MOTOROLA INC
424B1, 1999-02-01
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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<PAGE>

                                                Filed Pursuant to Rule 424(b)(1)
                                                      Registration No. 333-70827
 
PROSPECTUS
 
                        20,000,000 Preferred Securities
                           Motorola Capital Trust I
 
           6.68% Trust Originated Preferred SecuritiesSM ("TOPrSSM")
                (Liquidation Amount $25 per Preferred Security)
                    Fully and Unconditionally Guaranteed by
 
                             [MOTOROLA, INC. LOGO]
 
                               -----------------
 
      A brief description of the preferred securities can be found under
"Summary Information--Q&A" in this prospectus.
 
      We urge you to carefully read the "Risk Factors" section beginning on
page 11, where we describe specific risks associated with these preferred
securities, along with the rest of this prospectus before you make your
investment decision.
 
      The preferred securities have been approved for listing on the New York
Stock Exchange, subject to official notice of issuance, under the trading
symbol "MOT PrA." We expect that the preferred securities will begin trading
on the New York Stock Exchange within 30 days after they are first issued.
 
                               -----------------
 
<TABLE>
<CAPTION>
                                                     Per Preferred
                                                       Security       Total
                                                     -------------    -----
     <S>                                             <C>           <C>
     Public Offering Price (1)......................    $25.00     $500,000,000
     Underwriting Commission........................      (2)          (2)
     Proceeds to the Trust..........................    $25.00     $500,000,000
</TABLE>
    (1)Plus accrued distributions from February 3, 1999, if settlement
       occurs after that date.
    (2) Underwriting commissions of $.7875 per preferred security (or
        $15,750,000 for all preferred securities) will be paid by Motorola,
        Inc.
 
      Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is
a criminal offense.
 
      The preferred securities will be ready for delivery in book-entry form
only through The Depository Trust Company on or about February 3, 1999.
 
                               -----------------
 
Merrill Lynch & Co.
   A.G. Edwards & Sons, Inc.
            Goldman, Sachs & Co.
                  Morgan Stanley Dean Witter
                        PaineWebber Incorporated
                               Prudential Securities Incorporated
                                                           Salomon Smith Barney
 
                               -----------------
 
               The date of this prospectus is January 29, 1999.
 
SM"Trust Originated Preferred Securities" and "TOPrS" are service marks of
Merrill Lynch & Co., Inc.
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<S>                                                                        <C>
Where You Can Find More Information.......................................   3
Summary Information--Q&A..................................................   5
Risk Factors..............................................................  11
Motorola Capital Trust I..................................................  16
Motorola..................................................................  18
Recent Developments.......................................................  20
Use of Proceeds...........................................................  21
Ratios of Earnings to Fixed Charges.......................................  21
Capitalization............................................................  22
Selected Financial Data...................................................  23
Description of the Preferred Securities...................................  24
Description of the Subordinated Debentures................................  36
Description of the Trust Guarantee........................................  45
Effect of Obligations Under the Subordinated Debentures and the Trust
 Guarantee................................................................  48
United States Federal Income Taxation.....................................  50
Underwriting..............................................................  55
Legal Matters.............................................................  57
Experts...................................................................  57
Index of Defined Terms....................................................  58
</TABLE>
 
                               -----------------
 
        You should rely only on the information incorporated by reference or
set forth in this prospectus. Neither we nor the underwriters have authorized
anyone else to provide you with different information. We are only offering
these securities in states where the offer is permitted. You should not assume
that the information in this prospectus is accurate as of any date other than
the date on the front cover.
 
                                       2
<PAGE>
 
                      WHERE YOU CAN FIND MORE INFORMATION
 
      We file annual, quarterly and special reports, proxy statements and other
information with the Securities and Exchange Commission (the "SEC"). Our SEC
filings are available to the public over the Internet at the SEC's web site at
http://www.sec.gov. You may also read and copy any document we file with the
SEC at its public reference facilities at 450 Fifth Street, N.W., Washington,
D.C. 20549. You can also obtain copies of the documents at prescribed rates by
writing to the Public Reference Section of the SEC at 450 Fifth Street, N.W.,
Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further
information on the operation of the public reference facilities. Our SEC
filings are also available at the office of the New York Stock Exchange (the
"NYSE"). For further information on obtaining copies of our public filings at
the NYSE, you should call (212) 656-5060.
 
      We "incorporate by reference" into this prospectus the information we
file with the SEC, which means that we can disclose important information to
you by referring you to those documents. The information incorporated by
reference is an important part of this prospectus and information that we file
subsequently with the SEC will automatically update this prospectus. We
incorporate by reference the documents listed below and any filings we make
with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), after the initial filing
of the registration statement that contains this prospectus and prior to the
time that we sell all the securities offered by this prospectus:
 
     .  Motorola, Inc.'s Annual Report on Form 10-K for the fiscal year
        ended December 31, 1997 (the "Form 10-K").
 
     .  Motorola, Inc.'s Quarterly Reports on Form 10-Q for the quarters
        ended March 28, 1998, June 27, 1998 and September 26, 1998.
 
     .  Motorola, Inc.'s Current Reports on Form 8-K dated June 4, 1998
        and November 5, 1998.
 
      You may request a copy of these filings (other than exhibits, unless that
exhibit is specifically incorporated by reference into that filing) at no cost,
by writing to or telephoning us at the following address:
 
                               A. Peter Lawson
                               Secretary, Motorola, Inc.
                               1303 East Algonquin Road
                               Schaumburg, Illinois 60196
                               Telephone: (847) 576-5000
 
      There are no separate financial statements of Motorola Capital Trust I
(the "Trust") in this prospectus. We do not believe such financial statements
would be helpful because:
 
     .  The Trust is a direct wholly-owned subsidiary of Motorola, Inc.,
        which files consolidated financial information under the Exchange
        Act.
 
     .  The Trust does not have any independent operations other than
        issuing the Preferred Securities and Common Securities and
        purchasing the Subordinated Debentures (each as defined under
        "Summary Information--Q&A").
 
     .  The obligations of Motorola, Inc. under the Subordinated
        Debentures and the Trust Guarantee (as defined under "Summary
        Information--Q&A--What is the nature of Motorola's guarantee of
        the Preferred Securities?") have the effect of providing a full,
        irrevocable and unconditional guarantee of the Trust's obligations
        under the Preferred Securities. Holders of Preferred Securities
        may, under certain circumstances, enforce these obligations
        directly against Motorola, Inc. See "Description of the Trust
        Guarantee" and "Effect of Obligations Under the Subordinated
        Debentures and the Trust Guarantee."
 
                                       3
<PAGE>
 
      The Trust is not currently subject to the information reporting
requirements of the Exchange Act. The Trust will become subject to such
requirements upon the effectiveness of the registration statement that contains
this prospectus, although it intends to seek and expects to receive an
exemption therefrom. If the Trust did not receive such an exemption, the
expenses of operating the Trust would increase, as would the likelihood that
Motorola would exercise its option to liquidate the Trust early. See
"Description of the Preferred Securities--Distribution of the Subordinated
Debentures."
 
                                       4
<PAGE>
 
                           SUMMARY INFORMATION--Q & A
 
      This summary includes questions and answers that highlight selected
information from the prospectus to help you understand the Trust Originated
Preferred Securities (the "Preferred Securities"). This summary may not contain
all the information that may be important to you. You should carefully read the
prospectus to fully understand the terms of the Preferred Securities, as well
as the tax and other considerations that are important to you in making a
decision about whether to invest in the Preferred Securities. You should pay
special attention to the "Risk Factors" section to determine whether an
investment in the Preferred Securities is appropriate for you. You should also
read the documents described under "Where You Can Find More Information" to
learn more about Motorola's business, financial condition and results of
operations.
 
      As used in this prospectus, the term "Motorola" refers to Motorola, Inc.
and not to any of its consolidated subsidiaries, and the term the "Company"
refers to Motorola and its consolidated subsidiaries. Certain other terms used
in this summary are defined elsewhere in this prospectus. See "Index of Defined
Terms" for a cross reference to the location in this prospectus where such
terms are defined.
 
What are the Preferred Securities?
 
      Each Preferred Security represents a preferred undivided beneficial
interest in the assets of the Trust. The Trust will offer 20,000,000 Preferred
Securities to the public at a price of $25 per Preferred Security and will sell
its common securities (the "Common Securities" and, together with the Preferred
Securities, the "Trust Securities") to Motorola. The Trust will use the
proceeds from these sales to buy a series of 6.68% Deferrable Interest Junior
Subordinated Debentures due March 31, 2039 (the "Subordinated Debentures") from
Motorola with the same payment terms as the Preferred Securities.
 
Who is the Trust?
 
      The Trust is a Delaware statutory business trust recently created by
Motorola for the sole purpose of issuing the Trust Securities and investing the
proceeds in the Subordinated Debentures and engaging in incidental activities.
The Trust's principal executive offices are located at 1303 East Algonquin
Road, Schaumburg, Illinois 60196 and its telephone number at that address is
(847) 576-5000.
 
      There are four trustees of the Trust (the "Trustees"). Two of the
Trustees are officers of Motorola. Harris Trust and Savings Bank ("Harris")
will act as the property trustee of the Trust (the "Property Trustee") and
First Union Trust Company, National Association ("First Union"), will act as
the Delaware trustee of the Trust (the "Delaware Trustee"). Harris will also
act as trustee under the Indenture (as defined under "Description of the
Subordinated Debentures") governing the Subordinated Debentures (the "Indenture
Trustee").
 
Who is Motorola?
 
      Motorola is a global leader in advanced electronic systems and services.
It liberates the power of technology by creating software-enhanced products
that provide integrated customer solutions and Internet access via wireless and
satellite communications, as well as computing, networking and automotive
electronics. Motorola also provides essential digital building blocks in the
form of embedded semiconductors, controls and systems. The Company's net sales
in 1998 were $29.4 billion. Its principal executive offices are located at 1303
East Algonquin Road, Schaumburg, Illinois 60196 and its telephone number at
that address is (847) 576-5000.
 
                                       5
<PAGE>
 
 
What distributions will you receive?
 
      If you purchase the Preferred Securities, you will be entitled to receive
cumulative cash distributions at an annual rate of 6.68% of the liquidation
amount of $25 per Preferred Security. Distributions will accumulate from
February 3, 1999. Distributions will be paid quarterly in arrears on March 31,
June 30, September 30 and December 31 of each year, beginning on March 31,
1999, subject to deferral as described below. The initial cash distribution
payable on March 31, 1999, will equal $.2691 for each $25 Preferred Security.
Subsequent cash distributions will equal $.4175 for each $25 Preferred
Security.
 
Can distributions be deferred?
 
      So long as no event of default under the Subordinated Debentures has
occurred and is continuing, Motorola has the right, at one or more times, to
defer interest payments on the Subordinated Debentures for up to 20 consecutive
quarters, but not beyond the maturity date of the Subordinated Debentures.
 
      If, and to the extent that, Motorola defers interest payments on the
Subordinated Debentures, the Trust will also defer distributions on the
Preferred Securities. During any deferral period distributions will not be paid
on a current basis. However, you will still accumulate distributions at an
annual rate of 6.68% of the liquidation amount of $25 per Preferred Security,
plus you will accumulate additional distributions at the same rate, compounded
quarterly, on any unpaid distributions (to the extent permitted by law).
 
      During any period in which Motorola defers interest payments on the
Subordinated Debentures, Motorola will not be permitted to (with limited
exceptions described under "Description of the Subordinated Debentures--Option
to Extend Interest Payment Period"):
 
  .  declare or pay dividends or make other distributions on its capital
     stock;
 
  .  redeem, purchase or acquire, or make liquidation payments with respect
     to, its capital stock;
 
  .  pay interest, principal or premium on, or repay, repurchase or redeem,
     any of its debt securities that rank equal with or junior to the
     Subordinated Debentures; or
 
  .  make guarantee payments with respect to the foregoing.
 
      If Motorola defers payments of interest on the Subordinated Debentures,
the Preferred Securities will be treated as being issued with original issue
discount ("OID") for United States federal income tax purposes. This means you
will be required to recognize interest income with respect to distributions
(even if they are deferred) and include such amounts in your gross income for
United States federal income tax purposes before you receive any cash
distributions relating to such interest income. See "Risk Factors--Motorola's
Ability to Defer Interest Payments Has Tax Consequences For You and May Affect
the Trading Price of the Preferred Securities," "Description of the
Subordinated Debentures--Option to Extend Interest Payment Period" and "United
States Federal Income Taxation."
 
