also make it easier for foreign carriers with market
power in their home markets to offer United States and foreign customers
end-to-end services to the disadvantage of MCI WorldCom, which may continue to
face substantial obstacles in obtaining from foreign governments and foreign
carriers the authority and facilities to provide such end-to-end services.
Further, many foreign carriers have challenged, in court and at the FCC, the
FCC's order adopting mandatory settlement rate benchmarks. If the FCC's
settlement rate benchmark order was overturned, it could accelerate the
full-fledged entry of foreign carriers into the United States, and make it more
advantageous for foreign carriers to route international traffic into the United
States at low, cost-based termination rates, while United States carriers would
continue to have little choice but to route international traffic into most
foreign countries at much higher, above cost, settlement rates.

LITIGATION. On November 4, 1996, and thereafter, and on August 25, 1997, and
thereafter, MCI and all of its directors, including the two directors who were
also executive officers of MCI and the three directors elected by BT, were named
as

                                     Page 21

<PAGE>   22

defendants in a total of 15 complaints filed in the Court of Chancery in the
State of Delaware. BT was named as a defendant in 13 of the complaints. The
complaints were brought by alleged stockholders of MCI, individually and
purportedly as class actions on behalf of all other stockholders of MCI. In
general, the complaints allege that MCI's directors breached their fiduciary
duty in connection with the MCI BT Merger Agreement, dated November 3, 1996 (the
"MCI BT Merger Agreement") that BT aided and abetted those breaches of duty,
that BT owes fiduciary duties to the other stockholders of MCI and that it
breached those duties in connection with the MCI BT Merger Agreement. The
complaints seek damages and injunctive and other relief.

On or about October 8, 1997, all of MCI's directors, including the two MCI
directors who were also executive officers of MCI and the three MCI directors
elected by BT, were named as defendants in a purported derivative complaint
filed in the Court of Chancery in the State of Delaware. BT and Tadworth
Corporation were also named as defendants, and MCI was named as a nominal
defendant. The plaintiff, derivatively and on behalf of MCI, alleges breach of
fiduciary duty by the MCI directors and aiding and abetting those breaches of
duty by BT in connection with the MCI BT Merger Agreement and WorldCom's
exchange offer. The complaint seeks injunctive relief, damages and other relief.

One of the purported stockholder class actions pending in Delaware Chancery
Court has been amended and plaintiffs in four of the other purported stockholder
class actions have moved to amend their complaints to name WorldCom and
Acquisition Subsidiary, as additional defendants. They generally allege that the
defendants breached their fiduciary duties to stockholders in connection with
the MCI Merger and the agreement to pay a termination fee to WorldCom, and
allege discrimination in favor of BT in connection with the MCI Merger. They
seek, inter alia, damages and injunctive relief prohibiting the consummation of
the MCI Merger and the payment of the inducement fee to BT.

Three complaints were filed in the Federal District Court in Washington, D.C.,
as class actions on behalf of purchasers of MCI shares. The three cases were
consolidated on April 1, 1998. On or about May 8, 1998, the plaintiffs in all
three cases filed a consolidated amended complaint alleging, on behalf of
purchasers of MCI's shares between July 11, 1997 and August 21, 1997, inclusive,
that MCI and certain of its officers and directors failed to disclose material
information about MCI, including that MCI was renegotiating the terms of the MCI
BT Merger Agreement. The consolidated amended complaint seeks damages and other
relief. The Company and the other defendants have moved to dismiss the
consolidated amended complaint.

On May 7, 1998, GTE Corporation and three of its subsidiaries filed suit in the
U.S. District Court for the District of Columbia against MCI and WorldCom. The
complaint alleges that the MCI Merger would have the effect of substantially
lessening competition or tending to create a monopoly, and thereby violate
section 7 of the Clayton Act, with respect to the markets for Internet backbone
services, facilities to extend the reach of the Internet backbone, wholesale
and retail long distance services and international calling services. The
complaint requests declaratory and injunctive relief. At a scheduling
conference on July 10, 1998, the District Court set a trial date of May 10,
1999. On or about October 14, 1998, GTE filed an amended complaint seeking
declaratory and injunctive relief and damages, and on October 21, 1998, MCI and
WorldCom moved to dismiss the amended complaint in its entirety.

The Company believes that all of the complaints are without merit, and based on
information currently available, the Company presently does not expect that the
above actions will have a material adverse effect on the Company's consolidated
results of operations or financial position.

(L) RECLASSIFICATIONS

Revenues and line costs for prior periods reflect a classification change for
inbound international settlements which are now being treated as an offset to
line costs instead of revenues. Previously, both MCI and WorldCom classified
foreign post telephone and telegraph administration ("PTT") settlements on a
gross basis with the outbound settlement reflected as line cost expense and the
inbound settlement reflected as revenue. This change better reflects the way in
which the business is operated because the Company actually settles in cash
through a formal net settlement process that is inherent in the operating
agreements with foreign carriers.

                                    Page 22

<PAGE>   23

(M) RECENTLY ISSUED ACCOUNTING STANDARDS

In June 1998, the Financial Accounting Standards Board issued SFAS No. 133,
"Accounting for Derivative Instruments and Hedging Activities." This statement
establishes accounting and reporting standards requiring that every derivative
instrument (including certain derivative instruments embedded in other
contracts) be recorded in the balance sheet as either an asset or liability
measured at its fair value. This statement requires that changes in the
derivative's fair value be recognized currently in earnings unless specific
hedge accounting criteria are met. Special accounting for qualifying hedges
allows a derivative's gains and losses to offset related results on the hedged
item in the income statement, and requires a company to formally document,
designate and assess the effectiveness of transactions that receive hedge
accounting. This statement is effective for fiscal years beginning after
September 15, 1999, but may be implemented as of the beginning of any fiscal
quarter after issuance (that is, fiscal quarters beginning September 16, 1998
and thereafter). This statement cannot be applied retroactively. SFAS No. 133
must be applied to (a) derivative instruments and (b) certain derivative
instruments embedded in hybrid contracts that were issued, acquired, or
substantively modified after December 31, 1997 (and, at the Company's election,
before January 1, 1998).

The Company has not yet quantified the effects of adopting SFAS No. 133 on the
financial statements and has not determined the timing of or method of our
adoption of this statement. However, this statement could increase volatility in
earnings and other comprehensive income.

Item 2. Management's Discussion and Analysis of Financial Condition and Results
of Operations

This Management's Discussion and Analysis of Financial Condition and Results of
Operations may be deemed to include forward-looking statements within the
meaning of Section 27A of the Securities Act of 1933, as amended, and Section
21E of the Securities Exchange Act of 1934, as amended, that involve risk and
uncertainty, including financial, regulatory environment and trend projections
and the outcome of year 2000 efforts, as well as any statements preceded by,
followed by, or that include the words "intends," "estimates," "believes,"
"expects," "anticipates," "should," "could" or similar expressions, and other
statements contained herein regarding matters that are not historical facts.

Although the Company believes that its expectations are based on reasonable
assumptions, it can give no assurance that its expectations will be achieved.
The important factors that could cause actual results to differ materially from
those in the forward-looking statements herein (the "Cautionary Statements")
include, without limitation: (1) the Company's degree of financial leverage; (2)
risks associated with debt service requirements and interest rate fluctuations;
(3) risks associated with year 2000 uncertainties; (4) acquisitions and the
integration thereof; (5) risks of international business; (6) dependence on
availability of transmission facilities; (7) regulation risks including the 
impact of the Telecom Act; (8) contingent liabilities; (9) the impact of
competitive services and pricing; and (10) other risks referenced from time to
time in the Company's filings with the SEC, including the Company's Prospectus
Supplement dated August 7, 1998.

All subsequent written and oral forward-looking statements attributable to the
Company or persons acting on its behalf are expressly qualified in their
entirety by the Cautionary Statements. The Company does not undertake any
obligation to release publicly any revisions to such forward-looking statements
to reflect events or circumstances after the date hereof or to reflect the
occurrence of unanticipated events.

The following discussion and analysis relates to the financial condition and
results of operations of the Company for the three and nine month periods ended
September 30, 1998 and 1997 after giving effect to the BFP Merger, which was
accounted for as a pooling-of-interests. The information should be read in
conjunction with the restated consolidated financial statements and notes
thereto contained herein and in the Company's Current Report on Form 8-K dated
May 28, 1998 (filed May 28, 1998) and with Item 7 "Management's Discussion and
Analysis of Financial Condition and Results of Operations" contained in the
Company's Annual Report on Form 10-K for the year ended December 31, 1997.

Unless otherwise defined, capitalized terms used herein have the meanings
assigned to them in the Notes to Consolidated Financial Statements contained
herein.

                                    Page 23

<PAGE>   24

GENERAL

The Company is one of the largest telecommunications companies in the United
States, serving local, long distance and Internet customers domestically and
internationally. The Company's operations have grown significantly in each year
of its operations as a result of internal growth, the selective acquisition of
other telecommunications companies and international expansion.

On September 14, 1998, the Company, through a wholly owned subsidiary, merged
with MCI. Through the MCI Merger, the Company acquired one of the world's
largest and most advanced digital networks, connecting local markets in the
United States to more than 280 countries and locations worldwide.

As a result of the MCI Merger, each share of MCI common stock was converted into
the right to receive 1.2439 shares of MCI WorldCom Common Stock or approximately
755 million MCI WorldCom common shares in the aggregate, and each share of MCI
Class A common stock outstanding (all of which were held by BT) was converted
into the right to receive $51.00 in cash or approximately $7 billion in the
aggregate. The funds paid to BT were obtained by the Company from (i) available
cash as a result of the Company's $6.1 billion public debt offering in August
1998; (ii) the sale of MCI's iMCI Business to Cable & Wireless for $1.75 billion
in cash on September 14, 1998; (iii) the sale of MCI's 24.9% equity stake in
Concert to BT for $1 billion in cash on September 14, 1998; and (iv)
availability under the Company's New Credit Facilities and commercial paper
program. The MCI Merger was accounted for as a purchase; accordingly, operating
results for MCI have been included from the date of acquisition.

On August 4, 1998, MCI acquired a 51.79% voting interest and a 19.26% economic
interest in Embratel, Brazil's only facilities-based national communications
provider, for approximately $2.3 billion. The purchase price will be paid in
local currency installments of which $916 million was paid on August 4, 1998
with the remainder to be paid in two equal installments over the next two years.
Embratel provides interstate long distance and international telecommunications
services, as well as over 40 other communications services, including leased
high-speed data, satellite, Internet, frame and packet-switched services.
Operating results for Embratel are included from the date of the MCI Merger.

On January 31, 1998, MCI WorldCom, through a wholly owned subsidiary, merged
with CompuServe. As a result of the CompuServe Merger, each share of CompuServe
common stock was converted into the right to receive 0.40625 shares of MCI
WorldCom Common Stock, or approximately 37.6 million MCI WorldCom common shares
in the aggregate. Prior to the CompuServe Merger, CompuServe operated primarily
through two divisions: Interactive Services and Network Services. Interactive
Services offered worldwide online and Internet access services for consumers,
while Network Services provided worldwide network access, management and
applications, and Internet service to businesses. The CompuServe Merger was
accounted for as a purchase; accordingly, operating results for CompuServe have
been included from the date of acquisition.

On January 31, 1998, MCI WorldCom also acquired ANS from AOL, and has entered
into five year contracts with AOL under which MCI WorldCom and its subsidiaries
will provide network services to AOL. As part of the AOL Transaction, AOL
acquired CompuServe's Interactive Services Division and received a $175 million
cash payment from MCI WorldCom. MCI WorldCom retained the CNS division. ANS
provides Internet access to AOL and AOL's subscribers in the United States,
Canada, the United Kingdom, Sweden and Japan, and also designs, develops and
operates high performance wide-area networks for business, research, education
and governmental organizations. The AOL Transaction was accounted for as a
purchase, accordingly, operating results for ANS have been included from the
date of acquisition.

On January 29, 1998, MCI WorldCom, through a wholly owned subsidiary, merged
with BFP. BFP is a leading facilities-based provider of competitive local
telecommunications services, commonly referred to as a competitive local
exchange carrier, in selected cities within the United States. BFP acquires and
constructs its own state-of-the-art fiber optic networks and facilities and
leases network capacity from others to provide IXCs, ISPs, wireless carriers and
business, government and institutional end users with an alternative to the
ILECs for a broad array of high quality voice, data, video transport and other
telecommunications services.

As a result of the BFP Merger, each share of BFP common stock was converted into
the right to receive 1.85 shares of Common Stock or approximately 72.6 million
MCI WorldCom common shares in the aggregate. The BFP Merger was accounted for as
a pooling-of-interests and, accordingly, the Company's financial statements for
periods prior to the BFP

                                    Page 24

<PAGE>   25

Merger have been restated to include the results of BFP for all periods
presented.

The Company's strategy is to become a fully integrated communications company
that would be well positioned to take advantage of growth opportunities in 
global telecommunications. Consistent with this strategy, the Company believes 
that transactions such as the MCI Merger, the CompuServe Merger and the AOL
Transaction enhance the combined entity's opportunities for future growth,
create a stronger competitor in the changing telecommunications industry, allow
provision of end-to-end bundled service over global networks, and provide the
opportunity for significant cost savings and operating efficiencies for the
combined organization.

The Company's profitability is dependent upon, among other things, its ability
to achieve line costs that are less than its revenues. The principal components
of line costs are access charges and transport charges and the most significant
portion of the Company's line costs is access charges, which are highly
regulated. The FCC revised its rules regarding access charges in a manner that
will, over time, revamp the access rate element structure and, over the near
term, reduce the overall access revenues collected by the ILECs. The FCC's rate
element restructuring is intended to align costs with the manner in which they
are incurred by the ILECs. As a result, the usage based system has been replaced
with a system composed of a combination of flat rate charges and usage based
charges. The FCC has also implemented subsidy systems for local telephone
services and services to schools, libraries, and hospitals. The subsidy systems
will result in additional charges being placed on all telecommunications
providers, which charges may be directly recovered from the end users. In
addition, various state regulatory agencies are considering adoption of subsidy
systems that could cause rate adjustments to the access services obtained by the
Company and to retail rates. The Company cannot predict what effect continued
regulation and increased competition between LECs and other IXCs will have on
future access charges or the Company's business. However, the Company believes
that it will be able to continue to reduce transport costs through effective
utilization of its network, favorable contracts with carriers and network
efficiencies made possible as a result of expansion of the Company's customer
base by acquisitions and internal growth.

RESULTS OF OPERATIONS

The following table sets forth for the periods indicated the Company's statement
of operations as a percentage of its operating revenues.

<TABLE>
<CAPTION>
                                                                         For the Three Months          For the Nine Months
                                                                          Ended September 30,          Ended September 30,
                                                                         --------------------          -------------------
                                                                           1998          1997          1998           1997
                                                                          -----          ----          -----          ----
<S>                                                                       <C>            <C>           <C>            <C>
    Revenues......................................................          100%          100%           100%          100%

    Line costs....................................................         47.7          50.5           47.8          51.9
    Selling, general and administrative...........................         24.0          21.5           22.0          22.4
    Depreciation and amortization.................................         12.5          12.9           12.7          13.4
    In-process research and development and other charges.........         85.9            --           43.0            --
                                                                          -----          ----          -----          ----
    Operating income (loss).......................................        (70.0)         15.1          (25.5)         12.3
    Other income (expense):
        Interest expense..........................................         (3.8)         (5.3)          (4.1)         (5.4)
        Miscellaneous.............................................          0.4           0.6            0.4           0.6
                                                                          -----          ----          -----          ----
    Income (loss) before income taxes, minority interests and 
      extraordinary items.........................................        (73.4)         10.4          (29.2)          7.6
    Provision for income taxes....................................          4.6           6.4            5.3           4.9
                                                                          -----          ----          -----          ----
    Net income (loss) before, minority interests extraordinary 
      items.......................................................        (78.0)          4.0          (34.5)          2.7
    Minority interests............................................          0.3            --            0.1            --
    Extraordinary item............................................           --            --           (1.5)         (0.1)
    Distribution on subsidiary trust mandatorily
      redeemable preferred securities                                       0.1            --              -            --
    Preferred dividend requirement................................           --           0.4            0.2           0.4
                                                                          -----          ----          -----          ----
    Net income (loss) applicable to common shareholders...........        (78.4)%         3.6%         (36.3)%         2.3%
                                                                          =====          ====          =====          ====
</TABLE>

                                    Page 25

<PAGE>   26

THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1998 VS.
  THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1997

Revenues for the three months ended September 30, 1998 increased 97% to $3.8
billion as compared to $1.9 billion for the three months ended September 30,
1997. For the nine months ended September 30, 1998, revenues increased 61% to
$8.7 billion versus $5.4 billion for the same period of the prior year. The
increase in total revenues is attributable to the MCI Merger, the CompuServe
Merger and the AOL Transaction as well as internal growth. Results for the three
and nine month periods ended September 30, 1998 include 16 days of MCI and
Embratel operations. Prior year results have been restated to reflect the BFP
Merger, which was accounted for as a pooling-of-interests.

Actual reported revenues by category and associated revenue increases for the
three and nine months ended September 30, 1998 and 1997 reflect the following
increases by category (dollars in millions):

<TABLE>
<CAPTION>
                                     Three Months Ended September 30,              Nine months Ended September 30,
                                  --------------------------------------         -------------------------------------
                                   Actual          Actual        Percent         Actual          Actual        Percent
                                    1998            1997         Change           1998            1997         Change
                                  -------         -------        ------          -------       --------        ------
<S>                               <C>             <C>                 <C>        <C>           <C>                   <C>
REVENUES
  Voice                           $ 1,877         $ 1,028             83         $ 4,247       $  2,972              43
  Data                                735             419             75           1,768          1,160              52
  International                       301             195             54             802            515              56
  Embratel                            174              --            100             174             --             100
  Internet                            589             147            301           1,507            384             292
                                  -------         -------                        -------       --------
COMMUNICATION SERVICES              3,676           1,789            106           8,498          5,031              69
  Other                                82             122            (33)            163            333             (51)
                                  -------         -------                        -------       --------
TOTAL REVENUES                    $ 3,758         $ 1,911             97         $ 8,661       $  5,364              61
                                  =======         =======                        =======       ========
</TABLE>

The following table provides supplemental detail for MCI WorldCom revenues.
Since actual results only reflect 16 days of operations for MCI and Embratel,
the pro forma results are more indicative of internal growth for the combined
company. The pro forma revenue increases for the three and nine months ended
September 30, 1998 and 1997 reflect the following increases by category (dollars
in millions):

<TABLE>
<CAPTION>
                                       Three Months Ended September 30,             Nine months Ended September 30,
                                  ---------------------------------------       ----------------------------------------
                                  Pro Forma      Pro Forma        Percent       Pro Forma      Pro Forma        Percent
                                     1998             1997         Change          1998           1997           Change
                                   -------         -------        -------       --------       --------         -------
<S>                                <C>             <C>                   <C>    <C>            <C>                    <C>
REVENUES
  Voice                            $ 4,907         $ 4,462               10     $ 14,483       $ 13,291               9
  Data                               1,520           1,147               33        4,211          3,295              28
  International                        302             195               55          802            515              56
  Embratel                             930             507               83        2,422          1,510              60
  Internet                             589             343               72        1,588            917              73
                                   -------         -------                      --------       --------
COMMUNICATION SERVICES               8,248           6,654               24       23,506         19,528              20
  Other                                358             477              (25)       1,323          1,486             (11)
                                   -------         -------                      --------       --------
TOTAL REVENUES                     $ 8,606         $ 7,131               21     $ 24,829       $ 21,014              18
                                   =======         =======                      ========       ========
</TABLE>

Pro forma results for the prior periods reflect a classification change for
inbound international settlements which are now being treated as an offset to
line costs instead of revenues. Previously, both MCI and WorldCom classified
foreign PTT settlements on a gross basis with the outbound settlement reflected
as line cost expense and the inbound settlement reflected as revenue. This
change better reflects the way in which the business is operated because the
Company actually settles in cash through a formal net settlement process that is
inherent in the operating agreements with foreign carriers.