What will affect the distributions you receive?
 
      The ability of the Trust to pay distributions to you is entirely
dependent on its receipt of payments on the Subordinated Debentures from
Motorola.
 
What are the Subordinated Debentures?
 
      The Subordinated Debentures are long-term loans made by the Trust to
Motorola. Motorola's obligations under the Subordinated Debentures are
subordinated to its Senior Indebtedness (as defined
 
                                       6
<PAGE>
 
under "Description of the Subordinated Debentures--Subordination") and will be
effectively subordinated to all existing and future liabilities and obligations
of Motorola's subsidiaries. As of December 31, 1998, the aggregate amount of
Senior Indebtedness and liabilities and obligations of Motorola's subsidiaries
that would have effectively ranked senior to the Subordinated Debentures was
approximately $10.6 billion.
 
When do the Subordinated Debentures mature?
 
      The Subordinated Debentures mature on March 31, 2039, which date may be
extended at any time at the election of Motorola for one or more periods, but
in no event to a date later than the earlier of (i) March 31, 2048 or (ii) the
Interest Deduction Date (as defined under "Description of the Subordinated
Debentures--Option to Change Scheduled Maturity Date"), provided certain
conditions are met. The maturity date may be shortened to a date not earlier
than February 3, 2004 if Motorola chooses to liquidate the Trust and distribute
the Subordinated Debentures. See "Description of the Subordinated Debentures--
Option to Change Scheduled Maturity Date."
 
      The Preferred Securities may be redeemed, in whole or in part, if certain
tax events occur or if there is a change in the Investment Company Act of 1940
(the "1940 Act") that requires the Trust to register under the 1940 Act. See
"Description of the Preferred Securities--Special Event Redemption."
 
When can the Preferred Securities be redeemed?
 
      The Trust must redeem the Preferred Securities when the Subordinated
Debentures are paid at maturity or when and to the extent they are redeemed by
Motorola. Motorola has the option at any time on or after February 3, 2004 to
redeem the Subordinated Debentures, in whole or in part. In addition, Motorola
may redeem the Subordinated Debentures at any time at its option, in whole or
in part, if certain tax events occur or if there is a change in the 1940 Act
that requires the Trust to register under that law. Upon any redemption, you
will receive the liquidation amount of $25 per Preferred Security plus any
unpaid distributions to the date of redemption (the "Redemption Price"). See
"Description of the Preferred Securities--Special Event Redemption."
 
What is the nature of Motorola's guarantee of the Preferred Securities?
 
      Motorola's obligations relating to the Preferred Securities include:
 
  .  its obligations to make payments on the Subordinated Debentures;
 
  .  its obligations under the trust guarantee (the "Trust Guarantee"); and
 
  .  its obligations under the Declaration (as defined under "Motorola
     Capital Trust I").
 
Taken together, these obligations represent a full and unconditional guarantee
of amounts due under the Preferred Securities, subject only to the limitations
described in this prospectus. For a discussion of Motorola's obligations listed
above, see "Description of the Trust Guarantee" and "Effect of Obligations
Under the Subordinated Debentures and the Trust Guarantee."
 
      The Trust Guarantee will not apply to any payment of distributions on the
Preferred Securities except to the extent the Trust shall have funds available
therefor. If Motorola does not make interest or principal payments on the
Subordinated Debentures, the Trust will not pay distributions on the Preferred
Securities and will not have sufficient funds available to make such
distributions. As a result, you will not be able to rely upon the Trust
Guarantee for payment of these amounts. Instead, you or the Property Trustee
may enforce the rights of the Trust under the Subordinated Debentures directly
against Motorola. See "Risk Factors--Payments on the Preferred Securities Are
Entirely
 
                                       7
<PAGE>
 
Dependent on Motorola Making Payments on the Subordinated Debentures; The Trust
Guarantee Covers Payments Only if the Trust Has Cash Available."
 
      Motorola's obligations under the Subordinated Debentures and the Trust
Guarantee are subject to payment on its Senior Indebtedness, which includes
obligations under all outstanding series of its Liquid Yield Option(TM) Notes
("LYONs(TM)"), and will be effectively subordinated to all existing and future
liabilities and obligations of Motorola's subsidiaries. As of December 31,
1998, the aggregate amount of Senior Indebtedness and liabilities and
obligations of Motorola's subsidiaries that would have effectively ranked
senior to the Subordinated Debentures was approximately $10.6 billion.
 
When can the Trust be liquidated?
 
      Motorola will have the right at any time to liquidate the Trust and cause
the Subordinated Debentures to be distributed to the holders of the Trust
Securities in liquidation of the Trust.
 
What happens if the Trust is liquidated and the Subordinated Debentures are
distributed?
 
      If Motorola elects to liquidate the Trust and thereby causes the
Subordinated Debentures to be distributed to holders of the Trust Securities in
liquidation of the Trust, Motorola shall have the right to shorten the maturity
of such Subordinated Debentures to a date not earlier than February 3, 2004. In
addition, Motorola would retain the right to extend the maturity of such
Subordinated Debentures to a date not later than the earlier of (i) March 31,
2048 or (ii) the Interest Deduction Date, provided, that it can extend the
maturity only if certain conditions are met on the date Motorola exercises such
right and on the Maturity Date (as defined under "Description of the
Subordinated Debentures--Option to Change Scheduled Maturity Date") in effect
prior to such proposed extension.
 
      If the Subordinated Debentures are distributed, Motorola will use its
best efforts to list them on the NYSE, or such other exchange on which the
Preferred Securities are then listed.
 
What happens if the Trust is liquidated and the Subordinated Debentures are not
distributed?
 
      In the event of the involuntary or voluntary liquidation, dissolution,
winding up or termination of the Trust, the holders of the Preferred Securities
will be entitled to receive, for each Preferred Security, a liquidation amount
of $25 plus accrued and unpaid distributions thereon (including interest
thereon) to the date of payment (the "Liquidation Distribution"), unless, in
connection with such liquidation, dissolution, winding up or termination, the
Subordinated Debentures are distributed to the holders of the Preferred
Securities.
 
What is an event of default and what are the consequences?
 
      The following are events of default under both the Indenture and the
Declaration:
 
  .  Motorola's failure to pay principal of (or premium, if any) on the
     Subordinated Debentures when due;
 
  .  Motorola's failure to pay any installment of interest on the
     Subordinated Debentures when due (other than pursuant to its deferral
     rights), which continues for 30 days;
 
  .  Motorola's failure to perform any other covenant in the Indenture which
     continues for 60 days after notice; and
 
  .  certain bankruptcy, insolvency or reorganization events.
 
                                       8
<PAGE>
 
 
      If any of these events of default occurs and is continuing, either the
Indenture Trustee or the holders of at least 25% of the principal amount of the
Subordinated Debentures may declare the principal of and interest on the
Subordinated Debentures to be due and payable immediately, unless the event of
default is the result of certain bankruptcy, insolvency or reorganization
events, in which case the principal amount of and interest on the Subordinated
Debentures will automatically become due and payable immediately. Since the
Trust initially will hold all of the Subordinated Debentures, upon an event of
default, the Property Trustee will have the authority to declare the principal
of and interest on the Subordinated Debentures due and payable.
 
      If the Property Trustee fails to enforce its rights, any holder of the
Preferred Securities may proceed directly against Motorola to enforce the
Property Trustee's rights. In addition, if the event of default arises due to
the failure of Motorola to pay principal or interest on the Subordinated
Debentures, any holder of Preferred Securities may proceed directly against
Motorola to collect its pro rata share of unpaid principal and interest.
Holders of Preferred Securities have similar rights in the event of a default
by Motorola under the Trust Guarantee.
 
      The holders of a majority of the principal amount of the Subordinated
Debentures may, under certain circumstances, rescind and annul any acceleration
as a result of an event of default. See "Description of the Preferred
Securities--Declaration Events of Default" and "--Voting Rights" and
"Description of the Subordinated Debentures--Indenture Events of Default."
 
      If an event of default has occurred under the Declaration or if Motorola
has defaulted on its obligations under the Trust Guarantee, Motorola will not
be permitted to (with limited exceptions described under "Description of the
Trust Guarantee--Certain Covenants of Motorola"):
 
  .  declare or pay dividends or make other distributions on its capital
     stock;
 
  .  redeem, purchase or acquire, or make liquidation payments with respect
     to, its capital stock;
 
  .  pay interest, principal or premium on, or repay, repurchase or redeem,
     any of its debt securities that rank equal with or junior to the
     Subordinated Debentures; or
 
  .  make guarantee payments with respect to the foregoing.
 
Will you have voting rights?
 
      Generally, holders of the Preferred Securities will not have any voting
rights, except under the limited circumstances described under "Description of
the Preferred Securities--Voting Rights." The holders of a majority in
liquidation amount of the Preferred Securities, however, have the right to
direct the time, method and place of conducting any proceeding for any remedy
available to the Property Trustee, or direct the exercise of any trust or power
conferred upon the Property Trustee.
 
Will you receive a certificate representing the Preferred Securities?
 
      No. The Preferred Securities will be represented by a global security
that will be deposited with and registered in the name of The Depository Trust
Company, New York, New York ("DTC") or its nominee. This means that you will
not receive a certificate for the Preferred Securities.
 
Where will the Preferred Securities be listed?
 
      The Preferred Securities have been approved for listing on the NYSE,
subject to official notice of issuance, under the trading symbol "MOT PrA." We
expect that the Preferred Securities will begin trading on the NYSE within 30
days after they are first issued.
 
                                       9
<PAGE>
 
 
How will the proceeds be used?
 
      All of the proceeds of the sale of the Preferred Securities, together
with the proceeds of the sale of the Common Securities to Motorola, will be
invested by the Trust in the Subordinated Debentures. Motorola will, in turn,
use the proceeds from the sale of the Subordinated Debentures to repay short-
term indebtedness and for general corporate purposes.
 
                                       10
<PAGE>
 
                                  RISK FACTORS
 
      Your investment in the Preferred Securities will involve certain risks.
You should carefully read the following risk factors and the other sections of
this prospectus, and the documents incorporated by reference herein, before
purchasing any Preferred Securities. You should also consider risks relating to
Motorola's business, as described in our 1998 Proxy Statement on pages F-8 and
F-9, in our other SEC filings and elsewhere in this prospectus.
 
Motorola's Obligations under the Trust Guarantee and the Subordinated
Debentures are Subordinated
 
      Motorola's obligations under the Trust Guarantee are unsecured and will
rank in priority of payment:
 
  .  junior to all of Motorola's other liabilities, except those liabilities
     made equal with or subordinate to such obligations by their terms;
 
  .  equal with Motorola's most senior preferred and preference stock now or
     hereafter issued and equal with Motorola's obligations under other
     similar trust guarantees; and
 
  .  senior to Motorola's common stock.
 
      This means that Motorola cannot make any payments on the Trust Guarantee
if it defaults on a payment of any of its other liabilities, except those
liabilities made equal with or subordinate to the Trust Guarantee by their
terms. In the event of the bankruptcy, liquidation or dissolution of Motorola,
its assets would be available to pay obligations under the Trust Guarantee only
after all payments had been made on its other liabilities, except those
liabilities made equal with or subordinate to the Trust Guarantee by their
terms.
 
      Motorola's obligations under the Subordinated Debentures are unsecured
and will rank junior in priority of payment to Motorola's Senior Indebtedness
(whether now existing or hereafter incurred) and effectively will rank junior
to all existing and future liabilities and obligations of Motorola's
subsidiaries. This means that Motorola cannot make any payments of principal
(including redemption payments) or interest on the Subordinated Debentures if
it defaults on a payment on its Senior Indebtedness. In the event of the
bankruptcy, liquidation or dissolution of Motorola, its assets would be
available to pay obligations under the Subordinated Debentures only after all
payments had been made on its Senior Indebtedness. At December 31, 1998, the
aggregate amount of Senior Indebtedness and liabilities and obligations of
Motorola's subsidiaries that would have effectively ranked senior to the
Subordinated Debentures was approximately $10.6 billion.
 
      The Preferred Securities, the Subordinated Debentures and the Trust
Guarantee do not limit the ability of Motorola or any of its subsidiaries to
incur additional indebtedness, including indebtedness that ranks senior to the
Subordinated Debentures and the Trust Guarantee. For more information please
refer to "Description of the Trust Guarantee--Status of the Trust Guarantee"
and "Description of the Subordinated Debentures--Subordination."
 
      The Subordinated Debentures and the Trust Guarantee will be obligations
exclusively of Motorola. Since the operations of Motorola are partially
conducted through subsidiaries, its cash flow and consequent ability to service
debt, including the Subordinated Debentures, and to satisfy its other
obligations, including those under the Trust Guarantee, are partially dependent
upon the earnings of its subsidiaries. The subsidiaries are separate and
distinct legal entities and have no obligation, contingent or otherwise, to pay
any amounts due pursuant to the Subordinated Debentures or the Trust Guarantee
or to make funds available therefor, whether by dividends, loans or other
payments. In addition, the payment of dividends and the making of loans and
advances to Motorola by its subsidiaries may be subject to statutory or
contractual restrictions, are contingent upon the earnings of those
subsidiaries and are subject to various business considerations.
 
                                       11
<PAGE>
 
      Any right of Motorola to receive assets of any of its subsidiaries upon
their liquidation or reorganization (and the right of the holder(s) of the
Subordinated Debentures or a party seeking to enforce the Trust Guarantee to
participate in those assets) will be effectively subordinated to the claims of
that subsidiary's creditors (including trade creditors), except to the extent
that Motorola is itself recognized as a creditor of such subsidiary, in which
case the claims of Motorola would be subordinate to any security interests in
the assets of such subsidiary and any indebtedness of such subsidiary senior to
that held by Motorola. As of December 31, 1998, Motorola's subsidiaries had
outstanding approximately $4.0 billion of liabilities.
 
Payments on the Preferred Securities Are Entirely Dependent on Motorola Making
Payments on the Subordinated Debentures; The Trust Guarantee Covers Payments
Only if the Trust Has Cash Available
 
      The ability of the Trust to timely pay distributions on the Preferred
Securities and the Liquidation Distribution is entirely dependent upon
Motorola's making the related payments on the Subordinated Debentures when due.
 
      If Motorola defaults on its obligation to pay principal of or interest on
the Subordinated Debentures, the Trust will not have sufficient funds to pay
distributions or the $25 per Preferred Security Liquidation Distribution. In
those circumstances, you will not be able to rely upon the Trust Guarantee for
payment of these amounts. Instead, you may directly sue Motorola or seek other
remedies to collect your pro rata share of payments owed or rely on the
Property Trustee to enforce the Trust's rights under the Subordinated
Debentures.
 
      For more information, please refer to "Description of the Subordinated
Debentures--Subordination" and "Description of the Trust Guarantee--Status of
the Trust Guarantee."
 
There Are Limitations Regarding the Enforcement of Certain Rights by Holders of
the Preferred Securities
 
      If an event of default under the Subordinated Debentures occurs and is
continuing, such event would also be an event of default under the Preferred
Securities. In that case, the holders of the Preferred Securities would rely on
the enforcement by the Property Trustee of its rights as holder of the
Subordinated Debentures against Motorola. The holders of a majority in
liquidation amount of the Preferred Securities will have the right to direct
the Property Trustee to exercise its remedies, and if the Property Trustee does
not enforce its rights to the fullest extent permitted by law, any holder of
Preferred Securities may take action directly against Motorola to enforce the
Property Trustee's rights. If an event of default under the Preferred
Securities occurs that is attributable to Motorola's failure to pay interest or
principal on the Subordinated Debentures, any holder of the Preferred
Securities may proceed directly against Motorola to collect its pro rata share
of unpaid principal and interest. The holders of Preferred Securities will not
be able to exercise directly any other remedies available to the holders of the
Subordinated Debentures unless the Property Trustee fails to do so. See
"Description of the Preferred Securities--Declaration Events of Default" and
"Description of the Subordinated Debentures--Indenture Events of Default."
 
Motorola's Ability to Defer Interest Payments Has Tax Consequences for You and
May Affect the Trading Price of the Preferred Securities
 
      So long as no event of default under the Subordinated Debentures has
occurred and is continuing, Motorola has the right, at one or more times, to
defer interest payments on the Subordinated Debentures for up to 20 consecutive
quarters, but not beyond the maturity date of the Subordinated Debentures.
 
      If Motorola defers interest payments on the Subordinated Debentures, the
Trust will also defer distributions on the Preferred Securities. During this
deferral period, you will still accumulate
 
                                       12
<PAGE>
 
distributions at an annual rate of 6.68% of the liquidation amount of $25 per
Preferred Security, plus you will accumulate additional distributions at the
same rate, compounded quarterly, on any unpaid distributions (to the extent
permitted by law).
 
      During a deferral period, you will be required to accrue interest income
(in the form of OID) for United States federal income tax purposes in respect
of your pro-rata share of the Subordinated Debentures. As a result, you must
include the accrued interest in your gross income for United States federal
income tax purposes prior to your receiving cash. You will not receive the cash
distribution related to any accrued and unpaid interest from the Trust if you
sell the Preferred Securities before the end of any deferral period.
 
      During a deferral period, accrued but unpaid distributions will increase
your tax basis in the Preferred Securities. If you sell the Preferred
Securities during a deferral period, your increased tax basis will decrease the
amount of any capital gain or increase the amount of any capital loss that you
may have otherwise realized on the sale. A capital loss, except in certain
limited circumstances, cannot be applied to offset ordinary income.
 
      Motorola has no current intention of exercising its right to defer
interest payments on the Subordinated Debentures. However, if Motorola
exercises this right in the future, the market price of the Preferred
Securities may not fully reflect the value of accrued but unpaid interest on
the Subordinated Debentures. If you sell the Preferred Securities during an
interest deferral period, you may receive a lower return on your investment
than someone who continued to hold the Preferred Securities.
 
      See "United States Federal Income Taxation" for more information
regarding the tax consequences of purchasing the Preferred Securities.
 
Preferred Securities May Be Redeemed Before February 3, 2004 if a Special Event
Occurs
 
      The occurrence of (i) certain adverse tax consequences to the Trust or
Motorola or (ii) the Trust being considered an "investment company" under the
1940 Act would constitute a "Special Event." At any time a Special Event occurs
and is continuing, Motorola has the right to redeem the Subordinated
Debentures, in whole or in part. The redemption of the Subordinated Debentures
will cause a mandatory redemption of an equivalent amount of the Trust
Securities on a pro rata basis within 90 days of the event at an amount equal
to the Redemption Price of the Trust Securities. See "Description of the
Preferred Securities--Special Event Redemption" for more information.
 
Preferred Securities May Be Redeemed After February 3, 2004 At Motorola's
Option
 
      At the option of Motorola, the Subordinated Debentures may be redeemed,
in whole or in part, at any time on or after February 3, 2004, at an amount
equal to the Redemption Price. See "Description of the Subordinated
Debentures--Optional Redemption." You should assume that Motorola will exercise
its redemption option if Motorola is able to refinance its obligations at a
lower interest rate or it is otherwise beneficial to Motorola to redeem the
Subordinated Debentures. If the Subordinated Debentures are redeemed, the Trust
must redeem Trust Securities having an aggregate liquidation amount equal to
the aggregate principal amount of Subordinated Debentures so redeemed. See
"Description of the Preferred Securities--Mandatory Redemption."
 
The Maturity Date of the Preferred Securities Could Be Extended
 
      Motorola also has the option to extend the maturity date of the
Subordinated Debentures for one or more periods, but in no event to a date
later than the earlier of (i) March 31, 2048 and (ii) the Interest Deduction
Date, provided certain conditions are met. See "Description of the Subordinated
Debentures--Option to Change Scheduled Maturity Date." You should assume that
Motorola will exercise its option to extend the term of the Subordinated
Debentures if Motorola is unable to refinance its obligations at a
 
                                       13
<PAGE>
 
lower interest rate or it is otherwise beneficial to Motorola to extend the
maturity of the Subordinated Debentures. The Preferred Securities will not be
redeemed until the Subordinated Debentures have been repaid or redeemed. See
"Description of the Preferred Securities--Mandatory Redemption."
 
Distribution of the Subordinated Debentures May Have An Adverse Effect on
Market Price and May Have Tax Consequences for You
 
      The Trust may be terminated at any time before its expiration on January
19, 2054, at Motorola's option. As a result, and subject to the terms of the
Declaration, the Trustees may distribute the Subordinated Debentures to the
holders of the Trust Securities. Although Motorola has agreed to use its best
efforts to list the Subordinated Debentures on the NYSE, or such other exchange
on which the Preferred Securities are then listed, if this occurs, there can be
no assurance that the Subordinated Debentures will be approved for listing or
that a liquid trading market will develop for the Subordinated Debentures.
 
      If the Trustees distribute the Subordinated Debentures after the
dissolution of the Trust, Motorola may shorten the maturity of the Subordinated
Debentures to a date not earlier than February 3, 2004. In addition, Motorola
would retain the right to extend the maturity of such Subordinated Debentures
to any date up to the earlier of (i) March 31, 2048 and (ii) the Interest
Deduction Date, provided, that it can only extend the maturity if certain
conditions are met. See "Description of the Subordinated Debentures--Option to
Change Scheduled Maturity Date."
 
      Under current United States federal income tax laws, a distribution of
the Subordinated Debentures to you upon the dissolution of the Trust would not
be a taxable event to you. Nevertheless, if the Trust is classified for United
States federal income tax purposes as an association taxable as a corporation
at the time it is dissolved, the distribution of the Subordinated Debentures
would be a taxable event to you. In addition, if there is a change in law, a
distribution of the Subordinated Debentures upon the dissolution of the Trust
could be a taxable event to you. See "United States Federal Income Taxation--
U.S. Holders--Receipt of Subordinated Debentures or Cash Upon Liquidation of
the Trust" where we discuss applicable United States federal income tax
consequences.
 
      Motorola cannot predict the market prices for the Subordinated Debentures
that may be distributed. Accordingly, the Subordinated Debentures that you
receive upon a distribution or the Preferred Securities you hold pending such a
distribution may trade at a discount to the price that you paid to purchase the
Preferred Securities. Because you may receive Subordinated Debentures, you must
make an investment decision with regard to the Subordinated Debentures in
addition to the Preferred Securities. You should carefully review all the
information regarding the Subordinated Debentures contained in this prospectus.
 
      Motorola has no current intention of causing the termination of the Trust
and the distribution of the Subordinated Debentures. However, there are no
restrictions on its ability to do so at any time. Motorola anticipates that it
would consider exercising this right in the event that expenses associated with
maintaining the Trust were substantially greater than currently expected, such
as if a Special Event occurred or if the Trust did not, as expected, receive an
exemption from the information reporting requirements of the Exchange Act, or
if the accounting treatment currently given to securities such as the Preferred
Securities and the Subordinated Debentures were changed such that such
securities were treated as liabilities for financial reporting purposes. See
"Motorola Capital Trust I--Accounting Treatment." Motorola cannot predict other
circumstances under which this right would be exercised.
 
Limited Voting Rights
 
      Holders of Preferred Securities will have limited voting rights primarily
in connection with directing the activities of the Property Trustee as the
holder of the Subordinated Debentures and will not be entitled to vote to
appoint, remove or replace, or to increase or decrease the number of Trustees,
which
 
                                       14
<PAGE>
 
voting rights are vested exclusively in the holder of the Common Securities.
See "Description of the Preferred Securities--Voting Rights."
 
Potential Tax Law Changes
 
      From time to time, certain tax law changes have been proposed that would
deny interest deductions to corporate issuers of debt instruments with terms
that include certain of the terms of the Subordinated Debentures. In addition,
the Internal Revenue Service ("IRS") has challenged taxpayers' treatment as
indebtedness of securities issued with characteristics similar to the
Subordinated Debentures. To date, such tax law change proposals have not been
enacted and the only known challenge that has advanced as far as litigation was
settled short of trial, with a resolution favorable to the taxpayer's position.
However, if any similar tax law change were enacted or any such challenge by
the IRS were upheld, such event could give rise to a Tax Event (as defined
under "Description of the Preferred Securities--Special Event Redemption")
which could result in an early redemption of the Preferred Securities. See
"Description of the Preferred Securities--Special Event Redemption."
 