The following discusses the pro forma revenue increases for the three and nine
month periods ended September 30, 1998 as compared to pro forma revenues for
the comparable prior year periods. The pro forma revenues assume that the MCI
Merger, CompuServe Merger and the AOL Transaction occurred at the beginning of
1997. Changes in actual revenues are shown in the Consolidated Statements of
Operations and the foregoing tables and, as noted above, primarily reflect the
MCI Merger, CompuServe Merger, AOL Transaction and the internal growth of the
Company.

                                    Page 26




<PAGE>   27
Voice (formerly domestic switched) revenues for the third quarter experienced a
10% pro forma year-over-year increase driven by a gain of 15% in traffic. For
the nine month period ended September 30, 1998, voice revenues increased 9% over
the prior year pro forma amount on a 17% increase in traffic. Strong long
distance volume gains in domestic commercial sales channels, combined with an
increasing mix of local services, were the primary contributors to this
increase. Local voice revenues grew 87% in the third quarter of 1998 versus the
same period of the prior year. For the nine months ended September 30, 1998
local voice revenues experienced a 97% pro forma year over year increase. Voice
revenues include both long distance and local domestic switched revenues. While
the Company continues to show significant percentage gains in switched local, it
is still a relatively small component of total Company revenues.

Pro forma data (formerly domestic private line) revenues for the three and nine
month periods ended September 30, 1998 increased 33% and 28%, respectively. The
revenue growth for data services continues to be driven by significant
commercial end-user demand for high-speed data and by Internet-related growth on
both a local and long-haul basis. This growth is not only being fueled by
connectivity demands, but applications are becoming more strategic, far reaching
and complex; additionally, bandwidth consumption is driving an acceleration in
growth for higher capacity circuits. Data includes both long distance and local
dedicated bandwidth sales. Rapidly growing demand for high-speed data access as
well as data transport has contributed to a 43% pro forma year over year local
data revenue growth for the third quarter of 1998 and a 46% pro forma year over
year increase for the nine month period. As of September 30, 1998, the Company
had approximately 16 million domestic local voice grade equivalents and
approximately 38,000 buildings connected over its high-capacity circuits. Local
route miles of connected fiber are in excess of 8,000 and domestic long distance
route miles are in excess of 45,000.

Pro forma International revenues - those revenues originating outside of the
United States - for the third quarter of 1998 were $302 million, an increase of
55% as compared with $195 million for the same pro forma period of the prior
year. For the nine month period ended September 30, 1998, pro forma
international revenues increased 56% to $802 million versus $515 million for the
same pro forma period of the prior year. In July 1998, the pan-European network
was commissioned for service and now provides MCI WorldCom the capability to
connect from end-to-end over 5,000 buildings in Europe with over 33,000
buildings in the U.S. - all over its own high-capacity circuits. In Europe, the
Company has over 900 route miles of local fiber and over 1,700 long distance
route miles. Additionally, plans were announced to build national networks in
the United Kingdom, France and Germany.

Pro Forma Embratel revenues increased to $930 million for the three months ended
September 30, 1998 versus $507 million for the same period of the prior year.
For the nine months ended September 30, 1998 revenues increased to $2.4 billion
from $1.5 billion in the same period of the prior year. These increases
principally reflect the implementation of a new interconnection regime among
Embratel and Brazil's three regional fixed-line operators, effective April 1,
1998. Under this new regime, Embratel has begun receiving remittances from the
fixed-line operators for switched services provided to end-customers. Embratel
has also begun paying interconnection charges associated with this service to
the regional fixed-line operators. In addition to such charges, Embratel is
required to pay a supplemental per-minute charge for interconnection through
June 30, 2001. The publicly stated intent of the new regime was to minimally
impact the profitability of Embratel and the three fixed-line operators.
Embratel results are consolidated with those of the Company due to the Company's
51.79% voting interest and 19.26% economic interest in Embratel.

Pro forma Internet revenues for the three and nine month periods ended September
30, 1998 increased 72% and 73%, respectively, over the prior year pro forma
amounts. Growth is being driven by both dial up and dedicated connectivity to
the Internet as more and more business customers migrate their data networks and
applications to Internet-based technologies. Additionally, Internet revenues
growth is partially attributable to the acquired customer contract for which
profit margins have been reflected at market rates as of the date of
acquisition. The remaining term of the acquired contract and associated
amortization to reflect market rates is 52 months. MCI's Internet revenues
have been excluded from the above table, due to the divestiture of the iMCI
Business on September 14, 1998.

Pro forma other revenues for the third quarter of 1998 were $358 million, down
25% as compared with the pro forma third quarter of 1997. For the nine month
period ended September 30, 1998, pro forma other revenues decreased 11% to $1.3
billion versus $1.5 billion for the same pro forma period of the prior year. The
year over year decline reflects the negative impact of eliminating certain lines
of operation and the Canadian currency translation effects.

The following discusses the results of operations for the three and nine months 
ended September 30, 1998, as compared to the comparable prior year periods.

Line costs as a percentage of revenues for the third quarter of 1998 were 47.7%
as compared to 50.5% reported for the same period of the prior year. On a
year-to-date basis, line costs as a percentage of revenues decreased to 47.8% as
compared to 51.9% reported for the same period of the prior year. Line costs for
the three and nine month periods ended September 30, 1998 include a $37 million
one-time merger-related charge for unfavorable contracts. Overall decreases are
attributable to changes in the product mix and synergies and economies of scale
resulting from network efficiencies achieved from the assimilation of CNS and
ANS into the Company's operations and were offset in part by universal service
fund costs recorded for the first nine months of 1998. Additionally, access
charge reductions beginning in July 1997 reduced total line cost expense by
approximately $84 million for the first nine months in 1998. While access 

                                    Page 27


<PAGE>   28

charge reductions were primarily passed through to the customer, line costs as
a percentage of revenues was positively affected by more than half a percentage
point for both the three and nine months ended September 30, 1998. The Company
anticipates that line costs as a percentage of revenues will continue to
decline as a result of synergies and economies of scale resulting from network
efficiencies achieved from the assimilation of MCI, CNS, ANS and BFP into the
Company's operations. Additionally, local revenues are increasing rapidly and
line costs related to local are primarily fixed in nature - leading to lower
line costs as a percentage of revenues.

Selling, general and administrative expenses for the third quarter of 1998 were
$902 million or 24.0% of revenues as compared to $411 million or 21.5% of
revenues for the third quarter of 1997. For the nine months ended September 30,
1998, this expense was $1.9 billion or 22.0% of revenues compared to the $1.2
billion or 22.4% of revenues for 1997. The increase in selling, general and
administrative expenses as a percentage of revenues for the three month period
ended September 30, 1998 includes MCI for 16 days and reflects the Company's
expanding operations, primarily through the MCI Merger. The increase is also
attributable to a one-time merger-related charge of $21 million for the
adjustment of certain asset carrying values. The Company's goal is to achieve
additional selling, general and administrative synergies in connection with the
MCI Merger as the result of the assimilation of MCI into the Company's strategy
of cost control.

Depreciation and amortization expense for the third quarter of 1998 increased to
$469 million or 12.5% of revenues from $247 million or 12.9% of revenues for the
third quarter of 1997. On a year-to-date basis, this expense increased to $1.1
billion or 12.7% of revenues from $719 million or 13.4% of revenues for the
comparable 1997 period. These increases reflect increased amortization
associated with the MCI Merger, CompuServe Merger and AOL Transaction and
additional depreciation related to capital expenditures. As a percentage of
revenues, these costs decreased due to the higher revenue base.

In the first quarter of 1998 the Company recorded a pre-tax charge of $69 
million for employee severance, alignment charges and direct merger costs 
associated with the BFP Merger. Additionally, in the third quarter of 1998, the 
Company recorded a pre-tax charge of $127 million primarily in connection with 
the MCI Merger. The third quarter charge included severance costs associated 
with the termination of certain employees which is expected to be completed by 
the first quarter of 1999. Also included are alignment charges, and other exit 
activities which include the costs of consolidating and closing facilities, 
loss on sale or write down of assets and conformance of accounting principles. 
(See Note E)

In connection with recent business combinations, the Company made allocations of
the purchase price to acquired in-process technology totaling $429 million in
the first quarter of 1998 related to the CompuServe Merger and AOL Transaction
and $3.1 billion in the third quarter of 1998 related to the MCI Merger (See
Note E).

Interest expense in the third quarter of 1998 was $141 million or 3.8% of
revenues, as compared to $102 million or 5.3% of revenues reported in the third
quarter of 1997. For the nine months ended September 30, 1998, interest expense
was $351 million or 4.1% of revenues, as compared to $289 million or 5.4% of
revenues for the first nine months of 1997. The increase in interest expense is
attributable to higher debt levels as the result of higher capital expenditures,
the 1997 and 1998 fixed rate debt financings and the MCI Merger, offset by lower
interest rates as a result of the Tender Offers, the 1998 fixed rate debt
financings and slightly lower rates in effect on the Company's variable rate
long-term debt. For the three months ended September 30, 1998 and 1997, weighted
average annual interest rates on the Company's long-term debt were 7.03% and
7.99%, respectively, while weighted average annual levels of borrowings were
$11.9 billion and $6.0 billion, respectively. For the nine months ended
September 30, 1998 and 1997, weighted average annual interest rates on the
Company's total long-term debt were 7.12% and 7.75%, respectively, while
weighted average annual levels of borrowing were $9.74 billion, and $5.61
billion, respectively.

The Company recorded a tax provision of $174 million and $462 million,
respectively, for the three and nine month periods ended September 30, 1998 on a
pretax loss of $2.76 billion and $2.52 billion, respectively. Although the
Company generated a consolidated pre-tax loss for the three and nine months
ended September 30, 1998, permanent non-deductible items aggregating
approximately $3.2 billion and $3.8 billion, respectively, resulted in the
recognition of taxable income. Included in the permanent non-deductible items
was the $3.53 billion charge for in-process research and development related to
the MCI Merger, CompuServe Merger and AOL Transaction.

In the first quarter of 1998, the Company recorded an extraordinary item
totaling $128.7 million, net of income tax benefit of $77.6 million. The charge
was recorded in connection with the Tender Offers and related refinancings of
outstanding debt of BFP discussed below. In the second quarter of 1997 the
Company recognized an extraordinary loss of $2.9 million related to the early
extinguishment of secured indebtedness.

For the quarter ended September 30, 1998, the Company reported a net loss of
$2.9 billion as compared to net income of $69 million reported in the third
quarter of 1997. Diluted loss per common share was $2.44 compared to diluted
earnings per common share of $0.07 per share for the comparable 1997 period.

                                    Page 28

<PAGE>   29

For the nine months ended September 30, 1998, the Company reported a net loss of
$3.1 billion or $2.89 per share compared to net income of $122 million or $0.12
per share for the prior year period.

LIQUIDITY AND CAPITAL RESOURCES

As of September 30, 1998, the Company's total debt was $20.27 billion, an
increase of $12.85 billion from December 31, 1997 primarily due to the
acquisition of MCI debt, including Embratel debt and the related cost to
finance the Embratel investment, financing of the approximately $7 billion
payment to BT and increased capital expenditures.

In connection with the BFP Merger, the Company announced in February 1998 that
it had commenced the Tender Offers to purchase for cash various series of
outstanding BFP Notes. Concurrently with the Tender Offers, MCI WorldCom
obtained the requisite consents to eliminate certain restrictive covenants and
amend certain other provisions of the respective indentures of the BFP Notes.
In March 1998, the Company accepted all BFP Notes validly tendered. As of the
expiration of the Tender Offers, MCI WorldCom had received valid tenders and
consents from holders of approximately $1.1 billion of BFP Notes (over 99% of
total outstanding). The funds required to pay all amounts required under the
Tender Offers were obtained by MCI WorldCom from available working capital and
lines of credit. In connection with the Tender Offers and related refinancings,
MCI WorldCom recorded an extraordinary item of $128.7 million, net of income
tax benefit of $77.6 million in the first quarter of 1998.

On August 6, 1998, MCI WorldCom replaced its Old Credit Facilities with $12.0
billion in New Credit Facilities consisting of $3.75 billion of Facility A
Loans, $1.25 billion of Facility B Loans and $7 billion of Facility C Loans.
The New Credit Facilities provide liquidity support for the Company's
commercial paper program and will be used for other general corporate purposes.
The Facility A Loans and the Facility B Loans mature on June 30, 2002. The
Facility C Loans have a 364-day term, which may be extended for up to two
successive 364-day terms thereafter to the extent of the committed amounts from
those lenders consenting thereto, with a requirement that lenders holding at
least 51% of the committed amounts consent. Additionally, effective as of the
end of such 364-day term, the Company may elect to convert up to $4 billion of
the principal debt outstanding under the Facility C Loans from revolving loans
to term loans with a maturity date no later than one year after the conversion.
The New Credit Facilities bear interest payable in varying periods, depending
on the interest period, not to exceed six months, or with respect to any
Eurodollar Rate borrowing, 12 months if available to all lenders, at rates
selected by the Company under the terms of the New Credit Facilities, including
a Base Rate or Eurodollar Rate, plus the applicable margin. The applicable
margin for the Eurodollar Rate borrowing varies from 0.35% to 0.75% as to
Facility A Loans and Facility B Loans and from 0.225% to 0.450% as to Facility
C Loans, in each case based upon the better of certain debt ratings. The New
Credit Facilities are unsecured but include a negative pledge of the assets of
the Company and its subsidiaries (subject to certain exceptions). The New
Credit Facilities require compliance with a financial covenant based on the
ratio of total debt to total capitalization, calculated on a consolidated
basis. The New Credit Facilities require compliance with certain operating
covenants which limit, among other things, the incurrence of additional
indebtedness by the Company and its subsidiaries, sales of assets and mergers
and dissolutions, which covenants are generally less restrictive than those
contained in the Old Credit Facilities and which do not restrict distributions
to shareholders, provided the Company is not in default under the New Credit
Facilities. The Facility A Loans and the Facility C Loans are subject to annual
commitment fees not to exceed 0.25% and 0.12%, respectively, of any unborrowed
portion of the facilities.

Subsequent to September 30, 1998, the Company elected to repay the Facility B
Loans and cancel the facility commitment of $1.25 billion. The funds used to
repay Facility B Loans were obtained by the Company from availability under the
Company's New Credit Facilities and commercial paper program.

The Company approved the issuance of commercial paper notes in the aggregate
principal amount not to exceed $10.0 billion, which notes have a maturity not
to exceed 364 days from the date of issuance. The Company maintains unused
credit facilities equal to 100% of the commercial paper notes outstanding. At
September 30, 1998, $2.74 billion was outstanding under the commercial paper
program.

As of September 30, 1998, the Company had available liquidity of $8.96 billion
under its New Credit Facilities and

                                    Page 29

<PAGE>   30

commercial paper program and from available cash. After the Facility B Loans
were repaid, available liquidity was reduced by $1.25 billion.

On August 11, 1998, the Company completed a public debt offering of $6.1 billion
principal amount of debt securities with interest rates ranging from 6.125% to
6.95% and maturing from August 2001 to August 2028. The net proceeds of $6.04
billion were used to pay down commercial bank debt, finance the approximately $7
billion payment to BT and for general corporate purposes. The notes bear
interest payable semiannually in arrears on February 15 and August 15 of each
year, commencing February 15, 1999.

The Notes are redeemable, as a whole or in part, at the option of the Company,
at any time or from time to time, at respective redemption prices equal to the
greater of (i) 100% of the principal amount of the Notes to be redeemed or (ii)
the sum of the present values of the Remaining Scheduled Payments (as defined
therein) plus (a) 10 basis points for the Notes Due 2001, (b) 15 basis points
for the Notes Due 2003 and the Notes Due 2005, or (c) 20
basis points for the Notes Due 2028, plus in the case of each of clause (i) and
(ii) accrued interest to the date of redemption.

At the time of the MCI Merger, MCI had outstanding $1.44 billion of MCI Senior
Debentures with rates ranging from 7.125% to 8.25% and maturing from January
2023 through June 2027, and $2.66 billion of MCI Senior Notes with rates ranging
from 6.125% to 7.5% and maturing from March 1999 through April 2012.
Additionally, MCI had outstanding a $1.34 billion note payable in annual local
currency installments over the next two years as a result of MCI's purchase of
Embratel on August 4, 1998, and other debt including, without limitation,
capital leases.

In connection with the MCI Merger, the Company also acquired $750 million
aggregate principal amount of 8% Cumulative Quarterly Income Preferred
Securities, Series A, representing 30 million shares outstanding (preferred
securities) due June 30, 2026 which were previously issued by the Trust. The
Trust exists for the sole purpose of issuing the preferred securities and
investing the proceeds in the Company's Subordinated Debt Securities due June
30, 2026, the only assets of the Trust.

For the nine months ended September 30, 1998, the Company's cash flow from
operations was $1.48 billion, increasing 57% from $944 million in the comparable
period for 1997. The increase in cash flow from operations was primarily
attributable to internal growth and synergies and economies of scale resulting
from network efficiencies and selling, general and administrative cost savings
achieved from the assimilation of recent acquisitions into the Company's
operations.

In 1998, the Company's existing receivables purchase agreement generated
additional proceeds of $72 million, bringing the total amount outstanding to
$489 million. The Company used these proceeds to reduce outstanding debt under
the Company's existing credit facilities. As of September 30, 1998, the
purchaser owned an undivided interest in a $1.2 billion pool of receivables.

Cash used in investing activities for the nine months ended September 30, 1998
totaled $6.79 billion and included capital expenditures of $3.27 billion and
acquisition and related costs of $3.05 billion. Primary capital expenditures
include purchases of switching, transmission, communication and other equipment.
The Company anticipates that approximately $1.9 billion will be spent during the
remainder of 1998 for transmission and communications equipment, construction
and other capital expenditures. Acquisition and related costs includes the costs
associated with the MCI Merger, CompuServe Merger and AOL Transaction.

Included in cash flows from financing activities are payments of $12.7 million
for the Series A Preferred Stock dividend and $0.7 million for the Series B
preferred dividend requirements. The Company has never paid cash dividends on
its Common Stock. Dividends on the Series B Convertible Preferred Stock of MCI
WorldCom ("MCI WorldCom Series B Preferred Stock") accrue at the rate per share
of $0.0775 per annum and are payable in cash. Dividends will be paid only when,
as and if declared by the Board of Directors of the Company. The Company
anticipates that dividends on the MCI WorldCom Series B Preferred Stock will not
be declared but will continue to accrue. Upon conversion, accrued but unpaid
dividends are payable in cash or shares of MCI WorldCom Common Stock at the
Company's election.

In May 1998, the Company exercised its option to redeem all of the outstanding
Series A Preferred Stock and related Depositary Shares. Prior to the redemption
date, substantially all of the holders of Series A Preferred Stock elected to
convert the preferred stock into Common Stock, resulting in the issuance of
approximately 32.7 million shares of Common Stock.

                                    Page 30

<PAGE>   31
In connection with the MCI Merger, MCI WorldCom paid BT $51.00 in cash without
interest for each of the shares of MCI Class A Common Stock it owned, or
approximately $7 billion in the aggregate. Additionally, MCI WorldCom paid BT a
fee of $465 million to induce BT to terminate the previously signed BT/MCI
Merger Agreement and to enter into the BT Agreement. MCI WorldCom funded the
commitment through a combination of available cash from the August 1998 public
debt offering and proceeds from the sale of the iMCI Business and MCI's
investment in Concert and availability unde the Company's New Credit Facilities
and commercial paper program.