Absence of Prior Public Market
 
      Prior to this offering, there has been no public market for the Preferred
Securities. Although the Preferred Securities have been approved for listing on
the NYSE, subject to official notice of issuance, there can be no assurance
that an active trading market will develop. Furthermore, even if such a market
develops, there can be no assurance that the market price will equal or exceed
the public offering price set forth on the cover page of this prospectus. The
price at which the Preferred Securities may trade may not fully reflect the
value of any accumulated but unpaid distributions on the Preferred Securities.
In addition, in the event that Motorola exercised its right to defer payment on
the Subordinated Debentures, the market price of the Preferred Securities may
be adversely affected.
 
                                       15
<PAGE>
 
                            MOTOROLA CAPITAL TRUST I
 
General
 
      The Trust is a statutory business trust formed under Delaware law
pursuant to (i) a declaration of trust to be amended and restated on the
closing date of this offering (as so amended and restated, the "Declaration"),
executed by Motorola, as sponsor (the "Sponsor"), and the Trustees of the Trust
and (ii) a certificate of trust, as filed with the Secretary of State of the
State of Delaware on January 19, 1999. The Declaration will be qualified as an
indenture under the Trust Indenture Act of 1939, as amended (the "Trust
Indenture Act"). Upon issuance of the Preferred Securities, the purchasers
thereof will own all of the Preferred Securities. See "Description of the
Preferred Securities--Book-Entry Issuance--The Depository Trust Company."
Motorola will directly or indirectly acquire all of the issued and outstanding
Common Securities, which will be in an aggregate liquidation amount equal to at
least 3% of the total capital of the Trust. The Trust exists for the exclusive
purposes of (i) issuing the Trust Securities representing undivided beneficial
interests in the assets of the Trust, (ii) investing the gross proceeds of the
Trust Securities in the Subordinated Debentures and (iii) engaging in only
those other activities necessary, appropriate, convenient or incidental
thereto. The Trust has a term of approximately 55 years, but may be terminated
earlier as provided in the Declaration.
 
      Pursuant to the Declaration, the number of Trustees initially is four.
Two of the Trustees (the "Regular Trustees") will be persons who are officers
of Motorola. The third Trustee will be a financial institution unaffiliated
with Motorola that will serve as Property Trustee under the Declaration and as
indenture trustee for the purposes of the Trust Indenture Act. The fourth
Trustee will be a legal entity which maintains its principal place of business
in the State of Delaware and meets the requirements of applicable law. Harris
will act as the Property Trustee and First Union will act as the Delaware
Trustee, in each case until removed or replaced by the holder of the Common
Securities. For purposes of compliance with the provisions of the Trust
Indenture Act, Harris will also act as trustee under the Trust Guarantee (in
such capacity, the "Guarantee Trustee") and as Indenture Trustee. See
"Description of the Trust Guarantee."
 
      The Trust's business and affairs will be conducted by the Trustees. The
Property Trustee will hold title to the Subordinated Debentures for the benefit
of the Trust and the holders of the Trust Securities and, so long as the
Subordinated Debentures are held by the Trust, the Property Trustee will have
the power to exercise all rights, powers and privileges of a holder of
Subordinated Debentures under the Indenture. In addition, the Property Trustee
will maintain exclusive control of a segregated non-interest bearing bank
account (the "Property Trustee Account") to hold all payments made in respect
of the Subordinated Debentures for the benefit of the holders of the Trust
Securities. The Property Trustee will make payments of distributions and
payments on liquidation, redemption and otherwise to the holders of the Trust
Securities out of funds from the Property Trustee Account. The Guarantee
Trustee will hold the Trust Guarantee for the benefit of the holders of the
Preferred Securities. Motorola, as the direct or indirect holder of all the
Common Securities, will have the right to appoint, remove or replace any
Trustee (subject to the limitations set forth in the Declaration) and to
increase or decrease the number of Trustees, provided that the number of
Trustees shall be at least three. Motorola will pay all fees, expenses, debts
and obligations (other than with respect to the Trust Securities) related to
the Trust and the offering of the Trust Securities.
 
      The rights of the holders of the Preferred Securities, including economic
rights, rights to information and voting rights, are set forth in the
Declaration, the Delaware Business Trust Act, as amended (the "Trust Act"), the
Indenture and the Trust Indenture Act. See "Description of the Preferred
Securities."
 
                                       16
<PAGE>
 
Accounting Treatment
 
      The financial statements of the Trust will be reflected in Motorola's
consolidated financial statements, with the Preferred Securities shown as
"company-obligated mandatorily redeemable preferred securities of subsidiary
trust holding solely company-guaranteed debentures" in the same caption as
minority interest in consolidated subsidiaries. A footnote to Motorola's
audited financial statements will include a statement that the Trust is wholly-
owned by Motorola and that the sole asset of the Trust is the Subordinated
Debentures (indicating the principal amount, interest rate and maturity date
thereof). See "Capitalization."
 
                                       17
<PAGE>
 
                                    MOTOROLA
 
      Motorola is a corporation organized under the laws of the State of
Delaware as the successor to an Illinois corporation organized in 1928.
Motorola is a global leader in advanced electronic systems and services. It
liberates the power of technology by creating software-enhanced products that
provide integrated customer solutions and Internet access via wireless and
satellite communications, as well as computing, networking and automotive
electronics. Motorola also provides essential digital building blocks in the
form of embedded semiconductors, controls and systems. The Company's net sales
in 1998 were $29.4 billion."Motorola" is a registered trademark.
 
Cellular Products
 
      The Cellular Subscriber Sector ("CSS") primarily designs, manufactures,
distributes, markets and services subscriber radio-telephone equipment for
cellular and personal communications networks. In addition, CSS resells
cellular line service in the United States. CSS's products include mobile,
personal and wearable cellular telephones and related accessories.
 
      The Cellular Infrastructure Group ("CIG") primarily designs,
manufactures, distributes, installs, markets and services wireless
infrastructure equipment. CIG's products include electronic exchanges (i.e.,
telephone switches), base site controllers and radio base stations for Code
Division Multiple Access (CDMA), Personal Communication Systems (PCS), Personal
Digital Cellular (PDC), Global System for Mobile Communications (GSM), wireless
local loop (WILL(R)) and analog technologies.
 
      The Company also is a joint venture partner in cellular operating systems
in a number of international jurisdictions and is an investor in IRIDIUM(R)
gateway companies.
 
Semiconductor Products
 
      The Semiconductor Products Sector ("SPS") offers multiple DigitalDNA(TM)
solutions which enable its customers in the consumer, networking and computing,
transportation and wireless communications markets to create new business
opportunities.
 
      Semiconductors control and amplify electrical signals and are used in a
broad range of electronic products, including consumer electronic products,
computers, communications equipment, solid-state ignition systems and other
automotive electronic products, major home appliances, industrial controls,
robotics, aircraft, space vehicles, calculators and automatic controls.
 
Land Mobile Products
 
      The Land Mobile Products Sector ("LMPS") designs, manufactures and sells
analog and digital two-way voice and data products and systems for a variety of
worldwide applications. As a principal supplier of mobile and portable FM two-
way radio products and systems, LMPS provides equipment and systems to meet the
communication needs of individuals and many different types of business,
institutional and governmental organizations. LMPS products provide voice and
data communications between vehicles, persons and base stations. Also, LMPS
provides network services for two-way radio subscribers in international
markets through joint ventures.
 
      The principal customers for two-way radio products and systems include
public safety agencies, such as police, fire, highway maintenance departments
and forestry services; petroleum companies; gas, electric and water utilities;
telephone companies; diverse industrial companies; mining companies;
transportation companies such as railroads, airlines, taxicab operations and
trucking firms; institutions, such as schools and hospitals; and companies in
the construction, vending machine and service businesses. Also, there is an
emerging consumer two-way radio market using the products for personal and
family communications needs.
 
                                       18
<PAGE>
 
Messaging, Information and Media Products
 
      The Messaging, Information and Media Sector ("MIMS") manufactures,
distributes and sells paging subscriber, paging infrastructure and related
products, such as paging software and accessories. MIMS also provides network
services for paging and wireless data. It also manufactures and sells modems,
analog and digital transmission devices and other data communication devices.
In addition, MIMS manufactures equipment that enables voice, video and high-
speed data communications over cable networks. It offers handwriting and speech
recognition software for various applications and provides equipment and
systems to meet the communication needs of many different types of business,
institutional and governmental organizations.
 
Other Products
 
Integrated Electronic Systems Sector
 
      The Integrated Electronic Systems Sector (formerly the Automotive,
Component, Computer and Energy Sector) ("IESS") manufactures and sells products
in four major categories: automotive and industrial electronics; energy storage
products and systems; ceramic and quartz electronic components and electronic
fluorescent ballasts; and multi-function embedded board and computer system
products. IESS includes the Motorola Computer Group, which develops,
manufactures, sells and services multi-function computer systems and board
level products, together with operating systems and system enablers based on
the Motorola 68000, 88000, PowerPC(TM) series microprocessors and Intel
Pentium(TM) microprocessors. In addition, IESS now contains the Telematics
Communications Group, which focuses resources on creating products designed to
provide security, information, convenience and entertainment from a central
service center to drivers and their passengers. IESS has also established a
Flat Panel Display Division to develop the next generation of flat panel
displays and is involved in several joint ventures.
 
Space and Systems Technology Group
 
      The Space and Systems Technology Group ("SSTG") is engaged in the design,
development and production of advanced electronic communication systems and
products for a host of international and domestic commercial and government
users. SSTG's government business operations primarily perform research,
development and production work under contracts with governmental agencies, but
also conduct independent research and development programs. The satellite
communications business, Satellite Communications Group ("SCG"), designs,
builds and markets space-based telecommunications systems. Currently, SCG is
fulfilling the terms of contracts with Iridium LLC, an entity of which Motorola
owns approximately 19%, to build, deploy, operate and maintain a satellite
communications network, known as the IRIDIUM(R) system, as well as undertaking
research and development on other communications systems. The IRIDIUM system is
designed to provide global digital service to handheld telephones and related
equipment.
 
                                       19
<PAGE>
 
                              RECENT DEVELOPMENTS
 
Recent Earnings
 
      On January 13, 1999, Motorola reported unaudited financial results for
the fiscal quarter and year ended on December 31, 1998.
 
  .  Motorola reported sales of $8.34 billion in the fourth quarter of 1998,
     up 1 percent from $8.28 billion a year earlier.
 
  .  Net earnings were $159 million in the fourth quarter of 1998, or 26
     cents per share, compared with net earnings of $321 million, or 53 cents
     per share, in the fourth quarter of 1997. The year-earlier quarter
     included special charges against pre-tax earnings of $110 million, or 12
     cents per share after-tax, largely from decisions to exit several
     unprofitable businesses that no longer had strategic value to the
     Company. Excluding special charges, fourth-quarter 1997 earnings would
     have been $393 million, or 65 cents per share after-tax. There were no
     special charges in the fourth quarter of 1998.
 
  .  For the full year 1998, sales decreased 1 percent to $29.4 billion from
     $29.8 billion in 1997.
 
  .  The full-year loss for 1998, including special charges, was $1.0
     billion, or $1.61 per share after-tax, compared with earnings of $1.2
     billion, or $1.94 per share after-tax, in 1997. 1998's loss includes
     special charges of $1.9 billion pre-tax, or $2.19 per share after-tax,
     as a result of the Company's manufacturing consolidation, cost reduction
     and restructuring programs. The year-earlier period also includes
     special charges against pre-tax earnings of $306 million, or 32 cents
     per share after-tax. Excluding special charges, earnings for all of 1998
     were $347 million, or 58 cents per share after-tax, compared with $1.4
     billion, or $2.26 per share after-tax in 1997.
 
Restructuring Program
 
      Last June, Motorola announced a restructuring program to improve its
long-term profitability and efficiency. In connection with that program, in the
second quarter of 1998 the Company recorded a pre-tax restructuring charge of
$1.98 billion. Steps included in the restructuring program are: (i) reductions
in worldwide employment, (ii) consolidation of manufacturing operations, (iii)
exiting non-strategic and poorly performing businesses and (iv) the writedown
of assets that have become impaired.
 
      Last July, Motorola announced the realignment of its communications-
related businesses into one organization called the Motorola Communications
Enterprise. The new structure links together all of the Company's
communications-related businesses so that they can easily share resources and
cooperate on key business and technology issues. Business segments in the
Motorola Communications Enterprise include cellular, space, land mobile, and
messaging, information and media, which together accounted for about three-
fourths of the Company's $29.4 billion in sales in 1998.
 
      During 1998, IESS sold its printed circuit board business located in
Singapore and signed definitive agreements to sell its component products
business. The sale of the component products business is expected to be
completed in the first quarter of 1999, although there can be no assurance that
the pending transaction will be completed.
 
      SPS closed four major semiconductor facilities in North Carolina,
California, Arizona and the Philippines and exited four different semiconductor
business segments during 1998. MIMS closed a major paging facility in Puerto
Rico and IESS closed a quartz and ceramics-based components manufacturing
facility in Costa Rica.
 
      Motorola also continues to evaluate several strategic options with
respect to its semiconductor components business and its cellular
infrastructure business. No decision has been made and no assurances can be
made that any action will be taken with respect to these businesses.
 
 
                                       20
<PAGE>
 
      At the end of the fourth quarter, the Company had reduced its employee
headcount by approximately 17,000 people and, assuming the pending sale of
IESS's component products business is completed during the first quarter, there
will be a resulting additional reduction in the Company's employee population
of approximately 4,500 people.
 
Iridium Financing
 
      In December, Iridium LLC announced that it received significant new
financing to replace existing credit lines. Motorola has increased its
guarantee of such bank financing by $475 million to a total of $750 million,
the majority of which matures on December 31, 2000 and the remainder of which
matures on December 31, 2001. Motorola has also agreed to extend the
availability date for Iridium LLC to draw on its existing standby guarantee of
$350 million of bank financing to October 1, 1999. The Company is also
providing $400 million of additional financial support to Iridium LLC.
 
                                USE OF PROCEEDS
 
      All of the proceeds of the sale of the Trust Securities will be invested
by the Trust in the Subordinated Debentures. Motorola will, in turn, use the
proceeds from the sale of the Subordinated Debentures to repay short-term
indebtedness and for general corporate purposes. On January 28, 1999, Motorola
had outstanding approximately $2.553 billion of commercial paper, with a
weighted average maturity of approximately 77 days and bearing a weighted
average interest rate of approximately 4.99% per annum.
 
                      RATIOS OF EARNINGS TO FIXED CHARGES
 
      The following are the unaudited consolidated ratios of earnings to fixed
charges for each of the years in the five-year period ended December 31, 1998:
 
<TABLE>
<CAPTION>
                               Year Ended December 31,
             ------------------------------------------------------------------------------------------
             1998             1997                   1996                   1995                   1994
             ----             ----                   ----                   ----                   ----
             <S>              <C>                    <C>                    <C>                    <C>
             -- (a)           6.4                    6.1                    11.6                   9.8
</TABLE>
 
- --------
(a) Earnings were inadequate to cover fixed charges by $1.4 billion.
 
      For purposes of computing the ratios of earnings to fixed charges, we
have divided earnings (loss) before income tax expense (excluding interest
costs capitalized) plus fixed charges by fixed charges. Fixed charges consist
of interest costs (including interest costs capitalized) and estimated interest
included in rentals (one-third of net rental expense).
 
                                       21
<PAGE>
 
                                 CAPITALIZATION
 
      The following table sets forth the consolidated short-term debt and
capitalization of Motorola as of December 31, 1998, and as adjusted to give
effect to the sale of the Preferred Securities (after deducting underwriting
compensation and estimated offering expenses) and the anticipated application
of the net proceeds from such sale to reduce short-term indebtedness. From time
to time, Motorola may issue additional debt or equity securities. The following
information should be read in conjunction with Motorola's consolidated
financial statements, including the notes thereto, which are incorporated
herein by reference. See "Where You Can Find More Information."
 
<TABLE>
<CAPTION>
                                                       December 31, 1998
                                                   ----------------------------
                                                     Actual       As Adjusted
                                                   ------------  --------------
                                                   (in millions of dollars)
<S>                                                <C>           <C>
Short-Term Debt
  Commercial paper...............................  $      2,739    $      2,255
  Notes payable and other short-term debt........           162             162
  Current portion of long-term debt..............             8               8
                                                   ------------    ------------
    Total short-term debt........................  $      2,909    $      2,425
                                                   ============    ============
Long-Term Debt (a)
  Senior notes and debentures....................  $      2,481    $      2,481
  Other senior debt..............................           160             160
  Less current portion of long-term debt.........            (8)             (8)
                                                   ------------    ------------
    Total long-term debt.........................         2,633           2,633
                                                   ------------    ------------
Company-obligated mandatorily redeemable
 preferred securities of subsidiary trust holding
 solely company-guaranteed debentures (b)........           --              500
                                                   ------------    ------------
Stockholders' Equity (c)
  Common stock...................................         1,804           1,804
  Preferred stock................................           --              --
  Additional paid-in-capital.....................         2,164           2,164
  Retained earnings..............................         8,254           8,254
                                                   ------------    ------------
    Total stockholders' equity...................        12,222          12,222
                                                   ------------    ------------
    Total capitalization.........................  $     14,855    $     15,355
                                                   ============    ============
</TABLE>
- --------
(a) See Notes 3 and 4 of the Notes to Consolidated Financial Statements for
    December 31, 1997, incorporated by reference in the Form 10-K and
    incorporated herein by reference, for additional information on long-term
    debt.
(b) The sole assets of the Trust will be the Subordinated Debentures. Upon
    prepayment of the Subordinated Debentures, the related Preferred Securities
    will be mandatorily redeemable.
(c) See the Consolidated Financial Statements for December 31, 1997,
    incorporated by reference in the Form 10-K and incorporated herein by
    reference, and Notes 5 and 9 thereto for additional information on
    stockholders' equity.
 
                                       22
<PAGE>
 
                            SELECTED FINANCIAL DATA
 
                        MOTOROLA, INC. AND SUBSIDIARIES
 
<TABLE>
<CAPTION>
                                               Year Ended December 31,
                                       ----------------------------------------
                                        1998    1997(1)  1996    1995    1994
                                       -------  ------- ------- ------- -------
<S>                                    <C>      <C>     <C>     <C>     <C>
Operating Results:
Net sales............................  $29,398  $29,794 $27,973 $27,037 $22,245
                                       -------  ------- ------- ------- -------
Manufacturing and other cost of
 sales...............................   20,886   20,003  18,990  17,545  13,760
Selling, general and administrative
 expenses............................    5,493    5,188   4,715   4,642   4,381
Depreciation expense.................    2,197    2,329   2,308   1,919   1,525
Restructuring charges................    1,980      327     --      --      --
Interest expense, net................      216      131     185     149     142
                                       -------  ------- ------- ------- -------
Total costs and expenses.............   30,772   27,978  26,198  24,255  19,808
                                       -------  ------- ------- ------- -------
Net gain on Nextel asset exchange....      --       --      --      443     --
                                       -------  ------- ------- ------- -------
Earnings (loss) before income taxes..   (1,374)   1,816   1,775   3,225   2,437
Income tax (benefit) provision.......     (412)     636     621   1,177     877
                                       -------  ------- ------- ------- -------
Net earnings (loss)..................  $  (962) $ 1,180 $ 1,154 $ 2,048 $ 1,560
                                       =======  ======= ======= ======= =======
Per Share Data (2):
Basic earnings (loss)................  $ (1.61) $  1.98 $  1.95 $  3.47 $  2.76
Diluted earnings (loss)..............    (1.61)    1.94    1.90    3.37    2.66
Dividends declared...................  $  0.48  $  0.48 $  0.46 $  0.40 $  0.31
<CAPTION>
                                                 As of December 31,
                                       ----------------------------------------
                                        1998     1997    1996    1995    1994
                                       -------  ------- ------- ------- -------
<S>                                    <C>      <C>     <C>     <C>     <C>
Balance Sheet:
Total assets.........................  $28,728  $27,278 $24,076 $22,738 $17,495
Working capital......................    2,091    4,181   3,324   2,717   3,008
Long-term debt.......................    2,633    2,144   1,931   1,949   1,127
Total debt...........................    5,542    3,426   3,313   3,554   2,043
Total stockholders' equity...........  $12,222  $13,272 $11,795 $10,985 $ 9,055
</TABLE>
- --------
(1) Certain amounts have been reclassified to conform with the 1998
    presentation.
(2) Per share data reflects the requirements of Statement of Financial
    Accounting Standard No. 128.
 
                                       23
<PAGE>
 
                    DESCRIPTION OF THE PREFERRED SECURITIES
 
      Set forth below is a summary of the material terms of the Preferred
Securities that will be issued by the Trust pursuant to the terms of the
Declaration, which will be qualified as an indenture under the Trust Indenture
Act. The Property Trustee will act as the indenture trustee for purposes of
compliance with the provisions of the Trust Indenture Act. The terms of the
Preferred Securities will include those stated in the Declaration, including
those required to be made part of the Declaration by the Trust Indenture Act.
The following summary of the material terms and provisions of the Preferred
Securities does not purport to be complete and is subject to, and qualified in
its entirety by reference to, the Declaration, the Trust Act and the Trust
Indenture Act.
 
General
 
      The Declaration authorizes the Regular Trustees to cause the Trust to
issue the Trust Securities, which represent undivided beneficial interests in
the assets of the Trust. All of the Common Securities will be owned directly or
indirectly by Motorola. The Common Securities will have equivalent terms to and
will rank equal with, and payments will be made thereon on a pro rata basis
with, the Preferred Securities, except as described under "--Subordination of
Common Securities." In addition, holders of the Common Securities have the
exclusive right (subject to the terms of the Declaration) to appoint, replace
or remove any of the Trustees and to increase or decrease the number of
Trustees, provided that the number of Trustees shall be at least three. The
Declaration does not permit the issuance by the Trust of any securities other
than the Trust Securities or the incurrence of any indebtedness by the Trust.
 
      Pursuant to the Declaration, the Property Trustee will hold the
Subordinated Debentures purchased by the Trust for the benefit of the holders
of the Trust Securities. The payment of distributions out of money held by the
Trust, and payments upon redemption of the Preferred Securities or liquidation
of the Trust, are guaranteed by Motorola to the extent described under
"Description of the Trust Guarantee." The Trust Guarantee, when taken together
with the back-up undertakings, consisting of obligations of Motorola as set
forth in the Declaration (including the obligation to pay expenses of the
Trust), the Indenture and any applicable supplemental indentures thereto and
the Subordinated Debentures issued to the Trust, provide a full and
unconditional guarantee by Motorola of the amounts due on the Preferred
Securities. The Trust Guarantee will be held by the Guarantee Trustee for the
benefit of the holders of the Preferred Securities. The Trust Guarantee only
covers payment of distributions when Motorola has made the corresponding
payment of interest or principal on the Subordinated Debentures held by the
Trust. In the absence of such payment of interest or principal, the remedy of
any holder of Preferred Securities is to direct the Property Trustee to enforce
against Motorola the Property Trustee's rights as the holder of the
Subordinated Debentures, except in the limited circumstances where the holder
may take direct action against Motorola. See "--Voting Rights."
 
Distributions; Option to Extend Interest Payment Period
 
Rate
 
      Distributions on the Preferred Securities will be fixed at a rate per
annum of 6.68% of the stated liquidation amount of $25 per Preferred Security.
Distributions in arrears for more than one quarter will (to the extent
permitted by applicable law) accrue interest at the rate per annum of 6.68%
thereof compounded quarterly. The term "distributions" as used herein includes
any such interest payable unless otherwise stated. The amount of distributions
payable for any period will be computed on the basis of a 360-day year of
twelve 30-day months, and for any period shorter than a full quarter, on the
basis of the actual number of days elapsed in such 90-day quarter.
 
Dates
 
      Distributions on the Preferred Securities will be cumulative, will accrue
from February 3, 1999 and will be payable quarterly in arrears on March 31,
June 30, September 30 and December 31 of each year, commencing March 31, 1999
when, as and if available for payment by the Property Trustee, except
 
                                       24
<PAGE>
 
as otherwise described below. The initial cash distribution payable on March
31, 1999, will equal $.2691 for each $25 Preferred Security. Subsequent cash
distributions will equal $.4175 for each $25 Preferred Security.
 