Increases in interest rates on MCI WorldCom's variable rate debt would have an
adverse effect upon MCI WorldCom's reported net income and cash flow. MCI
WorldCom believes that the combined operations of MCI WorldCom, CNS, ANS, and
MCI will generate sufficient cash flow to service MCI WorldCom's debt and
capital requirements; however, economic downturns, increased interest rates and
other adverse developments, including factors beyond MCI WorldCom's control,
could impair its ability to service its indebtedness. In addition, the cash flow
required to service MCI WorldCom's debt may reduce its ability to fund internal
growth, additional acquisitions and capital improvements.

The development of the businesses of MCI WorldCom and the installation and
expansion of its domestic and international networks will continue to require
significant capital expenditures. Failure to have access to sufficient funds for
capital expenditures on acceptable terms or the failure to achieve capital
expenditure synergies may require MCI WorldCom to delay or abandon some of its
plans, which could have a material adverse effect on the success of MCI
WorldCom. The Company has historically utilized a combination of cash flow from
operations and debt to finance capital expenditures and a mixture of cash flow,
debt and stock to finance acquisitions. The Company expects to experience
increased capital intensity due to network expansion and merger related expenses
as noted above and believes that funding needs in excess of internally generated
cash flow and the Company's New Credit Facilities and commercial paper program
will be met by accessing the debt markets.

The Company believes that MCI WorldCom, following the MCI Merger, CompuServe
Merger and the AOL Transaction will generate sufficient cash flow to adequately
fund the capital requirements of these businesses. As a result of the MCI
Merger, the CompuServe Merger and the AOL Transaction, the Company believes that
the operating and capital synergies from the integration of these acquisitions
into MCI WorldCom's operations will further enhance the cash flow contribution
for the Company.

Absent significant capital requirements for other acquisitions, the Company
believes that cash flow from operations and available liquidity, including the
Company's New Credit Facilities and commercial paper program and available cash
will be more than adequate to meet the Company's capital needs for the remainder
of 1998.

 RECENTLY ISSUED ACCOUNTING STANDARDS

In June 1998, the Financial Accounting Standards Board issued SFAS No. 133,
"Accounting for Derivative Instruments and Hedging Activities." This statement
establishes accounting and reporting standards requiring that every derivative
instrument (including certain derivative instruments embedded in other
contracts) be recorded in the balance sheet as either an asset or liability
measured at its fair value. This statement requires that changes in the
derivative's fair value be recognized currently in earnings unless specific
hedge accounting criteria are met. Special accounting for qualifying hedges
allows a derivative's gains and losses to offset related results on the hedged
item in the income statement, and requires a company to formally document,
designate and assess the effectiveness of transactions that receive hedge
accounting. This statement is effective for fiscal years beginning after
September 15, 1999, but may be implemented as of the beginning of any fiscal
quarter after issuance (that is, fiscal quarters beginning September 16, 1998
and thereafter). This statement cannot be applied retroactively. SFAS No. 133
must be applied to (a) derivative instruments and (b) certain derivative
instruments embedded in hybrid contracts that were issued, acquired, or
substantively modified after December 31, 1997 (and, at the Company's election,
before January 1, 1998).

The Company has not yet quantified the effects of adopting SFAS No. 133 on the
financial statements and has not determined the timing of or method of our
adoption of this statement. However, this statement could increase volatility in
earnings and other comprehensive income.

                                    Page 31

<PAGE>   32

Year 2000 Readiness Disclosure

Due to their extensive use of computer technology, both MCI and WorldCom began
developing strategic plans in 1996 to address their respective year 2000 issues.
Since the MCI Merger, the Company has been melding these strategies. The
Company's year 2000 compliance plan is an ongoing program in which remediation
strategies are being implemented by the Company's business organizations to
address noncompliant computer and network systems and technology. The Company
has a central organization that has overall responsibility for coordinating the
implementation of this strategy.

The remediation strategies followed by the Company's business organizations
generally involve a sequence of steps that include (i) identifying computer
hardware, software and network components and equipment potentially impacted by
year 2000 problems; (ii) analyzing the date sensitivity of those elements; (iii)
developing plans for remediation where necessary; (iv) converting non-compliant
code or equipment (or, in some cases, replacing or decommissioning systems); (v)
testing, and (vi) deploying and monitoring remediation solutions. These steps
will vary to meet the particular needs of a business organization and, in some
cases, will overlap. Testing, for example, may be performed at several stages of
the remediation process.

The Company has substantially completed its efforts to identify and assess year
2000 computer issues, and its business organizations are in the process of
developing remediation plans, converting noncompliant code or equipment, and
replacing or decommissioning systems, and testing. The Company has targeted year
2000 compliance for the majority of its mission-critical systems, including
network and customer interfacing systems, on or before March 31, 1999. The
remaining mission-critical systems, and non-mission critical systems, are
targeted for compliance by June 30, 1999, with full deployment of the
remediation solutions throughout the Company's network targeted for no later
than September 30, 1999.

As part of its year 2000 plan, the Company is seeking confirmation from its
domestic and foreign interconnecting carriers (collectively, the
"Interconnecting Carriers") and major communications equipment vendors (the
"Primary Vendors") that they are developing and implementing plans to become
year 2000 compliant. The Company has contacted these carriers and vendors, and
will continue to do so, but has not yet received enough information from certain
domestic and foreign carriers to assess their year 2000 readiness. The Company
has received information from its Primary Vendors regarding their year 2000
readiness. This information indicates the Primary Vendors have documented plans
to become year 2000 compliant. Like all major telecommunication carriers, the
Company's ability to provide service is dependent on its Interconnecting
Carriers and Primary Vendors.

The Company intends to prepare contingency plans to address potential year 2000
related business interruptions that may occur on January 1, 2000 or thereafter.
The Company anticipates that these contingency plans will primarily address
potential year 2000 problems due to failures to remediate major systems
successfully, and potential failure of the Company's Interconnecting Carriers'
and Primary Vendors' year 2000 compliance efforts. The Company plans to complete
preparation and implementation of its contingency plans by December 31, 1999.
Failure to meet this target could materially impact the Company's operations.

To achieve its year 2000 compliance plan, the Company is utilizing both internal
and external resources to identify, correct or reprogram, and test its systems
for year 2000 compliance. The Company expects to incur internal labor as well as
consulting and other expenses related to infrastructure and facilities
enhancements necessary to prepare its systems for the year 2000. The Company's
use of internal resources to achieve its year 2000 compliance plan has not had a
material adverse effect on its ability to develop new products and services or
to maintain and upgrade, if necessary, its existing products and services.

The year 2000 costs incurred by the MCI and WorldCom for the nine months ended
September 30, 1998, which have been included in selling, general and
administrative expenses for that period, were approximately $116 million. This
level of expenditures is consistent with the planned expenditures for the
period. The Company expects to incur approximately $384 million in expenses over
the next five quarters to support its year 2000 compliance initiatives. The
costs of the Company's year 2000 remediation efforts are based upon management's
best estimates, which require assumptions about future events, availability of
resources and personnel, third-party remediation actions, and other factors.
There are no assurances that these estimates will be

                                    Page 32

<PAGE>   33

accurate, and actual amounts may differ materially based on a number of factors,
including the availability and cost of resources to undertake remediation
activities and the scope and nature of the work required to complete
remediation.

Due to the inherent uncertainties concerning year 2000 remediation efforts, and
the potential impact of actions by third parties, the Company cannot predict its
most reasonably likely worst case scenario. The failure to correct a material
year 2000 problem could result in an interruption in, or a failure of, normal
business activities and operations. Such failures could materially and adversely
affect the Company's results of operations, liquidity and financial condition.
The Company is unable to determine at this time whether the consequences of year
2000 failures will have a material impact on the Company's results of
operations, liquidity or financial condition due to the general uncertainty
inherent in the year 2000 problem, resulting in part from the uncertainty of the
year 2000 readiness of its Interconnecting Carriers and Primary Vendors, and
other suppliers, as well as uncertainties related to the Company's ongoing
remediation program. The Company's year 2000 compliance plan is expected to
reduce significantly the Company's level of uncertainty about the year 2000
problem and, in particular, about the year 2000 compliance and readiness of its
Interconnecting Carriers and Primary Vendors. The Company believes that, with
the implementation of new business systems, its Interconnecting Carriers and
Primary Vendors year 2000 readiness, and completion of the year 2000 compliance
plan as scheduled, it will maintain normal operations.

Statements concerning year 2000 issues which contain more than historical
information may be considered forward-looking statements (as that term is
defined in the Private Securities Litigation Reform Act of 1995), which are
subject to risks and uncertainties. Actual results may differ materially from
those expressed in the forward-looking statements, and readers are cautioned
that the Company's year 2000 discussion should be read in conjunction with the
company's statement on forward-looking statements which appears at the beginning
of this Item 2. Management's Discussion and Analysis of Financial Condition and
Results of Operations.

EURO CONVERSION

On January 1, 1999, certain member countries of the European Union are scheduled
to establish fixed conversion rates between their existing currencies and the
European Union's common currency ("Euro"). The transition period for the
introduction of the Euro will be between January 1, 1999 to December 31, 2000.
All of the final rules and regulations have not yet been identified by the
European Commission with regard to the Euro. The Company is currently evaluating
methods to address the many issues involved with the introduction of the Euro,
including the conversion of information technology systems, recalculating
currency risk, recalibrating derivatives and other financial instruments,
strategies concerning continuity of contracts, and impacts on the processes for
preparing taxation and accounting records. At this time, the Company has not yet
determined the cost related to addressing this issue and there can be no
assurance as to the effect of the Euro on the consolidated financial
statements.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

The Company believes its market risk exposure with regard to its marketable
equity securities is limited to changes in quoted market prices for such
securities. Based upon the composition of the Company's marketable equity
securities at September 30, 1998, the Company does not believe a hypothetical 10
percent adverse change in quoted market prices would be material to net income.

The Company's policy is to manage interest rates through the use of a
combination of fixed and variable rate debt. Currently, the Company does not use
derivative financial instruments to manage its interest rate risk. The Company
has minimal cash flow exposure due to general interest rate changes for its
fixed rate, long-term debt obligations. The Company does not believe a
hypothetical 10% adverse change in the Company's variable rate debt obligations
would be material to the Company's results of operations.

Although the Company conducts business in foreign countries, foreign currency
transaction gains and losses were not material to the Company's results of
operations for the nine months ended September 30, 1998. Accordingly, the
Company was not subject to material foreign currency exchange rate risk from the
effects that exchange rate movements of foreign currencies would have on the
Company's future costs or on future cash flows it would receive from its foreign
subsidiaries. To date, the Company has not entered into any significant foreign
currency forward exchange contracts or other derivative financial instruments to
hedge the effects of adverse fluctuations in foreign currency exchange rates.
The Company is evaluating the future use of such financial instruments as well
as the effect of the Euro conversion, described above, on the Company's
operations.

                                    Page 33

<PAGE>   34

PART II.   OTHER INFORMATION

Item 1.    Legal Proceedings

           There have been no material changes in the legal proceedings reported
           in the Company's Annual Report on Form 10-K for the year ended
           December 31, 1997, except as may be reflected in the discussion under
           Note K of the Notes to Consolidated Financial Statements in Part I,
           Item 1, above.

Item 2.    Changes in Securities and Use of Proceeds

           In connection with the MCI Merger, the Company and MCI have executed
           certain agreements constituting a full, irrevocable and unconditional
           guarantee by the Company and MCI of all of the obligations of MCI
           Capital I, a wholly-owned Delaware statutory business trust, with
           respect to its 8% Cumulative Quarterly Income Preferred Securities,
           Series A. See Note G of the Notes to Consolidated Financial
           Statements contained in Part I, Item 1, above.

Item 3.    Defaults upon Senior Securities

           None

Item 4.    Submission of Matters to a Vote of Securities Holders

           None

Item 5.    Other Information

           In September 1998, the Company amended and restated its Bylaws to,
           among other things, adopt advance notice provisions relating to
           proposals of business and nominations of directors at meetings of
           shareholders. The amended and restated Bylaws were described in and
           filed as an exhibit to the Company's Current Report on Form 8-K dated
           September 14, 1998 (filed September 29, 1998).

Item 6.    Exhibits and Reports on Form 8-K

           A.   Exhibits

                See Exhibit Index

           B.   Reports on Form 8-K

                (i) Current Report on Form 8-K dated September 14, 1998 (filed
                    September 29, 1998) reporting under Item 2, Acquisition or
                    Disposition of Assets, among other things, information
                    related to the MCI Merger, and the Company's amended and
                    restated Bylaws to, among other things, adopt advance notice
                    provisions relating to proposals of business and nominations
                    of directors at meetings of shareholders and under Item
                    7(a), Financial Statements of Businesses Acquired, the
                    following financial statements:

                             MCI Communications Corporation and Subsidiaries -
                             for the three and six month periods ended June 30,
                             1997 and 1998 (unaudited)

                             Consolidated Income Statements
                             Consolidated Balance Sheets
                             Consolidated Statements of Cash Flows
                             Consolidated Statements of Stockholders' Equity
                             Notes to Interim Condensed Consolidated Financial
                                     Statements
                             Management's Discussion and Analysis of Financial
                                     Condition and Results of Operations

                                    Page 34

<PAGE>   35

                (ii)     Current Report on Form 8-K dated July 23, 1998 (filed
                         July 24, 1998), reporting under Item 5, Other Events,
                         certain portions of WorldCom's second quarter 1998
                         press release

                (iii)    Current Report on Form 8-K dated August 4, 1998
                         (filed August 4, 1998), reporting under Item 5, Other
                         Events, among other things, information regarding MCI's
                         announcement that it had entered into a letter
                         agreement with Cable & Wireless to sell the iMCI
                         Business, WorldCom's announcement of negotiations for
                         the New Credit Facilities and certain portions of MCI's
                         second quarter 1998 press release.

                (iv)     Current Report on Form 8-K dated August 6,
                         1998 (filed August 6, 1998) reporting under Item 5,
                         Other Events, among other things, certain
                         information regarding the MCI Merger and under Item
                         7(b), Pro Forma Information, the following financial
                         information:

                             WorldCom, Inc. - For the three months ended March
                                    31, 1998 and for the fiscal year ended
                                    December 31, 1997:

                                       Pro Forma Condensed Combined Financial
                                           Statements
                                       Pro Forma Condensed Combined Balance
                                           Sheet as of March 31, 1998
                                       Pro Forma Condensed Combined Statement of
                                           Operations for the three months ended
                                           March 31, 1998
                                       Pro Forma Condensed Combined Statement of
                                           Operations for the year ended
                                           December 31, 1997
                                       Notes to Pro Forma Condensed Combined
                                           Financial Statements

                (v)      Current Report on Form 8-K dated August 6, 1998 (filed
                         August 7, 1998), reporting under Item 5, Other Events,
                         information regarding the Company's $6.1 billion public
                         debt offer in August 1998 and the New Credit
                         Facilities.

                                    Page 35

<PAGE>   36



                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report on Form 10-Q to be signed on its behalf
by Scott D. Sullivan, thereunto duly authorized to sign on behalf of the
registrant and as the principal financial officer thereof.


                                       MCI WORLDCOM, INC.



                                       By: /s/ SCOTT D. SULLIVAN
                                          --------------------------------
                                          Scott D. Sullivan
Dated: November 16, 1998                  Chief Financial Officer

                                    Page 36

<PAGE>   37



                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit No.                   Description
- -----------                   -----------

<S>               <C>
  1.1             Underwriting Agreement dated August 6, 1998, between WorldCom, Inc. ("WorldCom") and Salomon Brothers Inc and the
                  other firms named therein, acting severally on behalf of themselves as Managers and Underwriters and on behalf of
                  the other several Underwriters, if any, named in the Terms Agreement (incorporated herein by reference to Exhibit
                  1.1 to the Company's Current Report on Form 8-K dated August 6, 1998 (filed August 7, 1998) (File No. 0-11258))

  1.2             Terms Agreement, dated August 6, 1998, between WorldCom, and Salomon Brothers Inc and the other firms named
                  therein, acting severally on behalf of themselves as Managers and Underwriters and on behalf of the other several
                  Underwriters named therein (incorporated herein by reference to Exhibit 1.2 to the Company's Current Report on
                  Form 8-K dated August 6, 1998 (filed August 7, 1998) (File No. 0-11258))

  2.1             Agreement and Plan of Merger dated as of November 9, 1997 among WorldCom, TC Investments Corp. and MCI
                  Communications Corporation (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K
                  dated November 9, 1997 (filed November 12, 1997) (File No. 0-11258))*

  2.2             Agreement  dated as of  November  9, 1997 among  British  Telecommunications  plc,  WorldCom  and MCI
                  Communications  Corporation  (incorporated  by  reference to Exhibit  99.1 to the  Company's  Current
                  Report on Form 8-K dated November 9, 1997 (filed November 12, 1997) (File No. 0-11258))*

  2.3             Agreement and Plan of Merger, dated as of September 7, 1997, by and among H&R Block, Inc., H&R Block Group, Inc.,
                  CompuServe Corporation, WorldCom, and Walnut Acquisition Company, L.L.C. (incorporated herein by reference to
                  Exhibit 2.1 to the Company's Current Report on Form 8-K dated September 7, 1997 (File No. 0-11258))*

  2.4             Purchase  and Sale  Agreement  by and among  America  Online,  Inc.,  ANS  Communications,  Inc.  and
                  WorldCom,  dated as of  September  7, 1997  (incorporated  herein by  reference to Exhibit 2.4 to the
                  Company's Current Report on Form 8-K dated September 7, 1997 (File No. 0-11258))*

  2.5             Amended  and  Restated  Agreement  and  Plan of  Merger  dated as of  October  1,  1997 by and  among
                  WorldCom,  BV  Acquisition,  Inc. and Brooks Fiber  Properties,  Inc.  (incorporated  by reference to
                  Exhibit 2.1 to WorldCom's Registration Statement on Form S-4 (File No. 333-43253))*

  4.1             Second Amended and Restated Articles of Incorporation of MCI WORLDCOM, Inc. (including preferred stock
                  designations), as amended as of September 15, 1998 (incorporated herein by reference to Exhibit 4.1 of MCI
                  WorldCom's Post-Effective Amendment No. 1 on Form S-8 to Registration Statement on Form S-4, No. 333-36901 (filed
                  September 14, 1998))

  4.2             Restated Bylaws of MCI WORLDCOM, Inc. (incorporated by reference to Exhibit 3.2 to the Company's Current Report on
                  Form 8-K dated September 14, 1998 (filed September 29, 1998)) (File No. 0-11258)

  4.3             Form of 6.125% Notes Due 2001 (incorporated herein by reference to Exhibit 4.1 to the Company's Current Report on
                  Form 8-K dated August 6, 1998 (filed August 7, 1998) (File No. 0-11258))
</TABLE>


<PAGE>   38

<TABLE>
<CAPTION>
  Exhibit No.                 Description
  -----------                 -----------

<S>               <C>
  4.4             Form of 6.250% Notes Due 2003 (incorporated herein by reference to Exhibit 4.2 to the Company's Current Report on
                  Form 8-K dated August 6, 1998 (filed August 7, 1998) (File No. 0-11258))

  4.5             Form of 6.400% Notes Due 2005 (incorporated herein by reference to Exhibit 4.3 to the Company's Current Report on
                  Form 8-K dated August 6, 1998 (filed August 7, 1998) (File No. 0-11258))

  4.6             Form of 6.950% Notes Due 2028 (incorporated herein by reference to Exhibit 4.4 to the Company's Current Report on
                  Form 8-K dated August 6, 1998 (filed August 7, 1998) (File No. 0-11258))

  4.7             Senior Indenture dated March 1, 1997 by and between WorldCom and The Chase Manhattan Bank, as successor trustee to
                  Mellon Bank N.A. (incorporated herein by reference to Exhibit 4.6 to WorldCom's Quarterly Report on Form 10-Q for
                  the period ended March 31, 1997 (File No. 0-11258))

  4.8             Supplemental Indenture No. 3 to the Junior Subordinated Indenture dated as of November 12, 1998, among MCI
                  WORDLCOM, Inc., MCI Communications Corporation and Wilmington Trust Company

  4.9             Supplement No. 1 to the Guarantee Agreement dated as of November 12, 1998 among MCI WORLDCOM, Inc., MCI
                  Communications Corporation (as guarantor) and Wilmington Trust Company (as trustee)

  4.10            Trust Agreement Guarantee dated as of November 12, 1998, among Wilmington Trust Company, the administrative
                  trustee thereto, MCI Communications Corporation and MCI WORLDCOM, Inc.