Right to Defer
 
      Motorola has the right under the Indenture to defer payments of interest
on the Subordinated Debentures by extending the interest payment period from
time to time on the Subordinated Debentures, which, if exercised, would
automatically defer quarterly distributions on the Preferred Securities.
However, since interest would continue to accrue on the Subordinated Debentures
during any such extension period (each, an "Extension Period"), to the extent
permitted by law, such distributions would continue to accrue with interest.
Such right to extend the interest payment period for the Subordinated
Debentures is limited to a period not exceeding 20 consecutive quarters or
extending beyond the Maturity Date of the Subordinated Debentures. In the event
that Motorola exercises this right, then during any Extension Period Motorola
may not (a) declare or pay dividends on, make distributions with respect to, or
redeem, purchase, acquire or make a liquidation payment with respect to, any of
its capital stock, (b) make any payment of interest, principal or premium, if
any, on, or repay, repurchase or redeem, any debt securities issued by Motorola
that rank equal with or junior to the Subordinated Debentures or (c) make
guarantee payments with respect to the foregoing (other than pursuant to the
Trust Guarantee); provided, however, that the restriction in clause (a) does
not apply to (i) purchases or acquisitions of Motorola's capital stock in
connection with the satisfaction of its obligations under any employee benefit
plans, stock option plans, employee stock purchase plans or direct reinvestment
plans as may be in effect from time to time or the satisfaction of its
obligations pursuant to any contract or security outstanding on the date of
such event requiring Motorola to purchase its capital stock (other than a
contractual obligation ranking equal with or junior to the Subordinated
Debentures), (ii) reclassifications of Motorola's capital stock or the exchange
or conversion of one class or series of Motorola's capital stock for another
class or series of Motorola's capital stock, provided that such
reclassification, exchange or conversion does not result in a change in the
priority vis-a-vis the Preferred Securities of any class or series of capital
stock that is being so reclassified or that is the subject of such exchange or
conversion, (iii) purchases of fractional interests in shares of Motorola's
capital stock pursuant to the conversion or exchange provisions of such capital
stock or the security being converted or exchanged, (iv) stock dividends paid
by Motorola where the dividend stock is the same stock as that on which the
dividend is being paid or (v) redemptions or purchases of any rights pursuant
to purchase rights contained in any rights agreement as shall be in effect from
time to time, which purchase rights are substantially similar to those
contained in Motorola's current rights agreement. Prior to the termination of
any such Extension Period, Motorola may further extend the interest payment
period; provided that such Extension Period, together with all such previous
and further extensions thereof, may not exceed 20 consecutive quarters and may
not extend beyond the Maturity Date of the Subordinated Debentures. Upon the
termination of any Extension Period and the payment of all amounts then due,
Motorola may commence a new Extension Period, subject to the above
requirements. See "Description of the Subordinated Debentures--Interest" and
"--Option to Extend Interest Payment Period." If distributions are deferred,
the deferred distributions and accrued interest thereon shall be paid to
holders of record of the Preferred Securities as they appear on the books and
records of the Trust on the record date for distributions due at the end of
such deferral period. Motorola has no present intention of exercising its right
to defer payments of interest by extending the interest payment date of the
Subordinated Debentures.
 
Availability of Funds
 
      Distributions on the Preferred Securities must be paid on the dates
payable only to the extent that the Trust has funds available for the payment
of such distributions in the Property Trustee Account. The Trust's funds
available for distribution to the holders of the Preferred Securities will be
limited to payments received from Motorola under the Subordinated Debentures.
See "Description of the Subordinated Debentures" and "Risk Factors--Payments on
the Preferred Securities Are Entirely Dependent on Motorola Making Payments on
the Subordinated Debentures; The Trust Guarantee Covers Payments Only if the
Trust Has Cash Available."
 
                                       25
<PAGE>
 
Record Holders
 
      Distributions on the Preferred Securities will be payable to the holders
thereof as they appear on the books and records of the Trust on the relevant
record dates, which, as long as the Preferred Securities remain in global form,
will be one Business Day (as defined below) prior to the relevant payment
dates. Such distributions will be paid through the Property Trustee, who will
hold amounts received in respect of the Subordinated Debentures in the Property
Trustee Account for the benefit of the holders of the Trust Securities. Subject
to any applicable laws and regulations and the provisions of the Declaration,
each such payment will be made as described under "--Book-Entry Issuance--The
Depository Trust Company" below. In the event that the Preferred Securities do
not continue to remain in global form, the relevant record dates for the
Preferred Securities shall conform to the rules of any securities exchange on
which the Preferred Securities are listed and, if none, shall be selected by
the Regular Trustees, which dates shall be at least ten Business Days but less
than 60 Business Days prior to the relevant payment dates. Distributions
payable on any Preferred Securities that are not punctually paid on any
distribution payment date will cease to be payable to the person in whose name
such Preferred Securities are registered on the relevant record date, and such
defaulted distribution will instead be payable to the person in whose name such
Preferred Securities are registered on the special record date or other
specified date determined in accordance with the Declaration. In the event that
any date on which distributions are to be made on the Preferred Securities is
not a Business Day, then payment of the distributions payable on such date will
be made on the next succeeding day which is a Business Day (and without any
interest or other payment in respect of any such delay), except that, if such
Business Day is in the next succeeding calendar year, such payment shall be
made on the immediately preceding Business Day, in each case with the same
force and effect as if made on such record date. A "Business Day" shall mean
any day other than a day on which banking institutions in New York, New York
are authorized or required by law to close.
 
Subordination of Common Securities
 
      Payment of distributions on, and the Redemption Price of, the Preferred
Securities and Common Securities, as applicable, shall be made pro rata based
on the Liquidation Distribution of the Preferred Securities and Common
Securities; provided, however, that if on any payment date for distributions or
the Redemption Price an Indenture Event of Default (as defined under "--
Declaration Events of Default") shall have occurred and be continuing, no
payment of any distribution on, or applicable Redemption Price of, any of the
Common Securities, and no other payment on account of the redemption,
liquidation or other acquisition of the Common Securities, shall be made unless
payment in full in cash of all accumulated and unpaid distributions on all of
the outstanding Preferred Securities for all distribution periods terminating
on or prior thereto, or in the case of payment of the Redemption Price, the
full amount of such Redemption Price, shall have been made or provided for, and
all funds available to the Property Trustee shall first be applied to the
payment in full in cash of all distributions on, or the Redemption Price of,
the Preferred Securities then due and payable.
 
      In the case of any Declaration Event of Default (as defined under "--
Declaration Events of Default"), Motorola as holder of the Common Securities
will be deemed to have waived any right to act with respect to such Declaration
Event of Default until the effect of such Declaration Event of Default shall
have been cured, waived or otherwise eliminated. Until any such Declaration
Event of Default has been so cured, waived or otherwise eliminated, the
Property Trustee shall act solely on behalf of the holders of the Preferred
Securities and not on behalf of Motorola as holder of the Common Securities,
and only the holders of the Preferred Securities will have the right to direct
the Property Trustee to act on their behalf.
 
Mandatory Redemption
 
      Upon the repayment of the Subordinated Debentures, whether at maturity or
upon redemption, the proceeds from such repayment or redemption shall
simultaneously be applied to redeem Trust Securities having an aggregate
liquidation amount equal to the aggregate principal amount of the
 
                                       26
<PAGE>
 
Subordinated Debentures so repaid or redeemed at the Redemption Price; provided
that, holders of Trust Securities shall be given not less than 30 nor more than
60 days' notice of such redemption. See "--Special Event Redemption." The
Subordinated Debentures will mature on March 31, 2039 unless the Maturity Date
is changed at the option of Motorola (provided in the case of an extension of
the Maturity Date that certain financial conditions are met), and may be
redeemed, in whole or in part, at any time on or after February 3, 2004 or at
any time, in whole or in part, upon the occurrence of a Special Event. See
"Description of the Subordinated Debentures--Optional Redemption" and "--Option
to Change Scheduled Maturity Date." In the event that fewer than all of the
outstanding Trust Securities are to be redeemed, the Trust Securities will be
redeemed pro rata to each holder according to the aggregate liquidation amount
of Trust Securities held by the relevant holder in relation to the aggregate
liquidation amount of all Trust Securities outstanding. See "--Book-Entry
Issuance--The Depository Trust Company" below for a description of DTC's
procedures in the event of redemption.
 
Special Event Redemption
 
      If, at any time, a Tax Event or an Investment Company Event (each, as
defined below, a "Special Event") shall occur and be continuing, Motorola shall
have the right, upon not less than 30 nor more than 60 days' notice, to redeem
the Subordinated Debentures, in whole or in part, for cash within 90 days
following the occurrence of such Special Event, and, following such redemption,
Trust Securities with an aggregate liquidation amount equal to the aggregate
principal amount of the Subordinated Debentures so redeemed shall be redeemed
by the Trust at the Redemption Price on a pro rata basis.
 
      "Tax Event" means that the Regular Trustees shall have received an
opinion of an independent tax counsel experienced in such matters to the effect
that, as a result of (a) any amendment to, or change (including any announced
prospective change) in, the laws (or any regulations thereunder) of the United
States or any political subdivision or taxing authority thereof or therein or
(b) any official administrative pronouncement or judicial decision interpreting
or applying such laws or regulations, which amendment or change is effective or
such pronouncement or decision is announced on or after the date of original
issuance of the Preferred Securities, there is more than an insubstantial risk
that (i) the Trust is, or will be within 90 days after the date thereof,
subject to United States federal income tax with respect to interest accrued or
received on the Subordinated Debentures, (ii) the Trust is, or will be within
90 days after the date thereof, subject to more than a de minimis amount of
taxes, duties or other governmental charges, or (iii) interest payable to the
Trust on the Subordinated Debentures is not, or within 90 days of the date
thereof will not be, deductible, in whole or in part, by the Company for United
States federal income tax purposes.
 
      "Investment Company Event" means that the Regular Trustees shall have
received an opinion of an independent counsel experienced in practice under the
1940 Act, to the effect that, as a result of the occurrence of a change in law
or regulation or a change in interpretation or application of law or regulation
by any legislative body, court, governmental agency or regulatory authority (a
"Change in 1940 Act Law"), there is more than insubstantial risk that the Trust
is or will be considered an "investment company" which is required to be
registered under the 1940 Act, which Change in 1940 Act Law becomes effective
on or after the date of original issuance of the Preferred Securities.
 
Redemption Procedures
 
      The Trust may not redeem fewer than all of the outstanding Preferred
Securities unless all accrued and unpaid distributions have been paid on all
Preferred Securities for all quarterly distribution periods terminating on or
prior to the date of redemption. If a partial redemption of the Preferred
Securities would result in the delisting of the Preferred Securities by a
national securities exchange or other organization on which the Preferred
Securities are listed, then, pursuant to the Indenture, Motorola may only
redeem the Subordinated Debentures in whole and, as a result, the Trust may
only redeem the Preferred Securities in whole.
 
                                       27
<PAGE>
 
      If the Trust gives a notice of redemption in respect of Preferred
Securities (which notice will be irrevocable), then, by 12:00 noon, New York
City time, on the redemption date, provided that Motorola has paid to the
Property Trustee a sufficient amount of cash in connection with the related
redemption or maturity of the Subordinated Debentures, the Trust will
irrevocably deposit with DTC or its nominee funds sufficient to pay the
applicable Redemption Price and will give DTC irrevocable instructions to pay
the Redemption Price to the holders of the Preferred Securities. If notice of
redemption shall have been given and funds deposited as required, then
immediately prior to the close of business on the date of such deposit,
distributions will cease to accrue and all rights of holders of such Preferred
Securities so called for redemption will cease, except the right of the holders
of such Preferred Securities to receive the Redemption Price, but without
interest on such Redemption Price. In the event that any date fixed for
redemption of Preferred Securities is not a Business Day, then payment of the
Redemption Price payable on such date will be made on the next succeeding
Business Day (without any interest or other payment in respect of any such
delay), except that, if such Business Day falls in the next calendar year, such
payment will be made on the immediately preceding Business Day. In the event
that Motorola fails to repay the Subordinated Debentures on maturity or payment
of the Redemption Price in respect of Preferred Securities is improperly
withheld or refused and not paid either by the Trust or by Motorola pursuant to
the Trust Guarantee, distributions on such Preferred Securities will continue
to accrue at the then applicable rate from the original redemption date to the
actual date of payment, in which case the actual payment date will be
considered the date fixed for redemption for purposes of calculating the
Redemption Price.
 
      In the event that fewer than all of the outstanding Preferred Securities
are to be redeemed, the Preferred Securities will be redeemed as described
below under "--Book-Entry Issuance--The Depository Trust Company."
 
      Subject to the foregoing and applicable law (including, without
limitation, United States federal securities laws), Motorola or its
subsidiaries may at any time, and from time to time, purchase outstanding
Preferred Securities by tender offer, in the open market or by private
agreement.
 
Distribution of the Subordinated Debentures
 
      At any time, Motorola will have the right to terminate the Trust and,
after satisfaction of the liabilities of creditors of the Trust as provided by
applicable law, cause the Subordinated Debentures to be distributed to the
holders of the Trust Securities in liquidation of the Trust.
 
      Under current United States federal income tax law and interpretations
and assuming, as expected, the Trust is treated as a grantor trust, a
distribution of the Subordinated Debentures should not be a taxable event to
holders of the Preferred Securities. Should there be a change in such law, a
change in the legal interpretation thereof, a Special Event or other
circumstances, however, the distribution of the Subordinated Debentures could
be a taxable event to the holders of the Preferred Securities. In addition, a
dissolution of the Trust in which holders of the Preferred Securities receive
cash would be a taxable event to such holders. See "United States Federal
Income Taxation--US Holders--Receipt of Subordinated Debentures or Cash Upon
Liquidation of the Trust."
 
      If the Subordinated Debentures are distributed to the holders of the
Preferred Securities, Motorola will use its best efforts to cause the
Subordinated Debentures to be listed on the NYSE or on such other exchange,
interdealer quotation system or other organization as the Preferred Securities
are then listed.
 
      After the date for any distribution of Subordinated Debentures upon
dissolution of the Trust, (i) the Preferred Securities will no longer be deemed
to be outstanding, (ii) DTC or its nominee, as the record holder of the
Preferred Securities, will receive a registered global certificate or
certificates representing the Subordinated Debentures to be delivered upon such
distribution and (iii) any certificates
 
                                       28
<PAGE>
 
representing Preferred Securities not held by DTC or its nominee will be deemed
to represent Subordinated Debentures having an aggregate principal amount equal
to the aggregate stated liquidation amount of, with an interest rate identical
to the distribution rate of, and accrued and unpaid interest equal to accrued
and unpaid distributions on, such Preferred Securities until such certificates
are presented to Motorola or its agent for transfer or reissuance.
 
      If Motorola elects to liquidate the Trust and thereby causes the
Subordinated Debentures to be distributed to holders of the Preferred
Securities in liquidation of the Trust, Motorola shall have the right to
shorten the maturity of such Subordinated Debentures to a date not earlier than
February 3, 2004. In addition, Motorola would retain the right to extend the
maturity of such Subordinated Debentures to a date not later than the earlier
of (i) March 31, 2048 or (ii) the Interest Deduction Date, provided that it can
extend the maturity only if certain conditions are met. See "Description of the
Subordinated Debentures--Option to Change Scheduled Maturity Date."
 
      There can be no assurance as to the market prices for either the
Preferred Securities or the Subordinated Debentures that may be distributed in
exchange for the Preferred Securities if a dissolution and liquidation of the
Trust were to occur. Accordingly, the Preferred Securities that an investor may
purchase, whether pursuant to the offer made hereby or in the secondary market,
or the Subordinated Debentures that an investor may receive if a dissolution
and liquidation of the Trust were to occur, may trade at a discount to the
price that the investor paid to purchase the Preferred Securities offered
hereby.
 
Liquidation Distribution upon Dissolution
 
      In the event of any voluntary or involuntary liquidation, dissolution,
winding-up or termination of the Trust (each, a "Liquidation"), the then
holders of the Preferred Securities will be entitled to receive on a pro rata
basis solely out of the assets of the Trust, after satisfaction of liabilities
to creditors of the Trust as provided by applicable law, a Liquidation
Distribution in an amount equal to the aggregate of the stated liquidation
amount of $25 per Preferred Security plus accrued and unpaid distributions
thereon to the date of payment, unless, in connection with such Liquidation,
Subordinated Debentures in an aggregate stated principal amount equal to the
aggregate stated liquidation amount of, with an interest rate identical to the
distribution rate of, and accrued and unpaid interest equal to accrued and
unpaid distributions on, the Preferred Securities have been distributed on a
pro rata basis to the holders of the Preferred Securities.
 
      If, upon any such Liquidation, the Liquidation Distribution can be paid
only in part because the Trust has insufficient assets available to pay in full
the aggregate Liquidation Distribution, then the amounts payable directly by
the Trust on the Preferred Securities shall be paid on a pro rata basis. The
holders of the Common Securities will be entitled to receive distributions upon
any such dissolution pro rata with the holders of the Preferred Securities,
except that if an Indenture Event of Default has occurred and is continuing,
the Preferred Securities shall have a preference over the Common Securities
with respect to such distributions.
 
Termination
 
      Pursuant to the Declaration, the Trust shall dissolve upon the earliest
of (i) January 19, 2054, (ii) the bankruptcy of Motorola, (iii) the filing of a
certificate of dissolution or its equivalent with respect to Motorola or the
revocation of the charter of Motorola and the expiration of 90 days after the
date of revocation without a reinstatement thereof, (iv) the distribution of
the Subordinated Debentures from the Trust, (v) the entry of a decree of a
judicial dissolution of Motorola or the Trust, (vi) the redemption of all the
Trust Securities, (vii) the occurrence and continuance of a Special Event
pursuant to which the Trust shall have been dissolved and all Subordinated
Debentures shall have been distributed or (viii) before the issuance of any
Trust Securities, when all Regular Trustees and the Sponsor shall have
consented.
 
                                       29
<PAGE>
 
Declaration Events of Default
 
      An event of default under the Indenture (an "Indenture Event of Default")
constitutes an event of default under the Declaration with respect to the Trust
Securities (a "Declaration Event of Default"), provided that, pursuant to the
Declaration, the holder of the Common Securities will be deemed to have waived
any Declaration Event of Default with respect to the Common Securities until
all Declaration Events of Default with respect to the Preferred Securities have
been cured, waived or otherwise eliminated. See "Description of the
Subordinated Debentures--Indenture Events of Default." Until such Declaration
Event of Default with respect to the Preferred Securities has been so cured,
waived or otherwise eliminated, the Property Trustee will be deemed to be
acting solely on behalf of the holders of the Preferred Securities and only the
holders of the Preferred Securities will have the right to direct the Property
Trustee with respect to certain matters under the Declaration, and therefore
the Indenture.
 
      Upon the occurrence of a Declaration Event of Default, the Indenture
Trustee or the Property Trustee, as the holder of the Subordinated Debentures,
will have the right under the Indenture to declare the principal of and
interest on the Subordinated Debentures to be immediately due and payable.
Motorola and the Trust are each required to file annually with the Property
Trustee an officer's certificate as to its compliance with all conditions and
covenants under the Declaration.
 
Voting Rights
 
      Except as described herein or under "Description of the Trust Guarantee--
Modification of the Trust Guarantee; Assignment," as otherwise provided under
the Trust Act or the Trust Indenture Act or as otherwise required by law or the
Declaration, the holders of the Preferred Securities will have no voting
rights.
 
      Subject to the requirement of the Property Trustee obtaining a tax
opinion in certain circumstances set forth in the last sentence of this
paragraph, the holders of a majority of the Preferred Securities have the right
to direct the time, method and place of conducting any proceeding for any
remedy available to the Property Trustee, or direct the exercise of any trust
or power conferred upon the Property Trustee under the Declaration, including
the right to direct the Property Trustee, as holder of the Subordinated
Debentures, to (i) exercise the remedies available under the Indenture with
respect to the Subordinated Debentures, (ii) waive any past default and its
consequences that is waivable under the Indenture, (iii) exercise any right to
rescind or annul a declaration that the principal of all the Subordinated
Debentures shall be due and payable or (iv) consent to any amendment,
modification or termination of the Indenture or the Subordinated Debentures,
where such consent would be required; provided, however, that, where a consent
or action under the Indenture would require the consent or act of the holders
of greater than a majority in principal amount of Subordinated Debentures
affected thereby (a "Super Majority"), the Property Trustee may only give such
consent or take such action at the written direction of the holders of at least
the proportion of the Preferred Securities which the relevant Super Majority
represents of the aggregate principal amount of the Subordinated Debentures
outstanding. The Property Trustee shall, within 90 days after the occurrence of
an Indenture Event of Default, notify all holders of the Preferred Securities
of any notice of default received from the Indenture Trustee with respect to
the Subordinated Debentures. Except with respect to directing the time, method
and place of conducting a proceeding for a remedy, the Property Trustee shall
not take any of the actions described in clauses (i), (ii), (iii) or (iv) above
unless the Property Trustee has obtained an opinion of tax counsel to the
effect that, as a result of such action, the Trust will not be classified as
other than a grantor trust for United States federal income tax purposes.
 
      In the event the consent of the Property Trustee, as the holder of the
Subordinated Debentures, is required under the Indenture with respect to any
amendment, modification or termination of the Indenture or the Subordinated
Debentures, the Property Trustee shall request the direction of the holders of
the Trust Securities with respect to such amendment, modification or
termination and shall vote with respect to such amendment, modification or
termination as directed by a majority in liquidation amount of the Trust
Securities voting together as a single class; provided, however, that where a
consent under the
 
                                       30
<PAGE>
 
Indenture would require the consent of a Super Majority, the Property Trustee
may only give such consent at the direction of the holders of at least the
proportion in liquidation amount of the Trust Securities which the relevant
Super Majority represents of the aggregate principal amount of the Subordinated
Debentures outstanding. The Property Trustee shall not take any such action in
accordance with the directions of the holders of the Trust Securities unless
the Property Trustee has obtained an opinion of tax counsel to the effect that
the Trust will not be classified as other than a grantor trust for United
States federal income tax purposes on account of such action.
 
      A waiver of an Indenture Event of Default will constitute a waiver of the
corresponding Declaration Event of Default.
 
      Any required approval or direction of holders of Preferred Securities may
be given at a separate meeting of holders of Preferred Securities convened for
such purpose, at a meeting of all of the holders of Trust Securities or
pursuant to written consent. The Regular Trustees will cause a notice of any
meeting at which holders of Preferred Securities are entitled to vote, or of
any matter upon which action by written consent of such holders is to be taken,
to be mailed to each holder of record of Preferred Securities. Each such notice
will include a statement setting forth the following information: (i) the date
of such meeting or the date by which such action is to be taken; (ii) a
description of any resolution proposed for adoption at such meeting on which
such holders are entitled to vote or of such matter upon which written consent
is sought; and (iii) instructions for the delivery of proxies or consents. No
vote or consent of the holders of Preferred Securities will be required for the
Trust to redeem and cancel Preferred Securities or distribute Subordinated
Debentures in accordance with the Declaration.
 
      Notwithstanding that holders of Preferred Securities are entitled to vote
or consent under any of the circumstances described above, any of the Preferred
Securities that are owned at such time by Motorola or any entity directly or
indirectly controlling or controlled by, or under direct or indirect common
control with, Motorola, shall not be entitled to vote or consent and shall, for
purposes of such vote or consent, be treated as if such Preferred Securities
were not outstanding.
 
      The procedures by which holders of Preferred Securities may exercise
their voting rights are described under "--Book-Entry Issuance--The Depository
Trust Company" below.
 
      Holders of the Preferred Securities will have no rights to appoint or
remove the Trustees, who may be appointed, removed or replaced solely by
Motorola as the direct or indirect holder of all of the Common Securities.
 
Modification of the Declaration
 
      The Declaration may be modified and amended if approved by a majority of
the Regular Trustees (and, in certain circumstances, the Property Trustee
and/or the Delaware Trustee), provided that, if any proposed amendment provides
for, or the Regular Trustees otherwise propose to effect, (i) any action that
would adversely affect the powers, preferences or special rights of the Trust
Securities, whether by way of amendment to the Declaration or otherwise or (ii)
the dissolution, winding-up or termination of the Trust other than pursuant to
the terms of the Declaration, then the holders of the Trust Securities voting
together as a single class will be entitled to vote on such amendment or
proposal and such amendment or proposal shall not be effective except with the
approval of at least a majority of the Trust Securities affected thereby;
provided that, if any amendment or proposal referred to in clause (i) above
would adversely affect only the Preferred Securities or the Common Securities,
then only the affected class will be entitled to vote on such amendment or
proposal and such amendment or proposal shall not be effective except with the
approval of a majority of such class of Trust Securities.
 