  4.11            Expense Agreement Guarantee dated as of November 12, 1998, between MCI WORLDCOM, Inc. and MCI Capital I, a
                  Delaware business trust

  4.12            Junior Subordinated Indenture between MCI Communications Corporation and Wilmington Trust Company, as Debenture
                  Trustee (incorporated by reference to Exhibit 4.01 of MCI's Registration Statement on Form S-3, Registration No.
                  333-02693)

  4.13            Form of Amended and Restated Trust Agreement among MCI Communications Corporation, as Depositor, Wilmington Trust
                  Company, as Property Trustee and Delaware Trustee, and the Administrative Trustees named therein (incorporated by
                  reference to Exhibit 4.10 of MCI's Registration Statement on Form S-3, Registration No. 333-02593)

  4.14            Form of Guarantee Agreement between MCI Communications Corporation, as Guarantor, and Wilmington Trust Company, as
                  Trustee (incorporated by reference to Exhibit 4.12 of MCI's Registration Statement on Form S-3, Registration No.
                  333-02593)

  4.15            Form of Supplemental Indenture between MCI Communications Corporation and Wilmington Trust Company, as Debenture
                  Trustee (incorporated by reference to Exhibit 4.13 of MCI's Registration Statement on Form S-3, Registration No.
                  333-02593)

   
  10.1**          Amended and Restated Facility A Revolving Credit Agreement among WorldCom (borrower), NationsBank, N.A. (Arranging
                  Agent and Administrative Agent), NationsBanc Montgomery Securities LLC (Lead Arranger), Bank of America NT & SA,
                  Barclays Bank PLC, The Chase Manhattan Bank, Citibank, N.A., Morgan Guaranty Trust Company of New York, and Royal
                  Bank of Canada (Co-Syndication Agents) and the lenders named therein dated as of August 6, 1998 (incorporated
                  herein by reference to Exhibit 10.1 to WorldCom's Current Report on Form 8-K dated August 6, 1998 (filed August 7,
                  1998) (File No. 0-11258))
</TABLE>



<PAGE>   39



<TABLE>
<CAPTION>
  Exhibit No.                 Description
  -----------                 -----------

<S>               <C>
10.2              Amended and Restated Facility B Term Loan Agreement among WorldCom (borrower), NationsBank, N.A. (Arranging Agent
                  and Administrative Agent), NationsBanc Montgomery Securities LLC (Lead Arranger), Bank of America NT & SA,
                  Barclays Bank PLC, The Chase Manhattan Bank, Citibank, N.A., Morgan Guaranty Trust Company of New York, and Royal
                  Bank of Canada (Co-Syndication Agents) and the lenders named therein dated as of August 6, 1998 (incorporated
                  herein by reference to Exhibit 10.2 to WorldCom's Current Report on Form 8-K dated August 6, 1998 (filed August 7,
                  1998) (File No. 0-11258))

10.3              364-Day Revolving Credit and Term Loan Agreement among WorldCom (borrower), NationsBank, N.A. (Arranging Agent and
                  Administrative Agent), NationsBanc Montgomery Securities LLC (Lead Arranger), Bank of America NT & SA, Barclays
                  Bank PLC, The Chase Manhattan Bank, Citibank, N.A., Morgan Guaranty Trust Company of New York, and Royal Bank of
                  Canada (Co-Syndication Agents) and the lenders named therein dated as of August 6, 1998 (incorporated herein by
                  reference to Exhibit 10.3 to WorldCom's Current Report on Form 8-K dated August 6, 1998 (filed August 7, 1998)
                  (File No. 0-11258))

10.4              MCI 1979 Stock Option Plan as amended and restated (incorporated by reference to Exhibit 10(a) to MCI's Annual
                  Report on Form 10-K for the fiscal year ended December 31, 1988 (File No. 0-6457)) (compensatory plan)***

10.5              Supplemental Retirement Plan for Employees of MCI Communications Corporation and Subsidiaries, as amended
                  (incorporated by reference to Exhibit 10(b) to MCI's Annual Report on Form 10-K for the fiscal year ended December
                  31, 1993 (File No. 0-6457)) (compensatory plan)***

10.6              Description of Executive Life Insurance Plan for MCI Communications Corporation and Subsidiaries (incorporated by
                  reference to "Remuneration of Officers" in MCI's Proxy Statement for its 1992 Annual Meeting of Stockholders (File
                  No. 0-6457)) (compensatory plan)***

10.7              MCI Communications Corporation Executive Incentive Compensation Plan (incorporated by reference to Exhibit 10(e)
                  to MCI's Annual Report on Form 10-K for the fiscal year ended December 31, 1995 (File No. 0-6457)) (compensatory
                  plan)***

10.8              Amendment No. 1 to MCI Communications Corporation Executive Incentive Compensation Plan (incorporated by reference
                  to Exhibit 10(e) to MCI's Annual Report on Form 10-K for the fiscal year ended December 31, 1996 (File No.
                  0-6457)) (compensatory plan)***

10.9              1988 Directors' Stock Option Plan of MCI (incorporated by reference to Exhibit D to MCI's Proxy Statement for its
                  1989 Annual Meeting of Stockholders (File No. 0-6457)) (compensatory plan)***

10.10             Amendment No. 1 to the 1988 Directors' Stock Option Plan of MCI (incorporated by reference to Appendix D to MCI's
                  Proxy Statement for its 1996 Annual Meeting of Stockholders (File No. 0-6457)) (compensatory plan)***

10.11             Amendment No. 2 to 1988 Directors' Stock Option Plan of MCI (incorporated by reference to Exhibit 10(i) to MCI's
                  Annual Report on Form 10-K for the fiscal year ended December 31, 1996) (File No.
                  0-6457)) (compensatory plan)***

10.12             Amendment No. 3 to 1988 Directors' Stock Option Plan of MCI (incorporated by reference to Exhibit 10(j) to MCI's
                  Annual Report on Form 10-K for the fiscal year ended December 31, 1996 (File No.
                  0-6457)) (compensatory plan)***
</TABLE>


<PAGE>   40

<TABLE>
<CAPTION>
  Exhibit No.                 Description
  -----------                 -----------

<S>               <C>
10.13             Stock Option Plan of MCI (incorporated by reference to Exhibit C to MCI's Proxy Statement for its 1989 Annual
                  Meeting of Stockholders (File No. 0-6457)) (compensatory plan)***

10.14             Amendment No. 1 to the Stock Option Plan of MCI (incorporated by reference to Exhibit 10(1) to MCI's Annual Report
                  on Form 10-K for the fiscal year ended December 31, 1996 (File No. 0-6457)) (compensatory plan)***

10.15             Amendment No. 2 to the Stock Option Plan of MCI (incorporated by reference to Appendix B to MCI's Proxy Statement
                  for its 1996 Annual Meeting of Stockholders (File No. 0-6457)) (compensatory plan)***

10.16             Amendment No. 3 to the Stock Option Plan of MCI (incorporated by reference to Exhibit 10(n) to MCI's Annual Report
                  on Form 10-K for the fiscal year ended December 31, 1996 (File No. 0-6457)) (compensatory plan)***

10.17             Amendment No. 4 to the Stock Option Plan of MCI (incorporated by reference to Exhibit 10(o) to MCI's Annual Report
                  on Form 10-K for the fiscal year ended December 31, 1996 (File No. 0-6457)) (compensatory plan)***

10.18             Amendment No. 5 to the Stock Option Plan of MCI (incorporated by reference to Exhibit 10(p) to MCI's Annual Report
                  on Form 10-K for the fiscal year ended December 31, 1996 (File No. 0-6457)) (compensatory plan)***

10.19             Board of Directors Deferred Compensation Plan of MCI (incorporated by reference to Exhibit 10(i) to MCI's Annual
                  Report on Form 10-K for the fiscal year ended December 31, 1994 (File No. 0-6457)) (compensatory plan)

10.20             The Senior Executive Incentive Compensation Plan of MCI (incorporated by reference to Appendix A to MCI's Proxy
                  Statement for its 1996 Annual Meeting of Stockholders (File No. 0-6457)) (compensatory plan)

10.21             Amendment No. 1 to the Senior Executive Incentive Compensation Plan of MCI (incorporated by reference to Exhibit
                  10(s) to MCI's Annual Report on Form 10-K for the fiscal year ended December 31, 1996 (File No. 0-6457))
                  (compensatory plan)

10.22             Executive Severance Policy (incorporated by reference to Exhibit 10(a) to MCI's Quarterly Report on Form 10-Q for
                  the quarter ended September 30, 1996 (File No. 0-6457)) (compensatory plan)

10.23             Form of employment agreement, effective as of November 2, 1996, between MCI and certain executive officers of MCI
                  (incorporated by reference to Exhibit 10(u) to MCI's Annual Report on Form 10-K for the fiscal year ended December
                  31, 1996 (File No. 0-6457)) (compensatory plan)

27.1              Financial Data Schedule
</TABLE>

*The registrant hereby agrees to furnish supplementally a copy of any omitted
schedules to this Agreement to the Securities and Exchange Commission.

**No other long-term debt instruments are filed since the total amount of
securities authorized under any such instrument does not exceed ten percent of
the total assets of the Company and its subsidiaries on a consolidated basis.
The Company agrees to furnish a copy of such instruments to the Securities and
Exchange Commission upon request.

***Pursuant to this plan, the common stock of the Company was substituted for
common stock of MCI.


<PAGE>   1
                                                                     EXHIBIT 4.8


                          SUPPLEMENTAL INDENTURE NO. 3

                                     TO THE

                          JUNIOR SUBORDINATED INDENTURE

                            DATED AS OF MAY 29, 1996,

                                     BETWEEN

                         MCI COMMUNICATIONS CORPORATION

                                       AND

                        WILMINGTON TRUST COMPANY, TRUSTEE

                                       FOR

                       JUNIOR SUBORDINATED DEBT SECURITIES


         THIS SUPPLEMENTAL INDENTURE NO. 3 ("Supplemental Indenture No. 3") to
the Junior Subordinated Indenture, dated as of May 29, 1996 (including this
Supplemental Indenture No. 3 and all other indentures supplemental thereto, the
"Indenture"), between MCI Communications Corporation, a Delaware corporation and
wholly-owned subsidiary of the Guarantor (as hereinafter defined) ("MCI" or the
"Company") (formerly known as TC Investments Corp.), with an office at 1801
Pennsylvania Avenue, N.W., Washington, D.C. 20006, and Wilmington Trust Company,
a Delaware banking corporation duly organized and existing under the laws of the
State of Delaware, as trustee under the Indenture (the "Trustee"), is entered
into as of November 12, 1998, by and among the Trustee, MCI and MCI WORLDCOM,
Inc., a Georgia corporation ("MCI WorldCom" or the "Guarantor").

         WHEREAS, the Indenture provides for the issuance of unsecured
subordinated debt securities (the "Securities") of MCI from time to time in one
or more series; and

         WHEREAS, the First Supplemental Indenture, dated as of May 29, 1996,
provides for the establishment of a series of Securities known as the 8.00%
Junior Subordinated Deferrable Interest Debentures, Series A (the "Debentures");
and

         WHEREAS, MCI Capital I, a Delaware statutory business trust (the
"Trust"), has issued $750,000,000 aggregate liquidation amount of its 8.00%
Cumulative Quarterly Income Preferred Securities, Series A (the "Preferred
Securities"), representing undivided beneficial interests in the assets of the
Trust, to the public, and $23,195,000 aggregate liquidation amount of its Common
Securities to MCI, and has invested the proceeds of such


<PAGE>   2

issuance in $773,195,000 aggregate principal amount of the Debentures; and

         WHEREAS, pursuant to Supplemental Indenture No. 2 to the Indenture, the
Company assumed the due and punctual payment of the principal of (and premium,
if any) and interest (including any Additional Interest) on all the Securities
and the performance of certain covenants more specifically described therein;
and

         WHEREAS, the Guarantor desires, as of the date hereof, to
unconditionally and irrevocably guarantee, on a subordinated basis, the full and
punctual payment of principal of (and premium, if any), and interest (including
any Additional Interest) on the Securities when due (after the passing of any
applicable cure periods available to the Company), whether at maturity, by
acceleration, by redemption or otherwise, and all other monetary obligations of
the Company under the Indenture (including obligations to the Trustee) and the
Securities, and the full and punctual performance within applicable grace
periods of all other obligations of the Company under the Indenture and the
Securities; and

         WHEREAS, Section 901(7) of the Indenture allows the Company and the
Trustee to enter into one or more indentures supplemental thereto, without the
consent of any Holders, provided that such action shall not materially adversely
affect the interest of the Holders of the Debentures or the holders of the
Preferred Securities;

         NOW, THEREFORE, in consideration of the mutual covenants and promises
set forth herein and other good and valuable consideration, the adequacy and
receipt of which are hereby acknowledged, the parties agree to amend the
Indenture as follows:

ARTICLE I.  The following sections of this Supplemental Indenture
No. 3 supplement the Indenture with respect to the Securities
issued thereunder:

         Section 1.  Definitions.  (a) Article I, Section 101 of
the Indenture is hereby supplemented, to add the following
definitions:

         "Guarantee" shall have the meaning ascribed thereto in
Section 2 hereof.

         "Guarantee Payment" shall have the meaning ascribed thereto in Section
2 hereof.

         "Guarantor" means MCI WORLDCOM, Inc., a Georgia corporation, formerly
known as WorldCom, Inc.




                                      - 2 -
<PAGE>   3



         "Guarantor Senior Debt" means the principal of (and premium, if any)
and interest, if any (including, without limitation, interest accruing on or
after the filing of any petition in bankruptcy or for reorganization relating to
the Guarantor whether or not such claim for post-petition interest is allowed in
such proceeding), on Debt of the Guarantor, whether incurred on or prior to the
date of this Supplemental Indenture No. 3 or thereafter incurred, unless, in the
instrument creating or evidencing the same or pursuant to which the same is
outstanding, it is expressly provided that such obligations are not superior in
right of payment to the Securities or to other Debt of the Guarantor which is
pari passu with, or subordinated to, the Securities, provided, however, that
Guarantor Senior Debt shall not be deemed to include (a) any Debt of the
Guarantor which, when incurred and without respect to any election under Section
1111(b) of the Bankruptcy Reform Act of 1978, was without recourse to the
Guarantor, (b) any Debt of the Guarantor to any of its Subsidiaries, other than
Debt to a Subsidiary the proceeds of which the Guarantor used to pay Guarantor
Senior Debt (c) any Debt to any employee of the Guarantor, (d) any liability for
taxes, or (e) any Debt or other monetary obligations to trade creditors created
or assumed by the Guarantor or any of its Subsidiaries in the ordinary course of
business in connection with the obtaining of goods, materials or services.

         Section 2. The Guarantee. (a) The Guarantor irrevocably and
unconditionally guarantees, on a subordinated basis as set forth herein (the
"Guarantee") to each Holder of Securities and to the Trustee and its successors
and assigns, (i) the full and punctual payment of principal of (and premium, if
any) and interest (including any Additional Interest), on the Securities when
due (after the passing of any applicable cure periods available to the Company),
whether at maturity, by acceleration, by redemption or otherwise, and all other
monetary obligations of the Company under the Indenture (including obligations
to the Trustee) and the Securities (any such payment, a "Guarantee Payment") and
(ii) the full and punctual performance within applicable grace periods of all
other obligations of the Company under the Indenture and the Securities.

         (b) The Guarantor further agrees that the Guarantee constitutes a
guarantee of payment, performance and compliance and not merely of collection.

         (c) The obligations of the Guarantor to make any payment hereunder may
be satisfied by causing the Company to make such payment.

         (d) The Guarantor also agrees to pay any and all costs and expenses
(including reasonable attorneys' fees) incurred by the Trustee or any Holder of
Securities in enforcing any of their respective rights under the Guarantee.




                                      - 3 -
<PAGE>   4



         Section 3. Waiver of Notice and Demand. The Guarantor hereby waives
notice of acceptance of the Guarantee and of any liability to which it applies
or may apply, presentment, demand for payment, any right to require a proceeding
first against the Trustee, the Company or any other Person before proceeding
against the Guarantor, protest, notice of nonpayment, notice of dishonor, notice
of redemption and all other notices and demands.

         Section 4. Obligations Not Affected. The obligations, covenants,
agreements and duties of the Guarantor under the Guarantee shall in no way be
affected or impaired by reason of the happening from time to time of any of the
following:

                  (a) the release or waiver, by operation of law or otherwise,
of the performance or observance by the Company of any express or implied
agreement, covenant, term or condition under the Indenture relating to the
Securities to be performed or observed by the Company;

                  (b) the extension of time for the payment by the Company of
all or any portion of (i) any payment of principal of (and premium, if any) or
interest (including any Additional Interest) on the Securities when due, whether
at maturity, by acceleration, by redemption or otherwise, or any other monetary
obligation of the Company under the Indenture (including obligations to the
Trustee) and the Securities, or (ii) the extension of time for the full and
punctual performance within applicable grace periods of all other obligations of
the Company under the Indenture and the Securities;

                  (c) any failure, omission, delay or lack of diligence on the
part of the Holders of the Securities or the Trustee to enforce, assert or
exercise any right, privilege, power or remedy conferred on the Holders of the
Securities or the Trustee pursuant to the terms of the Indenture or the
Securities, or any action on the part of the Company granting indulgence or
extension of any kind;

                  (d) voluntary or involuntary liquidation, dissolution, sale of
any collateral, receivership, insolvency, bankruptcy, assignment for the benefit
of creditors, reorganization, arrangement, composition or readjustment of debt
of, or other similar proceedings affecting, the Company or any of the assets of
the Company;

                  (e)  any invalidity of, or defect or deficiency in, the
Securities or the Indenture,

                  (f) the settlement or compromise of any obligation guaranteed
hereby or hereby incurred; or

                  (g) any other circumstance whatsoever that might otherwise
constitute a legal or equitable discharge or defense of a guarantor, it being
the intent of this Section 4 that the



                                      - 4 -

<PAGE>   5



obligations of the Guarantor hereunder shall be absolute and
unconditional under any and all circumstances.

         There shall be no obligation of the Holders of the Securities or the
Trustee to give notice to, or obtain the consent of, the Guarantor with respect
to the happening of any of the foregoing.

         Section 5. (a) Collection of Guarantee and Suits for Enforcement by
Trustee. The Guarantor covenants that if any Guarantee Payment is due and
payable, the Guarantor will, upon demand of the Trustee, pay to the Trustee (or
cause the Company to pay to the Trustee), for the benefit of the Holders and the
Trustee the whole amount of such Guarantee Payment then due and payable.

                  If the Guarantor fails to pay (or cause the Company to pay)
such amounts forthwith upon such demand, the Trustee, in its own name and as
trustee of an express trust, may institute a judicial proceeding for the
collection of the sums so due and unpaid, and may prosecute such proceeding to
judgment or final decree, and may enforce the same against the Guarantor and
collect the moneys adjudged or decreed to be payable in the manner provided by
law out of the property of the Guarantor, whenever situated.

                  If any Guarantee Payment is due and payable, the Trustee may
in its discretion proceed to protect and enforce its rights and the rights of
the Holders of Securities by such appropriate judicial proceedings as the
Trustee shall deem most effectual to protect and enforce any such rights,
whether for the specific enforcement of any covenant or agreement in this
Indenture or in aid of the exercise of any power granted herein, or to enforce
any other proper remedy.

                           (b)  Trustee May File Proofs of Claim.  In case
of the pendency of any receivership, insolvency, liquidation, bankruptcy,
reorganization, arrangement, adjustment, composition or other similar judicial
proceeding relative to the Guarantor (any such event being hereinafter referred
to as a "Guarantor Proceeding"), unless, in the event such proceeding is
involuntary, the petition instituting the same is dismissed within 60 days after
its filing,

                           (i) the Trustee (irrespective of whether any
                  Guarantee Payment shall then be due and payable and
                  irrespective of whether the Trustee shall have made any demand
                  on the Guarantor for the payment of any overdue Guarantee
                  Payment) shall be entitled and empowered, by intervention in
                  any such Guarantor Proceeding or otherwise,

                                    (A) to file and prove a claim for the whole
                           amount of principal (and premium, if any) and



                                      - 5 -
<PAGE>   6



                           interest (including any Additional Interest) owing
                           and unpaid in respect to the Securities and to file
                           such other papers or documents as may be necessary or
                           advisable and to take any and all actions as are
                           authorized under the Trust Indenture Act in order to
                           have the claims of the Holders and any predecessor to
                           the Trustee under Section 607 of the Indenture and of
                           the Holders allowed in any such judicial proceedings;
                           and

                                    (B) in particular, the Trustee shall be
                           authorized to collect and receive any moneys or other
                           property payable or deliverable on any such claims
                           and to distribute the same in accordance with Section
                           506 of the Indenture; and

                           (ii) any custodian, receiver, assignee, trustee,
                  liquidator, sequestrator (or other similar official) in any
                  such Guarantor Proceeding is hereby authorized by each Holder
                  to make such payments to the Trustee for distribution in
                  accordance with Section 506 of the Indenture, and in the event
                  that the Trustee shall consent to the making of such payments
                  directly to the Holders, to pay to the Trustee any amount due
                  to it and any predecessor Trustee under Section 607 of the
                  Indenture.

                  Nothing herein contained shall be deemed to authorize the
Trustee to authorize or consent to or accept or adopt on behalf of any Holder
any plan of reorganization, arrangement, adjustment or composition affecting the
Securities or the rights of any Holder thereof, or to authorize the Trustee to
vote in respect of the claim of any Holder in any Guarantor Proceeding;
provided, however, that the Trustee may, on behalf of the Holders, vote for the
election of a trustee in bankruptcy or similar official and be a member of a
creditors' or other similar committee.

                  (c) Unconditional Right of Holders and Trustee to Receive
Guarantee Payments. Notwithstanding any other provision in the Indenture, the
Holder of any Security and the Trustee shall have the right, which is absolute
and unconditional, to receive any Guarantee Payments due to them pursuant to
Article I, Section 2 of this Supplemental Indenture No. 3, and to institute suit
for the enforcement of any such Guarantee Payment, and such right shall not be
impaired without the consent of the Trustee or such Holder. In the case of
Securities of a series issued to an MCI Trust, any holder of the corresponding
series of Preferred Securities shall have the right to institute a proceeding
directly against the Guarantor for enforcement of payment to such Holder of any
such Guarantee Payments due on Securities having a principal amount equal to the
aggregate liquidation preference of the Preferred Securities of the
corresponding series held by such Holder.



                                      - 6 -

<PAGE>   7
                  (d) Restoration of Rights and Remedies. If the Trustee or any
Holder has instituted any proceeding to enforce any right or remedy under the
Indenture and such proceeding has been discontinued or abandoned for any reason,
or has been determined adversely to the Trustee or to such Holder, then and in
every such case the Company, the Guarantor, the Trustee and the Holders shall,
subject to any determination in such proceeding, be restored severally and
respectively to their former positions hereunder, and thereafter all rights and
remedies of the Company, the Guarantor, the Trustee and the Holders shall
continue as though no such proceeding had been instituted.

                  (e) Delay or Omission Not Waiver. Except as otherwise provided
in the last paragraph of Section 306 of the Indenture, no delay or omission of
the Trustee or of any Holder of any Security to exercise any right or remedy
with respect to any Guarantee Payments due them hereunder shall impair any such
right or remedy or constitute a waiver of their right to receive such Guarantee
Payment or an acquiescence therein.

                  Every right and remedy given by Article Five of the Indenture,
by this Supplemental Indenture No. 3 or by law to the Trustee or to the Holders
may be exercised from time to time, and as often as may be deemed expedient, by
the Trustee or by the Holders, as the case may be.

                  (f)      Waiver of Usury, Stay or Extension Laws.  The
Guarantor covenants (to the extent that it may lawfully do so) that it will not
at any time insist upon, or plead, or in any manner whatsoever claim or take the
benefit or advantage of, any usury, stay or extension law wherever enacted, now
or at the time hereafter in force, which may affect the covenants or the
performance of the Indenture; and the Guarantor (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such
law, and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

         Section 6.  Subordination.  (a)  Guarantee Subordinate to
Guarantor Senior Debt.  The Guarantee is hereby expressly
subordinated in right of payment to the prior payment in full of
all Guarantor Senior Debt, and such subordination is for the
benefit of the holders of such Guarantor Senior Debt.

         (b)      Payment Over of Proceeds Upon Dissolution, Etc.  In
case of the pendency of any Guarantor Proceeding, the holders of Guarantor
Senior Debt shall be entitled to receive payment in full of principal of (and
premium, if any) and interest, if any, on such Guarantor Senior Debt, or
provision shall be made for such payment in cash or cash equivalents or
otherwise in a manner satisfactory to the holders of Guarantor Senior Debt,
before any payment is made in respect of the Guarantee.



                                      - 7 -
<PAGE>   8



         In the event that, notwithstanding the foregoing provisions of this
Section, the Trustee or the Holder of any Security shall have received any
payment of the Guarantor in respect of the Guarantee, before all Guarantor
Senior Debt is paid in full or payment thereof is provided for in cash or cash
equivalents or otherwise in a manner satisfactory to the holders of Guarantor
Senior Debt, and if such fact shall, at or prior to the time of such payment or
distribution, have been made known to the Trustee or, as the case may be, such
Holder, then and in such event such payment or distribution shall be paid over
or delivered forthwith to the trustee in bankruptcy, receiver, liquidating
trustee, custodian, assignee, agent or other Person making payment or
distribution of assets of the Guarantor for application to the payment of all
Guarantor Senior Debt remaining unpaid, to the extent necessary to pay all
Guarantor Senior Debt in full, after giving effect to any concurrent payment or
distribution to or for the holders of Guarantor Senior Debt.

         (c) Prior Payment of Guarantor Senior Debt Upon Acceleration of
Securities. In the event that any payments are due pursuant to the Guarantee,
then and in such event the holders of the Guarantor Senior Debt shall be
entitled to receive payment in full of all amounts due on or in respect of such
Guarantor Senior Debt (including any amounts due upon acceleration or
otherwise), or provision shall be made for such payment in cash or cash
equivalents or otherwise in a manner satisfactory to the holders of Guarantor
Senior Debt, before any payments are made on account of the Guarantee.

         In the event that, notwithstanding the foregoing, the Guarantor shall
make any payment to the Trustee or the Holder of any Security prohibited by the
foregoing provisions of this Section 6(c), and if such fact shall, at or prior
to the time of such payment, have been made known to the Trustee or, as the case
may be, such Holder, then and in such event such payment shall be paid over and
delivered forthwith to the Guarantor.

         The provisions of this Section 6(c) shall not apply to any payment with
respect to which Section 6(b) of Article I of this Supplemental Indenture No. 3
would be applicable.

         (d) No Payment When Guarantor Senior Debt in Default. (i) In the event
and during the continuation of any default in the payment of principal of (or
premium, if any) or interest on any Guarantor Senior Debt, or in the event that
any event of default with respect to any Guarantor Senior Debt shall have
occurred and be continuing and shall have resulted in such Guarantor Senior Debt
becoming or being declared due and payable prior to the date on which it would
otherwise have become due and payable, unless and until such event of default
shall have been cured or waived or shall have ceased to exist and such
acceleration shall have been rescinded or annulled, or (ii) in the event any
judicial proceeding shall be pending with respect to any default in payment or
such event of default, then no



                                      - 8 -
<PAGE>   9

payment shall be made by the Guarantor on account of the Guarantee.

         In the event that, notwithstanding the foregoing, the Guarantor shall
make any payment to the Trustee or the Holder of any Security prohibited by the
foregoing provisions of this Section 6(d), and if such fact shall, at or prior
to the time of such payment, have been made known to the Trustee or, as the case
may be, such Holder, then and in such event such payment shall be paid over and
delivered forthwith to the Guarantor.

         The provisions of this Section 6(d) shall not apply to any payment with
respect to which Section 6(b) of Article I of this Supplemental Indenture No. 3
would be applicable.

         (e) Payment Permitted If No Default. Nothing contained in this Section
6 or elsewhere in the Indenture or in any of the Securities shall prevent (i)
the Guarantor, at any time except during the pendency of any Guarantor
Proceeding referred to in Section 6(b) of Article I of this Supplemental
Indenture No. 3 or under the conditions described in Sections 6(c) and 6(d) of
Article I of this Supplemental Indenture No. 3, from making payments at any time
in respect of this Guarantee, or (ii) the application by the Trustee of any
money or Government Obligations deposited with it hereunder to the payment of or
on account of the Guarantee or the retention of such payment by the Holders if,
at the time of such application by the Trustee, it did not have knowledge that
such payment would have been prohibited by the provisions of this Section 6.

         (f) Subrogation to Rights of Holders of Guarantor Senior Debt. Subject
to the payment in full of all Guarantor Senior Debt, or the provision for such
payment in cash or cash equivalents or otherwise in a manner satisfactory to the
holders of Guarantor Senior Debt, the Trustee and the Holders of the Securities
shall be subrogated to the extent of the payments or distributions made to the
holders of such Guarantor Senior Debt pursuant to the provisions of this Section
6 (equally and ratably with the holders of all indebtedness of the Guarantor
which by its express terms is subordinated to Guarantor Senior Debt to
substantially the same extent as the Guarantee is subordinated to the Guarantor
Senior Debt and is entitled to like rights of subrogation by reason of any
payments or distributions made to holders of such Guarantor Senior Debt) to the
rights of the holders of such Guarantor Senior Debt to receive payments and
distributions of cash, property and securities applicable to the Guarantor
Senior Debt until the Guarantee payments due hereunder shall be paid in full.
For purposes of such subrogation, no payments or distributions to the holders of
the Guarantor Senior Debt of any cash, property or securities to which the
Holders of the Securities or the Trustee would be entitled except for the
provisions of this Section 6, and no payments over pursuant to the provisions of
this Section 6 to the holders of Guarantor Senior Debt by Holders of the
Securities or the Trustee, shall,



                                      - 9 -
<PAGE>   10

as among the Guarantor, its creditors other than holders of Guarantor Senior
Debt, and the Holders of the Securities and the Trustee, be deemed to be a
payment or distribution by the Guarantor to or on account of the Guarantor
Senior Debt.

         (g) Provisions Solely to Define Relative Rights. The provisions of this
Section 6 are and are intended solely for the purpose of defining the relative
rights of the Holders of the Securities and the Trustee on the one hand and the
holders of Guarantor Senior Debt on the other hand. Nothing contained in this
Section 6 or elsewhere in the Indenture or in the Securities is intended to or
shall (i) impair, as between the Guarantor and the Holders of the Securities and
the Trustee, the obligations of the Guarantor, which are absolute and
unconditional, to pay to the Holders of the Securities and the Trustee, all
Guarantee Payments due pursuant to Section 2 of this Supplemental Indenture No.
3 or (ii) affect the relative rights against the Guarantor of the Holders of the
Securities or the Trustee and creditors of the Guarantor other than their rights
in relation to the holders of Guarantor Senior Debt; or (iii) prevent the
Trustee or the Holder of any Security from exercising all remedies otherwise
permitted by applicable law upon default under this Supplemental Indenture No.
3, including, without limitation, filing and voting claims in any Guarantor
Proceeding, subject to the rights, if any, under this Section 6 of the holders
of Guarantor Senior Debt to receive cash, property and securities otherwise
payable or deliverable to the Trustee or such Holder.

         (h) Trustee to Effectuate Subordination. Each Holder of a Security by
his or her acceptance thereof authorizes and directs the Trustee on his or her
behalf to take such action as may be necessary or appropriate to acknowledge or
effectuate the subordination provided in this Section 6 and appoints the Trustee
his or her attorney-in-fact for any and all such purposes.

         (i) No Waiver of Subordination Provisions. No right of any present or
future holder of any Guarantor Senior Debt to enforce subordination as herein
provided shall at any time in any way be prejudiced or impaired by any act or
failure to act on the part of the Guarantor or by any act or failure to act, in
good faith, by any such holder, or by any noncompliance by the Guarantor with
the terms, provisions and covenants of this Section 6, regardless of any
knowledge thereof that any such holder may have or be otherwise charged with.

         (j) Notice to Trustee. The Guarantor shall give prompt written notice
to the Trustee of any fact known to the Guarantor which would prohibit the
making of any payment to or by the Trustee in respect of the Guarantee.
Notwithstanding the provisions of this Section 6 or any other provision of the
Indenture, the Trustee shall not be charged with knowledge of the existence of
any facts which would prohibit the making of any payment to or by the Trustee in
respect of this Guarantee, unless and until the Trustee shall have received
written notice thereof



                                     - 10 -
<PAGE>   11



from the Guarantor or a holder of Guarantor Senior Debt or from any trustee,
agent or representative therefor (whether or not the facts contained in such
notice are true); provided, however, that if the Trustee shall not have received
the notice provided for in this Section 6(j) at least two Business Days prior to
the date upon which by the terms hereof any monies may become payable under the
Guarantee, then, anything herein contained to the contrary notwithstanding, the
Trustee shall have full power and authority to receive such monies and to apply
the same to the purpose for which they were received and shall not be affected
by any notice to the contrary which may be received by it within two Business
Days prior to such date.

         (k) Reliance on Judicial Order or Certificate of Liquidating Agent.
Upon any payment or distribution of assets of the Guarantor referred to in this
Section 6, the Trustee, subject to the provisions of Article Six of the
Indenture, and the Holders of the Securities shall be entitled to rely upon any
order or decree entered by any court of competent jurisdiction in which such
Proceeding is pending, or a certificate of the trustee in bankruptcy, receiver,
liquidating trustee, custodian, assignee for the benefit of creditors, agent or
other Person making such payment or distribution, delivered to the Trustee or to
the Holders of Securities, for the purpose of ascertaining the Persons entitled
to participate in such payment or distribution, the holders of the Guarantor
Senior Debt and other indebtedness of the Guarantor, the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Section 6.

         (l) Trustee Not Fiduciary for Holders of Guarantor Senior Debt. The
Trustee, in its capacity as trustee under the Indenture, shall not be deemed to
owe any fiduciary duty to the holders of Guarantor Senior Debt and shall not be
liable to any such holders if it shall in good faith mistakenly pay over or
distribute to Holders of Securities or to the Guarantor or to any other Person
cash, property or securities to which any holders of Guarantor Senior Debt shall
be entitled by virtue of this Section 6.

         (m) Rights of Trustee as Holder of Guarantor Senior Debt; Preservation
of Trustee's Rights. The Trustee in its individual capacity shall be entitled to
all the rights set forth in this Section 6 with respect to any Guarantor Senior
Debt which may at any time be held by it, to the same extent as any other holder
of Guarantor Senior Debt, and nothing in the Indenture shall deprive the Trustee
of any of its rights as such holder.

         (n) Section 6 of Supplemental Indenture No. 3 Applicable to Paying
Agent. In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting under the Indenture, the term
"Trustee" as used in this Section 6 shall in such case (unless the context
otherwise requires) be construed as extending to and including such Paying



                                     - 11 -
<PAGE>   12

Agent within its meaning as fully for all intents and purposes as if such Paying
Agent were named in this Section 6 in addition to or in place of the Trustee.

         Section 7.    Successors and Assigns of Guarantor.  All guarantees and
agreements of the Guarantor contained in this Indenture shall bind the
successors, assigns, receivers, trustees and representatives of the Guarantor.
In the event that the Guarantor shall assign its obligations contained in this
Indenture, the Guarantor shall be discharged from all obligations and covenants
under the Indenture and the Securities to the fullest extent permitted by law.

ARTICLE II.  Section 704 of the Indenture is hereby deleted in
its entirety and the following paragraph is hereby substituted in
lieu thereof:

SECTION 704.     Reports by Company or Guarantor.

            The Company or the Guarantor shall file with the Trustee and with 
the Commission, and transmit to Holders, such information, documents and other
reports, and such summaries thereof, as may be required pursuant to the Trust
Indenture Act at the times and in the manner provided in the Trust Indenture
Act; provided, that any such information, documents or reports required to be
filed with the Commission pursuant to Section 13 or Section 15(d) of the
Securities Exchange Act of 1934 shall be filed with the Trustee within 15 days
after the same is required to be filed with the Commission. Notwithstanding that
the Guarantor may not be required to remain subject to the reporting
requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the
Guarantor shall continue to file with the Commission and provide the Trustee
with the annual reports and the information, documents and other reports which
are specified in Sections 13 and 15(d) of the Securities Exchange Act of 1934.
The Guarantor also shall comply with the other provisions of Trust Indenture Act
Section 314(a).

ARTICLE III. Except as is expressly set forth herein, nothing in this
Supplemental Indenture No. 3 is intended to impose any restrictions or
obligations on the Guarantor, or to create any Events of Default, including,
without limitation, (i) any restrictions on the Guarantor's ability to pay
dividends on or repurchase its securities, or (ii) any Event of Default upon a
Guarantor Proceeding.

ARTICLE IV.  Miscellaneous Provisions.

         Section 1.  Capitalized terms used but not otherwise defined
in this Supplemental Indenture No. 3 shall have the meanings ascribed thereto in
the Indenture. The Article and Section headings herein are for convenience only
and shall not affect the construction hereof. This Supplemental Indenture No. 3
may be executed in counterparts.



                                     - 12 -

<PAGE>   13

         Section 2. THIS SUPPLEMENTAL INDENTURE NO. 3 SHALL BE DEEMED TO BE A
CONTRACT MADE UNDER THE LAWS OF THE STATE OF NEW YORK AND SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT
REGARD TO CONFLICT OF LAWS PRINCIPLES THEREOF.




                     [Remainder of Page Intentionally Blank]

                                     - 13 -

<PAGE>   14
         IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture No. 3 to be duly executed, as of the day and year first above written.

                                            WILMINGTON TRUST COMPANY, as
                                            Trustee


                                            By: /s/ JAMES P. LAWLER
                                               ---------------------------------
                                               name:  James P. Lawler
                                               title: Vice President



                                            MCI WORLDCOM, INC.


                                            By: /s/ SCOTT D. SULLIVAN
                                               ---------------------------------
                                               name:  Scott D. Sullivan
                                               title: Chief Financial Officer




                                            MCI COMMUNICATIONS CORPORATION


                                            By: /s/ SCOTT D. SULLIVAN
                                               ---------------------------------
                                               name:  Scott D. Sullivan
                                               title: Chief Financial Officer




                                     - 14 -


<PAGE>   1
                                                                     EXHIBIT 4.9

                                SUPPLEMENT NO. 1

                                     TO THE

                              GUARANTEE AGREEMENT

                            DATED AS OF MAY 29, 1996

                                    Between

                         MCI COMMUNICATIONS CORPORATION
                                 (as Guarantor)

                                      and

                            WILMINGTON TRUST COMPANY
                                  (as Trustee)


          THIS SUPPLEMENT NO. 1 ("Supplement No. 1") to the Guarantee 
Agreement, dated as of May 29, 1996 (including this Supplement No. 1 and all
other Supplements thereto, the "Guarantee Agreement"), between MCI
Communications Corporation, a Delaware corporation and wholly-owned subsidiary
of the Additional Guarantor (as hereinafter defined) ("MCI" or the "Guarantor")
(formerly known as TC Investments Corp.), and Wilmington Trust Company, a
Delaware banking corporation organized under the laws of Delaware, as trustee
(the "Guarantee Trustee"), is entered into as of November 12, 1998 by and
among MCI, the Guarantee Trustee, and MCI WORLDCOM, Inc., a Georgia corporation
("MCI WorldCom" or the "Additional Guarantor").

          WHEREAS, in connection with the issuance by MCI Capital I, a Delaware
statutory business trust (the "Issuer"), of $750,000,000 aggregate liquidation
amount of its 8.00% Cumulative Quarterly Income Preferred Securities, Series A
(the "Preferred Securities") representing undivided beneficial interests in the
assets of the Issuer, and pursuant to the Guarantee Agreement, the Guarantor
irrevocably and unconditionally agreed, to the extent set forth therein, to pay
to the Holders of the Preferred Securities the Guarantee Payments (as defined
therein) and to make certain other payments on the terms and conditions set
forth therein (collectively, the "Guarantee"); and

          WHEREAS, the Additional Guarantor desires to unconditionally and
irrevocably guarantee, on a subordinated basis, the Guarantor's obligations to
pay in full to the Holders the Guarantee Payments; and
<PAGE>   2
          WHEREAS, Section 802 of the Guarantee Agreement allows for the 
amendment of the Guarantee Agreement, without the consent of the Holders of the
Preferred Securities, provided that such action shall not adversely affect the
rights of the Holders in any material respect;

          NOW THEREFORE, in consideration of the mutual covenants and promises 
set forth herein and other good and valuable consideration, the adequacy and
receipt of which are hereby acknowledged, the parties agree to amend the
Guarantee Agreement as follows:

ARTICLE I.   The following sections of this Supplement No. 1 supplement the
Guarantee Agreement:

          SECTION 1. Definitions.

     "Additional Guarantee" shall have the meaning ascribed thereto in Section 2
of this Article I.

     "Additional Guarantee Payments" means the Guarantee Payments, to the extent
not paid or made by or on behalf of the Issuer or the Guarantor.

     "Additional Guarantor" means MCI WORLDCOM, Inc., a Georgia corporation,
(formerly known as WorldCom, Inc.).

     "Additional Guarantor Event of Default" means a default by the Additional
Guarantor on any of its payment or other obligations under this Guarantee
Agreement; provided, however, that, except with respect to a default in payment
of any Additional Guarantee Payments, the Additional Guarantor shall have
received notice of default and shall not have cured such default within 60 days
after receipt of such notice.

     "Additional Guarantor Senior Debt" means the principal of (and premium, if
any) and interest, if any (including, without limitation, interest accruing on
or after the filing of any petition in bankruptcy or for reorganization relating
to the Additional Guarantor whether or not such claim for post-petition interest
is allowed in such proceeding), on Debt of the Additional Guarantor, whether
incurred on or prior to the date of this Agreement or thereafter incurred,
unless, in the instrument creating or evidencing the same or pursuant to which
the same is outstanding, it is expressly provided that such obligations are not
superior in right of payment to the Additional Guarantee or to other Debt of the
Additional Guarantor which is pari passu with, or subordinated to, the
Additional Guarantee, provided, however, that Additional Guarantor Senior Debt
shall not be deemed to include (a) any Debt of the Additional Guarantor which,
when incurred and without respect to any election under Section 1111(b) of the
Bankruptcy Reform Act of 1978, was without recourse to the Additional Guarantor,
(b) any Debt of the Additional Guarantor to any of its Subsidiaries, other than
Debt to a Subsidiary the proceeds of which the Additional Guarantor used to pay
Additional Guarantor Senior Debt (c) any Debt to any employee of the Additional
Guarantor, (d) any liability for taxes, or (e) any Debt or other monetary
obligations to trade creditors created or assumed by the Additional Guarantor or
any of its Subsidiaries in the ordinary course of business in connection with
the obtaining of goods, materials or services.

                                     - 2 -

<PAGE>   3
     "Issuer" means MCI Capital I, a Delaware statutory business trust.

     "Subsidiary" of any Person means a corporation more than 50% of the
outstanding voting stock of which is owned, directly or indirectly, by such
Person or one or more other Subsidiaries of such Person, or by such Person and
one or more other Subsidiaries of such Person. For purposes of this definition,
"voting stock" means stock which ordinarily has voting power for the election of
directors, whether at all times or only so long as no senior class of stock has
such voting power by reason of any contingency.

          SECTION 2. Additional Guarantee. (a) The Additional Guarantor 
irrevocably and unconditionally agrees, on a subordinated basis as provided
herein (the "Additional Guarantee"), to pay in full to the Holders the
Additional Guarantee Payments (without duplication of amounts theretofore paid
by or on behalf of the Issuer or Guarantor), as and when due, regardless of any
defense, right of set-off or counter claim which the Issuer or the Guarantor may
have or assert. The Additional Guarantor's obligation to make an Additional
Guarantee Payment may be satisfied by direct payment of the required amounts by
the Additional Guarantor to the Holders or by causing the Guarantor or the
Issuer to pay such amounts to the Holders.

          SECTION 3. Waiver of Notice and Demand. The Additional Guarantor 
hereby waives notice of acceptance of the Guarantee Agreement, including the
Additional Guarantee, and of any liability to which it applies or may apply,
presentment, demand for payment, any right to require a proceeding first against
the Guarantee Trustee, Guarantor or the Issuer or any other Person before
proceeding against the Additional Guarantor, protest, notice of nonpayment,
notice of dishonor, notice of redemption and all other notices and demands.

          SECTION 4. Obligations Not Affected. The obligations, covenants, 
agreements and duties of the Additional Guarantor under this Guarantee
Agreement, including the Additional Guarantee, subject to Section 9 of this
Article I of this Supplement No. 1, shall in no way be affected or impaired by
reason of the happening from time to time of any of the following:

               (a) the release or waiver, by operation of law or otherwise, of 
the performance or observance by the Issuer or the Guarantor of any express or
implied agreement, covenant, term or condition relating to the Preferred
Securities or the Guarantee to be performed or observed by the Issuer or the
Guarantor;

               (b) (i) the extension of time for the payment (A) by the Issuer 
of all or any portion of the Distributions (other than an extension of time for
payment of Distributions that results from the extension of any interest payment
period on the Debentures as so provided in the Indenture), Redemption Price,
Liquidation Distribution or any other





                                     - 3 -
<PAGE>   4
sums payable under the terms of the Preferred Securities, or (B) by the
Guarantor of all or any portion of the Guarantee Payments or any other sums
payable under the Guarantee Agreement, or (ii) the extension of time for the
performance of any other obligation under, arising out of, or in connection
with, the Preferred Securities or the Guarantee Agreement;

               (c) any failure, omission, delay or lack of diligence on the 
part of the Holders or the Guarantee Trustee to enforce, assert or exercise any
right, privilege, power or remedy conferred on the Holders or the Guarantee
Trustee pursuant to the terms of the Preferred Securities or the Guarantee
Agreement, or any action on the part of the Issuer granting indulgence or
extension of any kind;

               (d) the voluntary or involuntary liquidation, dissolution, sale 
of any collateral, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition or readjustment
of debt of, or other similar proceedings affecting, the Issuer or the Guarantor
or any of the assets of the Issuer or the Guarantor;

               (e) any invalidity of, or defect or deficiency in, the Preferred
Securities or the Guarantee Agreement;

               (f) the settlement or compromise of any obligation guaranteed 
hereby or hereby incurred; or

               (g) any other circumstance whatsoever that might otherwise 
constitute a legal or equitable discharge or defense of a guarantor, it being
the intent of this Section 4 that the obligations of the Additional Guarantor
hereunder shall be absolute and unconditional under any and all circumstances.

          There shall be no obligation of the Holders, the Guarantor or the 
Guarantee Trustee to give notice to, or obtain consent of, the Additional
Guarantor with respect to the happening of any of the foregoing.

          SECTION 5. Rights of Holders. The Additional Guarantor expressly
acknowledges that: (i) this Guarantee Agreement, including the Additional
Guarantee, will be deposited with the Guarantee Trustee to be held for the
benefit of the Holders; (ii) the Guarantee Trustee has the right to enforce this
Guarantee Agreement, including the Additional Guarantee, on behalf of the
Holders; (iii) the Holders of a majority in liquidation preference of the
Preferred Securities have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the Guarantee Trustee in
respect of this Guarantee Agreement, including the Additional Guarantee, or
exercising any trust or power conferred upon the Guarantee Trustee under this
Guarantee Agreement, including the Additional Guarantee; and (iv) any Holder may
institute a legal proceeding directly against the Additional Guarantor to
enforce its rights under this Guarantee Agreement, including the Additional
Guarantee, without first instituting a legal proceeding against the Issuer, the
Guarantor, the Guarantee Trustee or any other Person.





                                     - 4 -
<PAGE>   5
          SECTION 6. Guarantee of Payment. The Additional Guarantee is a 
guarantee of payment and not merely of collection. The Additional Guarantee will
not be discharged except by payment of the Additional Guarantee Payments in full
(without duplication of amounts theretofore paid by the Issuer or the Guarantor)
or upon distribution of the Debentures to the Holders as provided in the Trust
Agreement.

          SECTION 7. Subrogation. The Additional Guarantor shall be subrogated 
to all (if any) rights of the Holders and the Guarantee Trustee against the
Issuer and the Guarantor in respect of any amounts paid to the Holders or the
Guarantee Trustee by the Additional Guarantor under this Guarantee Agreement;
provided, however, that the Additional Guarantor shall not (except to the extent
required by mandatory provisions of law) be entitled to enforce or exercise any
rights that it may acquire by way of subrogation or any indemnity, reimbursement
or other agreement, in all cases as a result of payment under this Guarantee
Agreement, if, at the time of any such payment, any amounts are due and unpaid
under this Guarantee Agreement. If any amount shall be paid to the Additional
Guarantor in violation of the preceding sentence, the Additional Guarantor
agrees to hold such amount in trust for, and to pay over such amount to, the
Holders or the Guarantee Trustee as the case may be.

          SECTION 8. Independent Obligations. The Additional Guarantor 
acknowledges that its obligations hereunder are independent of the obligations
of the Issuer with respect to the Preferred Securities and the Guarantor with
respect to the Guarantee, and that the Additional Guarantor shall be liable as
principal and as debtor hereunder to make any payments required pursuant to the
terms of this Guarantee Agreement, including the Additional Guarantee,
notwithstanding the occurrence of any event referred to in paragraphs (a)
through (g) inclusive, of Section 4 of this Supplement No. 1.

          SECTION 9. Subordination. The Additional Guarantee will constitute an
unsecured obligation of the Additional Guarantor and will rank subordinate and
junior in right of payment to all Additional Guarantor Senior Debt.

ARTICLE II.    Sections 204, 205, 206 and 207 of the Guarantee Agreement are
hereby amended to read in their entirety as follows:

SECTION 204.    Periodic Reports to Guarantee Trustee.

          The Guarantor or the Additional Guarantor shall provide to the 
Guarantee Trustee, the Securities and Exchange Commission and the Holders such
documents, reports and information, if any, as may be required by Section 314 of
the Trust Indenture Act, and the compliance certificate required by Section 314
of the Trust Indenture Act in the form, in the manner and at the times required
by Section 314 of the Trust Indenture Act.

SECTION 205.   Evidence of Compliance with Conditions Precedent.

          The Guarantor or the Additional Guarantor shall provide to the 
Guarantee Trustee such evidence of compliance with such conditions precedent, if
any, provided for in





                                     - 5 -
<PAGE>   6
this Guarantee Agreement that relate to any of the matters set forth in Section
314(c) of the Trust Indenture Act.  Any certificate or opinion required to be
given by an officer pursuant to Section 314(c)(1) may be given in the form of
an Officers' Certificate.

SECTION 206.  Events of Default; Waiver.

          The Holders of a Majority in liquidation preference of the Preferred
Securities may, on behalf of the Holders, waive any past Event of Default or
Additional Guarantor Event of Default and its consequences. Upon such waiver,
any such Event of Default or Additional Guarantor Event of Default shall cease
to exist, and any Event of Default or Additional Guarantor Event of Default
arising therefrom shall be deemed to have been cured, for every purpose of this
Guarantee Agreement, but no such waiver shall extend to any subsequent or other
default, Event of Default or Additional Guarantor Event of Default or impair any
right consequent therefrom.

SECTION 207.  Event of Default; Notice.

     (a) The Guarantee Trustee shall, within 90 days after the occurrence of an
Event of Default or Additional Guarantor Event of Default, transmit by mail,
first class postage prepaid, to the Holders, notices of all Events of Default
and Additional Guarantor Events of Default known to the Guarantee Trustee,
unless such defaults have been cured before the giving of such notice, provided,
that, except in the case of a default in the payment of a Guarantee Payment or
Additional Guarantee Payment, the Guarantee Trustee shall be protected in
withholding such notice if and so long as the Board of Directors, the executive
committee or a trust committee of directors and/or Responsible Officers of the
Guarantee Trustee in good faith determines that the withholding of such notice
is in the interests of the Holders.

     (b) The Guarantee Trustee shall not be deemed to have knowledge of any
Event of Default or Additional Guarantor Event of Default unless the Guarantee
Trustee shall have received written notice, or a Responsible Officer charged
with the administration of the Trust Agreement shall have obtained written
notice, of such Event of Default or Additional Guarantor Event of Default.

ARTICLE III.     Paragraphs (b) and (c), and subparagraph (d)(i) of Section 301
of the Guarantee Agreement are hereby amended to read in their entirety as
follows:

SECTION 301.    Powers and Duties of the Guarantee Trustee.

     (b) If an Event of Default or an Additional Guarantor Event of Default has
occurred and is continuing, the Guarantee Trustee shall enforce this Guarantee
Agreement, including the Additional Guarantee, for the benefit of the Holders.

     (c) The Guarantee Trustee, before the occurrence of any Event of Default or
Additional Guarantor Event of Default, and after the curing or waiver of all
such Events of Default and Additional Guarantor Events of Default that may have
occurred, shall undertake to perform





                                     - 6 -
<PAGE>   7
only such duties as are specifically set forth in this Guarantee Agreement, and
no implied covenants shall be read into this Guarantee Agreement against the
Guarantee Trustee.  In case an Event of Default or Additional Guarantor Event
of Default has occurred (that has not been waived pursuant to Section 206), the
Guarantee Trustee shall exercise such of the rights and powers vested in it by
this Guarantee Agreement, and use the same degree of care and skill in its
exercise thereof, as a prudent person would exercise or use under the
circumstances in the conduct of his or her own affairs.

     (d) No provision of this Guarantee Agreement shall be construed to relieve
the Guarantee Trustee from liability for its own negligent action, its own
negligent failure to act or its own willful misconduct, except that:

          (i) prior to the occurrence of any Event of Default or Additional
     Guarantor Event of Default and after the curing or waiving of all such
     Events of Default and Additional Guarantor Events of Default that may have
     occurred:

ARTICLE IV.     Subparagraphs (a) (ii), (iii), (iv) and (v) of Section 302 of
the Guarantee Agreement are hereby amended to read in their entirety as
follows:

SECTION 302.     Certain Rights of Guarantee Trustee.

     (a) Subject to the provisions of Section 301:

          (ii) Any direction or act of the Guarantor or Additional Guarantor
     contemplated by this Guarantee Agreement shall be sufficiently evidenced by
     an Officers' Certificate unless otherwise prescribed herein.

          (iii) Whenever, in the administration of this Guarantee Agreement, the
     Guarantee Trustee shall deem it desirable that a matter be proved or
     established before taking, suffering or omitting to take any action
     hereunder, the Guarantee Trustee (unless other evidence is herein
     specifically prescribed) may, in the absence of bad faith on its part,
     request and rely upon an Officers' Certificate which, upon receipt of such
     request from the Guarantee Trustee, shall be promptly delivered by the
     Guarantor or Additional Guarantor, as the case may be.

          (iv) The Guarantee Trustee may consult with legal counsel, and the
     written advice or opinion of such legal counsel with respect to legal
     matters shall be full and complete authorization and protection in respect
     of any action taken, suffered or omitted to be taken by it hereunder in
     good faith and in accordance with such advice or opinion. Such legal
     counsel may be legal counsel to the Guarantor, the Additional Guarantor or
     any of their Affiliates and may be one of their employees. The Guarantee
     Trustee shall have the right at any time to seek instructions concerning
     the administration of this Guarantee Agreement from any court of competent
     jurisdiction.





                                     - 7 -
<PAGE>   8
          (v) The Guarantee Trustee shall be under no obligation to exercise any
     of the rights or powers vested in it by this Guarantee Agreement at the
     request or direction of any Holder, unless such Holder shall have provided
     to the Guarantee Trustee such adequate security and indemnity as would
     satisfy a reasonable person in the position of the Guarantee Trustee
     against the costs, expenses (including attorneys' fees and expenses) and
     liabilities that might be incurred by it in complying with such request or
     direction, including such reasonable advances as may be requested by the
     Guarantee Trustee; provided that, nothing contained in this Section
     302(a)(v) shall be taken to relieve the Guarantee Trustee, upon the
     occurrence of an Event of Default or an Additional Guarantor Event of
     Default, of its obligation to exercise the rights and powers vested in it
     by this Guarantee Agreement.

ARTICLE V.    Subparagraph (a) (i) and paragraph (c) of Section 401 of the
Guarantee Agreement are hereby amended to read in their entirety as follows:

SECTION 401.      Guarantee Trustee; Eligibility

     (a) There shall at all times be a Guarantee Trustee which shall:

          (i) not be an Affiliate of the Guarantor or the Additional Guarantor;

     (c) If the Guarantee Trustee has or shall acquire any "conflicting
interest" within the meaning of Section 310(b) of the Trust Indenture Act, the
Guarantee Trustee, Guarantor and Additional Guarantor shall in all respects
comply with the provisions of Section 310(b) of the Trust Indenture Act.

ARTICLE VI.    Section 801 of the Guarantee Agreement is hereby amended to read
in its entirety as follows:

SECTION 801.     Successors and Assigns

          All guarantees and agreements of the Guarantor and the Additional 
Guarantor contained in this Guarantee Agreement shall bind the successors,
assigns, receivers, trustees and representatives of the Guarantor and the
Additional Guarantor, as applicable, and shall inure to the benefit of the
Holders of the Preferred Securities then outstanding. Except in connection with
a consolidation, merger or sale involving the Guarantor that is permitted under
Article Eight of the Indenture, and pursuant to which the assignee agrees in
writing to perform the Guarantor's obligations hereunder, the Guarantor shall
not assign its obligations hereunder. In the event that the Additional Guarantor
shall assign its obligations hereunder, the Additional Guarantor shall be
discharged from all obligations and covenants of the Additional Guarantor
hereunder to the fullest extent permitted by law.





                                     - 8 -
<PAGE>   9

ARTICLE VII.   Section 803 of the Guarantee Agreement is hereby amended by
adding, immediately after paragraph (c) thereto, a new paragraph (d) which
shall read in its entirety as follows:

     (d) if given to the Additional Guarantor, to the address set forth below or
such other address, facsimile number or to the attention of such other Person as
the Additional Guarantor may give notice of to the Holders:

                                  MCI WORLDCOM, Inc.
                                  515 East Amite St.
                                  Jackson, MS 39201
                                  Facsimile No.: 601-360-8110
                                  Attention:  Treasurer

with a copy to:

                                  MCI WORLDCOM, Inc.
                                  10777 Sunset Office Dr.
                                  Suite 330
                                  St. Louis, MO 63127
                                  Facsimile No.: 314 909-4101
                                  Attention:  P. Bruce Borghardt

with a copy to:

                                  MCI Communications Corporation
                                  1801 Pennsylvania Ave, N.W.
                                  Washington, D.C. 20006
                                  Facsimile No: (202) 887-2846
                                  Attention:  Assistant Treasurer


ARTICLE VIII.  Miscellaneous Provisions.

     SECTION 1. Capitalized terms used but not otherwise defined in this
Supplement No. 1 shall have the meanings ascribed thereto in the Guarantee
Agreement. The Article and Section headings herein are for convenience only and
shall not affect the construction hereof. This Supplement No. 1 may be executed
in counterparts.

     SECTION 2. THIS SUPPLEMENT NO. 1 SHALL BE DEEMED TO BE A CONTRACT MADE
UNDER THE LAWS OF THE STATE OF NEW YORK AND SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO CONFLICT
OF LAWS PRINCIPLES THEREOF.





                                     - 9 -
<PAGE>   10
     SECTION 3. The Guarantee Agreement, as supplemented and amended by this
Supplement No. 1, is in all respects hereby adopted, ratified and confirmed and
all terms not supplemented and amended hereby remain in full force and effect.

                  [Remainder of Page Intentionally Left Blank]





                                     - 10 -
<PAGE>   11
     IN WITNESS WHEREOF, the parties hereto have caused this Supplement No. 1 to
be duly executed as of the day and year first above written.

                               WILMINGTON TRUST COMPANY, as
                               Guarantee Trustee

                               By: /s/ JAMES P. LAWLER 
                                  ---------------------------------------------
                                   name:    James P. Lawler
                                   title:   Vice President


                               MCI WORLDCOM, INC.


                               By: /s/ SCOTT D. SULLIVAN
                                  ---------------------------------------------
                                   name:    Scott D. Sullivan
                                   title:   Chief Financial Officer



                               MCI COMMUNICATIONS CORPORATION


                               By: /s/ SCOTT D. SULLIVAN
                                  ---------------------------------------------
                                   name:    Scott D. Sullivan
                                   title:   Chief Financial Officer





                                     - 11 -

<PAGE>   1
                                                                    EXHIBIT 4.10




              TRUST AGREEMENT GUARANTEE (this "Agreement"), dated as of
November 12, 1998, among Wilmington Trust Company ("Wilmington"), a Delaware 
banking corporation duly organized and existing under the laws of Delaware, as 
property trustee and Delaware trustee (in each such capacity, the "Property 
Trustee" and the "Delaware Trustee", respectively), the undersigned 
administrative trustee (the "Administrative Trustee", and together with the
Property Trustee and the Delaware Trustee, the "Trustees"),  MCI Communications
Corporation, a Delaware corporation, formerly known as TC Investments Corp
("MCI" or the "Company"), and MCI WORLDCOM, Inc., a Georgia corporation ("MCI
WorldCom" or the "Guarantor").

              WHEREAS, MCI and the Trustees are parties to an Amended and
Restated Trust Agreement, dated as of May 29, 1996 (the "Trust Agreement"),
pursuant to which (i) they declared and established MCI Capital I, a Delaware
business trust (the "Trust") pursuant to the Delaware Business Trust Act (ii)
the Trust issued to the public $750,000,000 aggregate liquidation amount of its
8.00% Cumulative Quarterly Income Preferred Securities, Series A (the
"Preferred Securities"), representing undivided beneficial interests in the
assets of the Trust, (iii) the Trust issued to MCI $23,195,900 of its Common
Securities (the "Common Securities"), and (iv) the Trust used the proceeds of
the issuance of the Preferred Securities and Common Securities to purchase
$773,195,900 in aggregate principal amount of the Company's 8.00% Junior
Subordinated Deferrable Interest Debentures, Series A (the "Debentures"),
issued pursuant to that certain indenture dated as of May 29, 1996 (as
supplemented, the "Indenture") by and between MCI and Wilmington, as trustee
(in such capacity, the "Indenture Trustee"); and

              WHEREAS, the Guarantor desires to unconditionally and irrevocably
guarantee, on a subordinated basis, the full and punctual payment and
performance (within applicable grace periods) of all the obligations of the
Company in its capacity as depositor under the Trust Agreement (in such
capacity, the "Depositor").

              NOW, THEREFORE, the Company, the Guarantor and the Trustees hereby
agree as follows:

              SECTION 1.  Definitions.  Capitalized terms used but not defined
herein have the meanings ascribed to them in the Trust Agreement.  In addition,
the following terms shall have the following meanings:

              "Debt" means, with respect to any Person, whether recourse is to
all or a portion of the assets of such Person and whether or not contingent,
(i) every obligation of such Person for money borrowed; (ii) every obligation
of such Person evidenced by bonds, debentures, notes or other similar
instruments, including obligations incurred in connection with the acquisition
of property, assets or businesses; (iii) every reimbursement obligation of such
Person with respect to letters of credit, bankers' acceptances or similar
facilities issued 

<PAGE>   2
for the account of such Person; (iv) every obligation of such Person issued
or assumed as the deferred purchase price of property or services (but
excluding trade accounts payable or accrued liabilities arising in the ordinary
course of business); (v) every capital lease obligation of such Person; and
(vi) every guarantee of or responsibility or liability for, direct or indirect,
as obligor or otherwise (a) any obligation of the types referred to in clauses
(i) through (v) of another Person or (b) the payment of any and all dividends
of another Person.

              "Guarantee" shall have the meaning ascribed to it in Section 2 of
this Agreement.

              "Guarantor Senior Debt" means the principal of (and premium, if
any) and interest, if any (including, without limitation, interest accruing on
or after the filing of any petition in bankruptcy or for reorganization
relating to the Guarantor whether or not such claim for post-petition interest
is allowed in such proceeding), on Debt of the Guarantor, whether incurred on
or prior to the date of this Agreement or thereafter incurred, unless, in the
instrument creating or evidencing the same or pursuant to which the same is
outstanding, it is expressly provided that such obligations are not superior in
right of payment to the Guarantee or to other Debt of the Guarantor which is
pari passu with, or subordinated to, the Guarantee, provided, however, that
Guarantor Senior Debt shall not be deemed to include (a) any Debt of the
Guarantor which, when incurred and without respect to any election under
Section 1111(b) of the Bankruptcy Reform Act of 1978, was without recourse to
the Guarantor, (b) any Debt of the Guarantor to any of its Subsidiaries, other
than Debt to a Subsidiary the proceeds of which the Guarantor used to pay
Guarantor Senior Debt (c) any Debt to any employee of the Guarantor, (d) any
liability for taxes, or (e) any Debt or other monetary obligations to trade
creditors created or assumed by the Guarantor or any of its Subsidiaries in the
ordinary course of business in connection with the obtaining of goods,
materials or services.

              "Holder"  shall mean any holder, as registered on the books and
records of the Trust, of any Preferred Securities.

              "Indenture" shall have the meaning ascribed to it in the
Recitals.

              "Subsidiary" of any Person means a corporation more than 50% of
the outstanding voting stock of which is owned, directly or indirectly, by such
Person or one or more other Subsidiaries of such Person, or by such Person and
one or more other Subsidiaries of such Person.  For purposes of this
definition, "voting stock" means stock which ordinarily has voting power for
the election of directors, whether at all times or only so long as no senior
class of stock has such voting power by reason of any contingency.

              SECTION 2.  The Guarantee.  (a)  The Guarantor irrevocably and
unconditionally guarantees on a subordinated basis as set forth herein (the
"Guarantee"), to each Holder of Preferred Securities and to the Trustees and
their successors and assigns (without duplication of amounts theretofore paid
by the Depositor), the full and punctual payment and performance (within
applicable grace periods) of all the obligations of the Depositor under the
Trust Agreement.


                                     -2-
<PAGE>   3
              (b)  The Guarantor further agrees that the Guarantee constitutes
a guarantee of payment, performance and compliance and not merely of
collection.

              (c)  The Guarantor's obligation to make any payment hereunder may
be satisfied by causing the Depositor to make such payment.

              (d)  The Guarantor also agrees to pay any and all costs and
expenses (including reasonable attorneys' fees) incurred by the Trustees or any
Holder of Preferred Securities in enforcing any of their respective rights
under the Guarantee.

              (e)  Except as specifically provided herein, the obligations of
the Depositor under the Trust Agreement remain in full force and effect.

              SECTION 3.  Waiver of Notice and Demand.  The Guarantor hereby
waives notice of acceptance of the Guarantee and of any liability to which it
applies or may apply, presentment, demand for payment, any right to require a
proceeding first against the Depositor, any Trustee, the Trust or any other
Person before proceeding against the Guarantor, protest, notice of nonpayment,
notice of dishonor, notice of redemption and all other notices and demands.

              SECTION 4.  Obligations Not Affected.  The obligations,
covenants, agreements and duties of the Guarantor under the Guarantee shall in
no way be affected or impaired by reason of the happening from time to time of
any of the following:

              (a)  the release or waiver, by operation of law or otherwise, of
the performance or observance by the Depositor of any express or implied
agreement, covenant, term or condition relating to the Trust Agreement or the
Preferred Securities to be performed or observed by the Depositor;

              (b)  the extension of time for the payment by the Depositor of
all or any portion of (i) any payment of any monetary obligation of the
Depositor under the Trust Agreement (including obligations to the Trustees) and
the Preferred Securities, or (ii) the extension of time for the full and
punctual performance within applicable grace periods of all other obligations
of the Depositor under the Trust Agreement and the Preferred Securities;

              (c)  any failure, omission, delay or lack of diligence on the
part of the Holders of the Preferred Securities or the Trustees to enforce,
assert or exercise any right, privilege, power or remedy conferred on the
Holders of the Preferred Securities or the Trustees pursuant to the terms of
the Trust Agreement or the Preferred Securities, or any action on the part of
the Depositor granting indulgence or extension of any kind;

              (d)  voluntary or involuntary liquidation, dissolution, sale of
any collateral, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition or readjustment
of debt of, or other similar proceedings affecting, the Depositor or any of the
assets of the Depositor;


                                     -3-
<PAGE>   4
              (e)  any invalidity of, or defect or deficiency in, the Preferred
Securities or the Trust Agreement;

              (f)  the settlement or compromise of any obligation guaranteed
hereby or hereby incurred; or

              (g)  any other circumstance whatsoever that might otherwise
constitute a legal or equitable discharge or defense of a guarantor, it being
the intent of this Agreement that the obligations of the Guarantor hereunder
shall be absolute and unconditional under any and all circumstances.

              There shall be no obligation of the Holders of the Preferred
Securities or the Trustees to give notice to, or obtain the consent of, the
Guarantor with respect to the happening of any of the foregoing.

              SECTION 5.  Subordination.  (a)  Guarantee Subordinate to
Guarantor Senior Debt.  The Guarantee is hereby expressly subordinated in right
of payment to the prior payment in full of all Guarantor Senior Debt, and such
subordination is for the benefit of the holders of such Guarantor Senior Debt.

              (b)  Payment Over of Proceeds Upon Dissolution, Etc.  In case of
the pendency of any receivership, insolvency, liquidation, bankruptcy,
reorganization, arrangement, adjustment, composition or other judicial
proceeding relative to the Guarantor (each such event, if any, herein sometimes
referred to as a "Proceeding"), then the holders of Guarantor Senior Debt shall
be entitled to receive payment in full of principal of (and premium, if any)
and interest, if any, on such Guarantor Senior Debt, or provision shall be made
for such payment in cash or cash equivalents or otherwise in a manner
satisfactory to the holders of Guarantor Senior Debt, before any payment is
made in respect of the Guarantee.

              In the event that, notwithstanding the foregoing provisions of
this Section, any Trustee or any Holder of the Preferred Securities shall have
received any payment of the Guarantor in respect of the Guarantee, before all
Guarantor Senior Debt is paid in full or payment thereof is provided for in
cash or cash equivalents or otherwise in a manner satisfactory to the holders
of Guarantor Senior Debt, and if such fact shall, at or prior to the time of
such payment or distribution, have been made known to such Trustee or, as the
case may be, such Holder, then and in such event such payment or distribution
shall be paid over or delivered forthwith to the trustee in bankruptcy,
receiver, liquidating trustee, custodian, assignee, agent or other Person
making payment or distribution of assets of the Guarantor for application to
the payment of all Guarantor Senior Debt remaining unpaid, to the extent
necessary to pay all Guarantor Senior Debt in full, after giving effect to any
concurrent payment or distribution to or for the holders of Guarantor Senior
Debt.


                                     -4-
<PAGE>   5
              (c)  Prior Payment of Guarantor Senior Debt.  In the event that
any payments are due pursuant to the Guarantee, then and in such event the
holders of the Guarantor Senior Debt shall be entitled to receive payment in
full of all amounts due on or in respect of such Guarantor Senior Debt
(including any amounts due upon acceleration or otherwise), or provision shall
be made for such payment in cash or cash equivalents or otherwise in a manner
satisfactory to the holders of Guarantor Senior Debt, before any payments are
made on account of the Guarantee.

              In the event that, notwithstanding the foregoing, the Guarantor
shall make any payment to any Trustee or any Holder of the Preferred Securities
prohibited by the foregoing provisions of this Section 5(c), and if such fact
shall, at or prior to the time of such payment, have been made known to such
Trustee or, as the case may be, such Holder, then and in such event such
payment shall be paid over and delivered forthwith to the Guarantor.

              The provisions of this Section 5(c) shall not apply to any
payment with respect to which Section 5(b) of this Agreement would be
applicable.

              (d)  No Payment When Guarantor Senior Debt in Default.  (i) In
the event and during the continuation of any default in the payment of
principal of (or premium, if any) or interest on any Guarantor Senior Debt, or
in the event that any event of default with respect to any Guarantor Senior
Debt shall have occurred and be continuing and shall have resulted in such
Guarantor Senior Debt becoming or being declared due and payable prior to the
date on which it would otherwise have become due and payable, unless and until
such event of default shall have been cured or waived or shall have ceased to
exist and such acceleration shall have been rescinded or annulled, or (ii) in
the event any judicial proceeding shall be pending with respect to any default
in payment or such event of default, then no payment shall be made by the
Guarantor on account of the Guarantee.

              In the event that, notwithstanding the foregoing, the Guarantor
shall make any payment to any Trustee or any Holder of any Preferred Security
prohibited by the foregoing provisions of this Section 5(d), and if such fact
shall, at or prior to the time of such payment, have been made known to such
Trustee or, as the case may be, such Holder, then and in such event such
payment shall be paid over and delivered forthwith to the Guarantor.

              The provisions of this Section 5(d) shall not apply to any
payment with respect to which Section 5(b) of this Agreement would be
applicable.

              (e)  Payment Permitted If No Default.  Nothing contained in this
Section 5 or elsewhere in this Agreement or in the Trust Agreement or in the
Preferred Securities shall prevent (i) the Guarantor, at any time except during
the pendency of any Proceeding referred to in Section 5(b) of this Agreement or
under the conditions described in Sections 5(c) and 5(d) of this Agreement,
from making payments at any time in respect of the Guarantee.


                                     -5-
<PAGE>   6
              (f)  Subrogation to Rights of Holders of Guarantor Senior Debt.
Subject to the payment in full of all Guarantor Senior Debt, or the provision
for such payment in cash or cash equivalents or otherwise in a manner
satisfactory to the holders of Guarantor Senior Debt, the Trustees and the
Holders of the Preferred Securities shall be subrogated to the extent of the
payments or distributions made to the holders of such Guarantor Senior Debt
pursuant to the provisions of this Section 5 (equally and ratably with the
holders of all indebtedness of the Guarantor which by its express terms is
subordinated to Guarantor Senior Debt to substantially the same extent as the
Guarantee is subordinated to the Guarantor Senior Debt and is entitled to like
rights of subrogation by reason of any payments or distributions made to
holders of such Guarantor Senior Debt) to the rights of the holders of such
Guarantor Senior Debt to receive payments and distributions of cash, property
and securities applicable to the Guarantor Senior Debt until the payments due
under the Guarantee shall be paid in full.  For purposes of such subrogation,
no payments or distributions to the holders of the Guarantor Senior Debt of any
cash, property or securities to which the Holders of the Preferred Securities
or the Trustees would be entitled except for the provisions of this Section 5,
and no payments over pursuant to the provisions of this Section 5 to the
holders of Guarantor Senior Debt by Holders of the Preferred Securities or the
Trustees, shall, as among the Guarantor, its creditors other than holders of
Guarantor Senior Debt, and the Holders of the Preferred Securities and the
Trustees, be deemed to be a payment or distribution by the Guarantor to or on
account of the Guarantor Senior Debt.

              (g)  Provisions Solely to Define Relative Rights.  The provisions
of this Section 5 are and are intended solely for the purpose of defining the
relative rights of the Holders of the Preferred Securities and the Trustees on
the one hand and the holders of Guarantor Senior Debt on the other hand.
Nothing contained in this Section 5 or elsewhere in this Agreement or in the
Trust Agreement or in the Preferred Securities is intended to or shall (i)
impair, as between the Guarantor and the Holders of the Preferred Securities
and the Trustees, the obligations of the Guarantor, which are absolute and
unconditional, to pay to the Holders of the Preferred Securities and the
Trustees all payments due on the Guarantee; or (ii) affect the relative rights
against the Guarantor of the Holders of the Preferred Securities or the
Trustees and creditors of the Guarantor other than their rights in relation to
the holders of Guarantor Senior Debt; or (iii) prevent the Trustees or the
Holders of the Preferred Securities from exercising all remedies otherwise
permitted by applicable law upon default under this Agreement, including,
without limitation, filing and voting claims in any Proceeding, subject to the
rights, if any, under this Section 5 of the holders of Guarantor Senior Debt to
receive cash, property and securities otherwise payable or deliverable to the
Trustees or such Holders.

              (h)  No Waiver of Subordination Provisions.  No right of any
present or future holder of any Guarantor Senior Debt to enforce subordination
as herein provided shall at any time in any way be prejudiced or impaired by
any act or failure to act on the part of the Guarantor or by any act or failure
to act, in good faith, by any such holder, or by any noncompliance by the
Guarantor with the terms, provisions and covenants of this Section 5,
regardless of any knowledge thereof that any such holder may have or be
otherwise charged with.


                                     -6-
<PAGE>   7
              SECTION 6.  Subrogation to Rights of Depositor.  The Guarantor
shall be subrogated to all (if any) rights of the Depositor in respect of any
amounts paid by the Guarantor under this Agreement; provided, however, that the
Guarantor shall not (except to the extent required by mandatory provisions of
law) be entitled to enforce or exercise any rights which it may acquire by way
of subrogation or any indemnity, reimbursement or other agreement, in all cases
as a result of payment under this Agreement, if, at the time of any such
payment, any amounts are due and unpaid under this Agreement.

              SECTION 7.  GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD
TO THE CONFLICT OF LAWS PRINCIPLES THEREOF.

              SECTION 8.  Counterparts.  This Agreement may be executed in two
or more counterparts, each of which shall constitute an original, but all of
which when taken together shall constitute but one instrument.

              SECTION 9.  Headings.  The headings of this Agreement are for
reference only and shall not limit or otherwise affect the meaning hereof.

              SECTION 10.  Separability.  In case any one or more of the
provisions contained in this Agreement shall for any reason be held to be
invalid, illegal or unenforceable in any respect, such invalidity, illegality
or unenforceability shall not affect any other provision of this Agreement, but
this Agreement shall be construed as if such invalid or illegal or
unenforceable provision had never been contained herein.

              SECTION 11.  Termination.  This Agreement shall terminate
automatically upon the termination of the Trust Agreement in accordance with
its terms.

              SECTION 13.  Successors and Assigns.  All guarantees and
agreements of the Guarantor contained in this Agreement shall bind the
successors, assigns, receivers, trustees and representatives of the Guarantor
and shall inure to the benefit of the Trustees and the Holders of the Preferred
Securities then outstanding.  In the event that the Guarantor shall assign its
obligations contained in this Agreement, the Guarantor shall be discharged from
all obligations and covenants of the Guarantor under this Agreement to the
fullest extent permitted by law.


                                     -7-
<PAGE>   8
              IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be duly executed as of the day and year first above written.

 
                                   WILMINGTON TRUST COMPANY, as
                                   Delaware Trustee and Property Trustee


                                   By:   /s/ JAMES P. LAWLER
                                      ------------------------------------------
                                         Name:    James P. Lawler
                                         Title:   Vice President


                                         /s/ SCOTT D. SULLIVAN                
                                      ------------------------------------------
                                         Scott D. Sullivan, as
                                         Administrative Trustee


                                   MCI WORLDCOM, INC.


                                   By:   /s/ SCOTT D. SULLIVAN
                                      ------------------------------------------
                                         Name:    Scott D. Sullivan
                                         Title:   Chief Financial Officer


                                   MCI COMMUNICATION CORPORATION


                                   By:   /s/ SCOTT D. SULLIVAN
                                      ------------------------------------------
                                         Name:    Scott D. Sullivan
                                         Title:   Chief Financial Officer



                                     -8-

<PAGE>   1
                                                                    EXHIBIT 4.11

          EXPENSE AGREEMENT GUARANTEE (this "Agreement"), dated as of November 
12, 1998, between MCI WORLDCOM, Inc., a Georgia corporation, formerly known as
WorldCom, Inc. ("MCI WorldCom" or the "Guarantor"), and MCI Capital I, a
Delaware business trust (the "Trust").

          WHEREAS, MCI Communications Corporation (formerly known as TC 
Investments Corp.), a Delaware corporation and a wholly owned subsidiary of MCI
WorldCom ("MCI" or the "Company"), and the Trust are parties to that certain
Agreement as to Expenses and Liabilities (the "Expense Agreement"), dated as of
May 29, 1996, pursuant to which MCI has irrevocably and unconditionally
guaranteed to each Beneficiary (as defined in the Expense Agreement) the full
payment when and as due of any and all Obligations (as defined in the Expense
Agreement) of the Trust; and

          WHEREAS, pursuant to the terms of an Amended and Restated Trust 
Agreement, dated as of May 29, 1996 (the "Trust Agreement"), the Trust has (i)
issued to the public $750,000,000 aggregate liquidation amount of its 8.00%
Cumulative Quarterly Income Preferred Securities, Series A (the "Preferred
Securities"), representing undivided beneficial interests in the assets of the
Trust, (ii) issued to MCI, in its capacity as depositor of the Trust,
$23,195,900 of its Common Securities (the "Common Securities"), and (iii) used
the proceeds of the issuance of the Preferred Securities and Common Securities
to purchase from MCI $773,195,900 in aggregate principal amount of MCI's 8.00%
Junior Subordinated Deferrable Interest Debentures, Series A (the "Debentures"),
issued pursuant to a Junior Subordinated Indenture (the "Indenture"), dated as
of May 29, 1996; and

          WHEREAS, the Guarantor desires to unconditionally and irrevocably
guarantee, on a subordinated basis, the full and punctual payment and
performance (within applicable grace periods) of all the obligations of the
Company under the Expense Agreement;

          NOW, THEREFORE, the Guarantor and the Trust hereby agree as follows:

          SECTION 1. Definitions. Capitalized terms used but not defined herein
have the meanings ascribed to them in the Expense Agreement. In addition, the
following terms shall have the following meanings:

          "Company" shall have the meaning set forth in the Recitals.

          "Debt" means, with respect to any Person, whether recourse is to all 
or a portion of the assets of such Person and whether or not contingent, (i)
every obligation of such Person for money borrowed; (ii) every obligation of
such Person evidenced by bonds, debentures, notes or other similar instruments,
including obligations incurred in connection with the acquisition of property,
assets or businesses; (iii) every reimbursement obligation of such Person with
respect to letters of credit, bankers' acceptances or similar facilities issued




<PAGE>   2

for the account of such Person; (iv) every obligation of such Person issued or
assumed as the deferred purchase price of property or services (but excluding
trade accounts payable or accrued liabilities arising in the ordinary course of
business); (v) every capital lease obligation of such Person; and (vi) every
guarantee of or responsibility or liability for, direct or indirect, as obligor
or otherwise (a) any obligation of the types referred to in clauses (i) through
(v) of another Person or (b) the payment of any and all dividends of another
Person.

          "Guarantee" shall have the meaning set forth in Section 2 hereof.

          "Guarantor" shall have the meaning set forth in the Recitals.

          "Guarantor Senior Debt" means the principal of (and premium, if any) 
and interest, if any (including, without limitation, interest accruing on or
after the filing of any petition in bankruptcy or for reorganization relating to
the Guarantor whether or not such claim for post-petition interest is allowed in
such proceeding), on Debt of the Guarantor, whether incurred on or prior to the
date of this Agreement or thereafter incurred, unless, in the instrument
creating or evidencing the same or pursuant to which the same is outstanding, it
is expressly provided that such obligations are not superior in right of payment
to the Guarantee or to other Debt of the Guarantor which is pari passu with, or
subordinated to, the Guarantee, provided, however, that Guarantor Senior Debt
shall not be deemed to include (a) any Debt of the Guarantor which, when
incurred and without respect to any election under Section 1111(b) of the
Bankruptcy Reform Act of 1978, was without recourse to the Guarantor, (b) any
Debt of the Guarantor to any of its Subsidiaries, other than Debt to a
Subsidiary the proceeds of which the Guarantor used to pay Guarantor Senior Debt
(c) any Debt to any employee of the Guarantor, (d) any liability for taxes or
(e) any Debt or other monetary obligations to trade creditors created or assumed
by the Guarantor or any of its Subsidiaries in the ordinary course of business
in connection with the obtaining of goods, materials or services.

          "Indenture" shall have the meaning ascribed to it in the Recitals.

          "Preferred Securities" shall have the meaning ascribed thereto in the
Recitals.

          "MCI WorldCom" shall have the meaning set forth in the Recitals.

          "Subsidiary" of any Person means a corporation more than 50% of the
outstanding voting stock of which is owned, directly or indirectly, by such
Person or one or more other Subsidiaries of such Person, or by such Person and
one or more other Subsidiaries of such Person. For purposes of this definition,
"voting stock" means stock which ordinarily has voting power for the election of
directors, whether at all times or only so long as no senior class of stock has
such voting power by reason of any contingency.

          SECTION 2. The Guarantee. (a) Subject to the terms and conditions 
hereof, the Guarantor hereby irrevocably and unconditionally guarantees, on a
subordinated basis as set forth herein (the "Guarantee"), to each Beneficiary
(without duplication of amounts theretofore paid by the Trust or the Company),
the full payment, when and as due, of any and

                                      - 2 -

<PAGE>   3
all obligations of the Company under the Expense Agreement. This Guarantee is
intended to be for the benefit of, and to be enforceable by, all such
Beneficiaries, whether or not such Beneficiaries have received notice hereof.

          (b) Except as provided herein, the obligations of the Company under 
the Expense Agreement remain in full force and effect.

          SECTION 3. Waiver of Notice. The Guarantor hereby waives notice of
acceptance of the Guarantee and of any liability to which it applies or may
apply, and the Guarantor hereby waives presentment, demand for payment, protest,
notice of nonpayment, notice of dishonor, notice of redemption and all other
notices and demands.

          SECTION 4. No Impairment. The obligations, covenants, agreements and 
duties of the Guarantor under the Guarantee shall in no way be affected or
impaired by reason of the happening from time to time of any of the following:

          (a) the extension of time for the payment by the Company of all or any
portion of any monetary obligation of the Company under the Expense Agreement,
or for the performance of any other obligations of the Company under, arising
out of, or in connection with the Expense Agreement;

          (b) any failure, omission, delay or lack of diligence on the part of
the Beneficiaries to enforce, assert or exercise any right, privilege, power or
remedy conferred on the Beneficiaries pursuant to the terms of the Expense
Agreement, or any action on the part of the Company or the Trust granting
indulgence or extension of any kind;

          (c) the voluntary or involuntary liquidation, dissolution, sale of any
collateral, receivership, insolvency, bankruptcy, assignment for the benefit of
creditors, reorganization, arrangement, composition or readjustment of debt of,
or other similar proceedings affecting, the Company or the Trust or any of the
assets of the Company or the Trust.

          There shall be no obligation of the Beneficiaries to give notice to,
or obtain the consent of, the Guarantor with respect to the happening of any of
the foregoing.

          SECTION 5. Subordination. (a) Guarantee Subordinate to Guarantor 
Senior Debt. The Guarantee is hereby expressly subordinated in right of payment,
to the prior payment in full of all Guarantor Senior Debt, and such
subordination is for the benefit of the holders of such Guarantor Senior Debt.

          (b) Payment Over of Proceeds Upon Dissolution, Etc. In case of the 
pendency of any receivership, insolvency, liquidation, bankruptcy,
reorganization, arrangement, adjustment, composition or other judicial
proceeding relative to the Guarantor (each such event, if any, herein sometimes
referred to as a "Proceeding"), then the holders of Guarantor Senior Debt shall
be entitled to receive payment in full of principal of (and premium, if any) and
interest, if any, on such Guarantor Senior Debt, or provision shall be made for
such

                                      - 3 -



<PAGE>   4

payment in cash or cash equivalents or otherwise in a manner satisfactory to the
holders of Guarantor Senior Debt, before any payment is made in respect of the
Guarantee.

          In the event that, notwithstanding the foregoing provisions of this
Section, any Beneficiary shall have received any payment of the Guarantor in
respect of the Guarantee, before all Guarantor Senior Debt is paid in full or
payment thereof is provided for in cash or cash equivalents or otherwise in a
manner satisfactory to the holders of Guarantor Senior Debt, and if such fact
shall, at or prior to the time of such payment or distribution, have been made
known to such Beneficiary, then and in such event such payment or distribution
shall be paid over or delivered forthwith to the trustee in bankruptcy,
receiver, liquidating trustee, custodian, assignee, agent or other Person making
payment or distribution of assets of the Guarantor for application to the
payment of all Guarantor Senior Debt remaining unpaid, to the extent necessary
to pay all Guarantor Senior Debt in full, after giving effect to any concurrent
payment or distribution to or for the holders of Guarantor Senior Debt.

          (c) Prior Payment of Guarantor Senior Debt. In the event that any 
payments are due pursuant to the Guarantee, then and in such event the holders
of the Guarantor Senior Debt shall be entitled to receive payment in full of all
amounts due on or in respect of such Guarantor Senior Debt (including any
amounts due upon acceleration or otherwise), or provision shall be made for such
payment in cash or cash equivalents or otherwise in a manner satisfactory to the
holders of Guarantor Senior Debt, before any payments are made on account of the
Guarantee.

          In the event that, notwithstanding the foregoing, the Guarantor shall
make any payment to any Beneficiary prohibited by the foregoing provisions of
this Section 5(c), and if such fact shall, at or prior to the time of such
payment, have been made known to such Beneficiary, then and in such event such
payment shall be paid over and delivered forthwith to the Guarantor.

          The provisions of this Section 5(c) shall not apply to any payment 
with respect to which Section 5(b) of this Agreement would be applicable.

          (d) No Payment When Guarantor Senior Debt in Default. (i) In the 
event and during the continuation of any default in the payment of principal of
(or premium, if any) or interest on any Guarantor Senior Debt, or in the event
that any event of default with respect to any Guarantor Senior Debt shall have
occurred and be continuing and shall have resulted in such Guarantor Senior Debt
becoming or being declared due and payable prior to the date on which it would
otherwise have become due and payable, unless and until such event of default
shall have been cured or waived or shall have ceased to exist and such
acceleration shall have been rescinded or annulled, or (ii) in the event any
judicial proceeding shall be pending with respect to any default in payment or
such event of default, then no payment shall be made by the Guarantor on account
of the Guarantee.

                                      - 4 -


<PAGE>   5

          In the event that, notwithstanding the foregoing, the Guarantor shall 
make any payment to any Beneficiary, prohibited by the foregoing provisions of
this Section 5(d), and if such fact shall, at or prior to the time of such
payment, have been made known to such Beneficiary then and in such event such
payment shall be paid over and delivered forthwith to the Guarantor.

          The provisions of this Section 5(d) shall not apply to any payment 
with respect to which Section 5(b) of this Agreement would be applicable.

          (e) Payment Permitted If No Default. Nothing contained in this 
Section 5 or elsewhere in this Agreement or the Expense Agreement shall prevent
(i) the Guarantor, at any time except during the pendency of any proceeding
referred to in Section 5(b) of this Agreement or under the conditions described
in Sections 5(c) and 5(d) of this Agreement, from making payments at any time in
respect of this Guarantee.

          (f) Subrogation to Rights of Holders of Guarantor Senior Debt. 
Subject to the payment in full of all Guarantor Senior Debt, or the provision
for such payment in cash or cash equivalents or otherwise in a manner
satisfactory to the holders of Guarantor Senior Debt, the Beneficiaries shall be
subrogated to the extent of the payments or distributions made to the holders of
such Guarantor Senior Debt pursuant to the provisions of this Section 5 (equally
and ratably with the holders of all indebtedness of the Guarantor which by its
express terms is subordinated to Guarantor Senior Debt to substantially the same
extent as the Guarantee is subordinated to the Guarantor Senior Debt and is
entitled to like rights of subrogation by reason of any payments or
distributions made to holders of such Guarantor Senior Debt) to the rights of
the holders of such Guarantor Senior Debt to receive payments and distributions
of cash, property and securities applicable to the Guarantor Senior Debt until
the payments due under the Guarantee shall be paid in full. For purposes of such
subrogation, no payments or distributions to the holders of the Guarantor Senior
Debt of any cash, property or securities to which the Beneficiaries would be
entitled except for the provisions of this Section 5, and no payments over
pursuant to the provisions of this Section 5 to the holders of Guarantor Senior
Debt by any Beneficiary, shall, as among the Guarantor, its creditors other than
holders of Guarantor Senior Debt, and the Beneficiaries, be deemed to be a
payment or distribution by the Guarantor to or on account of the Guarantor
Senior Debt.

          (g) Provisions Solely to Define Relative Rights. The provisions of 
this Section 5 are and are intended solely for the purpose of defining the
relative rights of the Beneficiaries on the one hand and the holders of
Guarantor Senior Debt on the other hand. Nothing contained in this Section 5 or
elsewhere in this Agreement or in the Expense Agreement is intended to or shall
(i) impair, as between the Guarantor and the Beneficiaries, the obligations of
the Guarantor, which are absolute and unconditional, to pay to the
Beneficiaries, all payments due on the Guarantee; or (ii) affect the relative
rights against the Guarantor of the Beneficiaries and creditors of the Guarantor
other than their rights in relation to the holders of Guarantor Senior Debt; or
(iii) prevent the Beneficiaries from exercising all remedies otherwise permitted
by applicable law upon default under this Agreement, including, without
limitation, filing and voting claims in any Proceeding, subject to the rights,
if any, under this Section 5 of the holders of Guarantor Senior Debt to receive
cash, property and securities otherwise payable or deliverable to the
Beneficiaries.

                                      - 5 -


<PAGE>   6

          (h) No Waiver of Subordination Provisions. No right of any present or
future holder of any Guarantor Senior Debt to enforce subordination as herein
provided shall at any time in any way be prejudiced or impaired by any act or
failure to act on the part of the Guarantor or by any act or failure to act, in
good faith, by any such holder, or by any noncompliance by the Guarantor with
the terms, provisions and covenants of this Section 5, regardless of any
knowledge thereof that any such holder may have or be otherwise charged with.

          SECTION 6. Enforcement. A Beneficiary may enforce this Agreement 
directly against the Guarantor and the Guarantor waives any right or remedy to
require that any action be brought against the Trust, the Company or any other
person or entity before proceeding against the Guarantor.

          SECTION 7. Subrogation. The Guarantor shall be subrogated to all (if 
any) rights of the Company and the Trust in respect of any amounts paid to the
Beneficiaries by the Guarantor under this Agreement; provided, however, that the
Guarantor shall not (except to the extent required by mandatory provisions of
law) be entitled to enforce or exercise any rights which it may acquire by way
of subrogation or any indemnity, reimbursement or other agreement, in all cases
as a result of payment under this Agreement, if, at the time of any such
payment, any amounts are due and unpaid under this Agreement.

          SECTION 8. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED AND 
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
THE CONFLICT OF LAWS PRINCIPLES THEREOF.

          SECTION 9. Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall constitute an original, but all of which when
taken together shall constitute but one instrument.

          SECTION 10. Headings. The headings of this Agreement are for 
reference only and shall not limit or otherwise affect the meaning hereof.

          SECTION 11. Separability. In case any one or more of the provisions
contained in this Agreement shall for any reason be held to be invalid, illegal
or unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provision of this Agreement, but this Agreement shall
be construed as if such invalid or illegal or unenforceable provision had never
been contained herein.

          SECTION 12. Termination. This Agreement shall terminate automatically
upon the termination of the Expense Agreement; provided, however, that this
Agreement shall continue to be effective or shall be reinstated, as the case may
be, if and to the extent the Expense Agreement continues to be effective or is
reinstated for any reason whatsoever. This Agreement is continuing, irrevocable,
unconditional and absolute.

                                      - 6 -


<PAGE>   7




          SECTION 13. Successors and Assigns. All guarantees and agreements of 
the Guarantor contained in this Agreement shall bind the successors, assigns,
receivers, trustees and representatives of the Guarantor and shall inure to the
benefit of the Beneficiaries. In the event that the Guarantor shall assign its
obligations contained in this Agreement, the Guarantor shall be discharged from
all obligations and covenants of the Guarantor under this Agreement to the
fullest extent permitted by law.

          SECTION 14. Amendment. So long as there remains any Beneficiary or any
Preferred Securities of any series are outstanding, this Agreement shall not be
modified or amended in any manner adverse to such Beneficiary or to the holders
of the Preferred Securities.

          SECTION 15. Notices. Any notice, request or other communication 
required or permitted to be given hereunder shall be given in writing by
delivering the same against receipt therefor by facsimile transmission
(confirmed by mail), telex or by registered or certified mail, addressed as
follows (and if so given, shall be deemed given when mailed or upon receipt of
an answer-back, if sent by telex):

                           MCI Capital I
                           c/o Wilmington Trust Company
                           1100 North Market Street
                           Wilmington, Delaware  19890
                           Facsimile No.:  (302) 651-8882
                           Attn:  Corporate Trust Department

                           MCI WORLDCOM, Inc.
                           515 East Amite St.
                           Jackson, MS 39201
                           Facsimile No.: 601-360-8110
                           Attn: Treasurer




                                      - 7 -



<PAGE>   8




          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to 
be duly executed as of the day and year first above written.


                               MCI WORLDCOM, INC.


                               By: /s/ SCOTT D. SULLIVAN
                                   -----------------------------------------
                                   Name:    Scott D. Sullivan
                                   Title:   Chief Financial Officer

                               MCI CAPITAL I


                               By: /s/ SCOTT D. SULLIVAN
                                   -----------------------------------------
                                   Name:    Scott D. Sullivan
                                   Title:   Administrative Trustee


                                      - 8 -



<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM MCI WORLDCOM
INC.'S FINANCIAL STATEMENTS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERNCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                             944
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                 8,660
<PP&E>                                          23,777
<DEPRECIATION>                                 (1,477)
<TOTAL-ASSETS>                                  82,278
<CURRENT-LIABILITIES>                           14,143
<BONDS>                                         16,032
                              750
                                          0
<COMMON>                                            18
<OTHER-SE>                                      44,246
<TOTAL-LIABILITY-AND-EQUITY>                    82,278
<SALES>                                              0
<TOTAL-REVENUES>                                 8,661
<CGS>                                            4,141
<TOTAL-COSTS>                                   10,869
<OTHER-EXPENSES>                                  (36)
<LOSS-PROVISION>                                   115
<INTEREST-EXPENSE>                                 351
<INCOME-PRETAX>                                (2,523)
<INCOME-TAX>                                       462
<INCOME-CONTINUING>                            (2,985)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                    129
<CHANGES>                                            0
<NET-INCOME>                                   (3,141)
<EPS-PRIMARY>                                   (2.77)
<EPS-DILUTED>                                   (2.77)
        

</TABLE>


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