      Notwithstanding the foregoing, no amendment or modification may be made
to the Declaration if such amendment or modification would (i) cause the Trust
to be classified as other than a grantor trust for United States federal income
tax purposes, (ii) reduce or otherwise adversely affect the powers of the
Property Trustee or (iii) cause a Special Event.
 
                                       31
<PAGE>
 
Mergers, Consolidations or Amalgamations
 
      The Trust may not consolidate, amalgamate, merge with or into or be
replaced by, or convey, transfer or lease its properties and assets
substantially as an entirety to, any corporation or other body, except as
described below. The Trust may, with the consent of a majority of the Regular
Trustees and without the consent of the holders of the Trust Securities, the
Property Trustee or the Delaware Trustee, consolidate, amalgamate, merge with
or into, or be replaced by a trust organized as such under the laws of any
State; provided that, (i) such successor entity either (A) expressly assumes
all of the obligations of the Trust under the Trust Securities or (B)
substitutes for the Trust Securities other securities having substantially the
same terms as the Trust Securities (the "Successor Securities"), so long as the
Successor Securities rank the same as the Trust Securities rank with respect to
distributions and payments upon liquidation, redemption and otherwise, (ii)
Motorola expressly acknowledges a trustee of such successor entity possessing
the same powers and duties as the Property Trustee as the holder of the
Subordinated Debentures, (iii) the Preferred Securities or any Successor
Securities with respect to the Preferred Securities are listed, or any such
Successor Securities will be listed upon notification of issuance, on any
national securities exchange or with another organization on which the
Preferred Securities are then listed or quoted, (iv) such merger,
consolidation, amalgamation or replacement does not cause the Preferred
Securities (including any Successor Securities with respect to the Preferred
Securities) to be downgraded by any nationally recognized statistical rating
organization, (v) such merger, consolidation, amalgamation or replacement does
not adversely affect the rights, preferences and privileges of the holders of
the Trust Securities (including any Successor Securities) in any material
respect (other than with respect to any dilution of the holders' interest in
the new entity), (vi) such successor entity has a purpose identical to that of
the Trust, (vii) prior to such merger, consolidation, amalgamation or
replacement, Motorola has received an opinion of an independent counsel to the
Trust experienced in such matters to the effect that, (A) such merger,
consolidation, amalgamation or replacement does not adversely affect the
rights, preferences and privileges of the holders of the Trust Securities
(including any Successor Securities) in any material respect (other than with
respect to any dilution of the holders' interest in the new entity), (B)
following such merger, consolidation, amalgamation or replacement, neither the
Trust nor such successor entity will be required to register as an investment
company under the 1940 Act and (C) the Trust will continue to be classified as
a grantor trust for federal income tax purposes, and (viii) Motorola guarantees
the obligations of such successor entity under the Successor Securities at
least to the extent provided by the Trust Guarantee. Notwithstanding the
foregoing, the Trust shall not, except with the consent of all holders of the
Trust Securities, consolidate, amalgamate, merge with or into, or be replaced
by any other entity or permit any other entity to consolidate, amalgamate,
merge with or into, or replace it, if such consolidation, amalgamation, merger
or replacement would cause the Trust or the Successor Entity to be classified
as other than a grantor trust for United States federal income tax purposes or
each holder of the Trust Securities not to be treated as owning an undivided
interest in the Subordinated Debentures.
 
Book-Entry Issuance--The Depository Trust Company
 
      DTC will act as securities depository for the Preferred Securities. The
Preferred Securities initially will be issued only as fully registered
securities registered in the name of Cede & Co. (DTC's nominee). One or more
fully registered global Preferred Securities certificates, representing the
total aggregate number of Preferred Securities, will be issued and delivered to
DTC.
 
      The laws of some jurisdictions require that certain purchasers of
securities take physical delivery of securities in definitive form. Such laws
may impair the ability to transfer beneficial interests in the global Preferred
Securities as represented by a global certificate.
 
      DTC has advised Motorola and the Trust that DTC is (i) a limited-purpose
trust company organized under the New York Banking Law, (ii) a "banking
organization" within the meaning of the New York Banking Law, (iii) a member of
the Federal Reserve System, (iv) a "clearing corporation" within the meaning of
the New York Uniform Commercial Code and (v) a "clearing agency" registered
pursuant to the provisions of Section 17A of the Exchange Act. DTC holds
securities that its participants
 
                                       32
<PAGE>
 
("Participants") deposit with DTC. DTC also facilitates the settlement among
Participants of securities transactions, such as transfers and pledges, in
deposited securities through electronic computerized book-entry changes in
Participants' accounts, thereby eliminating the need for physical movement of
securities certificates. Direct Participants include securities brokers and
dealers, banks, trust companies, clearing corporations and certain other
organizations ("Direct Participants"). DTC is owned by a number of its Direct
Participants and by the NYSE, the American Stock Exchange, Inc. and the
National Association of Securities Dealers, Inc. Access to the DTC system is
also available to others, such as securities brokers and dealers, banks and
trust companies that clear transactions through or maintain a direct or
indirect custodial relationship with a Direct Participant ("Indirect
Participants"). The rules applicable to DTC and its Participants are on file
with the SEC.
 
      Purchases of Preferred Securities within the DTC system must be made by
or through Direct Participants, which will receive a credit for the Preferred
Securities on DTC's records. The ownership interest of each actual purchaser of
each Preferred Security ("Beneficial Owner") is in turn to be recorded on the
Direct and Indirect Participants' records. Beneficial Owners will not receive
written confirmation from DTC of their purchases, but Beneficial Owners are
expected to receive written confirmations providing details of the
transactions, as well as periodic statements of their holdings, from the Direct
or Indirect Participants through which the Beneficial Owners purchased
Preferred Securities. Transfers of ownership interests in the Preferred
Securities are to be accomplished by entries made on the books of Participants
acting on behalf of Beneficial Owners. Beneficial Owners will not receive
certificates representing their ownership interests in the Preferred
Securities, except in the event that use of the book-entry system for the
Preferred Securities is discontinued.
 
      To facilitate subsequent transfers, all the Preferred Securities
deposited by Participants with DTC are registered in the name of DTC's nominee,
Cede & Co. The deposit of Preferred Securities with DTC and their registration
in the name of Cede & Co. effect no change in beneficial ownership. DTC has no
knowledge of the actual Beneficial Owners of the Preferred Securities. DTC's
records reflect only the identity of the Direct Participants to whose accounts
such Preferred Securities are credited, which may or may not be the Beneficial
Owners. The Participants will remain responsible for keeping account of their
holdings on behalf of their customers.
 
      Conveyance of notices and other communications by DTC to Direct
Participants, by Direct Participants to Indirect Participants and by Direct
Participants and Indirect Participants to Beneficial Owners will be governed by
arrangements among them, subject to any statutory or regulatory requirements
that may be in effect from time to time.
 
      Redemption notices shall be sent to Cede & Co. If less than all of the
Preferred Securities are being redeemed, DTC will reduce pro rata the amount of
the interest of each Direct Participant in such Preferred Securities to be
redeemed in accordance with its procedures.
 
      Although voting with respect to the Preferred Securities is limited, in
those cases where a vote is required, neither DTC nor Cede & Co. will itself
consent or vote with respect to Preferred Securities. Under its usual
procedures, DTC would mail an Omnibus Proxy to the Trust as soon as possible
after the record date. The Omnibus Proxy assigns Cede & Co.'s consenting or
voting rights to those Direct Participants to whose accounts the Preferred
Securities are credited on the record date (identified in a listing attached to
the Omnibus Proxy). Motorola and the Trust believe that the arrangements among
DTC, Direct and Indirect Participants, and Beneficial Owners will enable the
Beneficial Owners to exercise rights equivalent in substance to the rights that
can be directly exercised by a holder of a beneficial interest in the Trust.
 
      Distribution payments on the Preferred Securities will be made to DTC.
DTC's practice is to credit Direct Participants' accounts on the relevant
payment date in accordance with their respective holdings shown on DTC's
records unless DTC has reason to believe that it will not receive payments on
such payment date. Payments by Participants to Beneficial Owners will be
governed by standing instructions and customary practices, as is the case with
securities held for the account of customers in
 
                                       33
<PAGE>
 
bearer form or registered in "street name," and such payments will be the
responsibility of such Participant and not of DTC, the Trust or Motorola,
subject to any statutory or regulatory requirements that may be in effect from
time to time. Payment of distributions to DTC is the responsibility of the
Trust, disbursement of such payments to Direct Participants is the
responsibility of DTC, and disbursement of such payments to the Beneficial
Owners is the responsibility of Direct and Indirect Participants.
 
      Except as provided herein, a Beneficial Owner in a global Preferred
Security certificate will not be entitled to receive physical delivery of
Preferred Securities. Accordingly, each Beneficial Owner must rely on the
procedures of DTC to exercise any rights under the Preferred Securities.
 
      DTC may discontinue providing its services as depository with respect to
the Preferred Securities at any time by giving reasonable notice to the Trust.
Under such circumstances, in the event that a successor securities depository
is not obtained, Preferred Securities certificates would be required to be
printed and delivered. Additionally, the Regular Trustees (with the consent of
the Company) may decide to discontinue use of the system of book-entry
transfers through DTC (or any successor depository) with respect to the
Preferred Securities. In that event, certificates for the Preferred Securities
would be printed and delivered.
 
      We have been informed by DTC that its management is aware that some
computer applications, systems, and the like for processing data ("Systems")
that are dependent upon calendar dates, including dates before, on, and after
January 1, 2000, may encounter "Year 2000 problems." We have also been informed
by DTC that it has informed its Participants and other members of the financial
community (the "Industry") that it has developed and is implementing a program
so that its Systems, as the same relate to the timely payments of distributions
(including principal and income payments) to securityholders, book-entry
deliveries, and settlement of trades within DTC ("DTC Services"), continue to
function appropriately. According to DTC, this program includes a technical
assessment and a remediation plan, each of which is complete. Additionally, DTC
has informed us that its plan includes a testing phase, which is expected to be
completed within appropriate time frames.
 
      However, we have been informed by DTC that its ability to perform
properly its services is also dependent upon other parties, including but not
limited to issuers and their agents, as well as third party vendors from whom
DTC licenses software and hardware, and third party vendors on whom DTC relies
for information or the provision of services, including telecommunications and
electrical utility service providers, among others. DTC has informed us that it
is contacting (and will continue to contact) third party vendors from whom DTC
acquires services to: (1) impress upon them the importance of such services
being Year 2000 compliant; and (2) determine the extent of their efforts for
Year 2000 remediation (and, as appropriate, testing) of their services. In
addition, DTC has informed us that it is in the process of developing such
contingency plans as it deems appropriate.
 
      According to DTC, the foregoing information with respect to DTC has been
provided to the Industry for informational purposes only and is not intended to
serve as a representation, warranty, or contract modification of any kind.
 
      The information in this section concerning DTC and DTC's book-entry
system has been obtained from sources that Motorola and the Trust believe to be
reliable, but neither Motorola nor the Trust takes responsibility for the
accuracy thereof.
 
Information Concerning the Property Trustee
 
      The Property Trustee, prior to the occurrence of an event of default with
respect to the Trust Securities, undertakes to perform only such duties as are
specifically set forth in the Declaration, in the terms of the Trust Securities
or in the Trust Indenture Act and, after default, shall exercise the same
degree of care as a prudent individual would exercise in the conduct of his or
her own affairs. Subject to such provisions, the Property Trustee is under no
obligation to exercise any of the powers vested in it by
 
                                       34
<PAGE>
 
the Declaration at the request of any holder of Preferred Securities, unless
offered reasonable indemnity by such holder against the costs, expenses and
liabilities which might be incurred thereby. The holders of Preferred
Securities will not be required to offer such indemnity in the event such
holders, by exercising their voting rights, direct the Property Trustee to take
any action following a Declaration Event of Default. The Property Trustee also
serves as Guarantee Trustee.
 
      Harris is trustee under indentures with Motorola (i) dated as of March
15, 1985 relating to its 8.40% Debentures due August 15, 2031, (ii) dated as of
October 1, 1991 relating to its 7.60% Notes due January 1, 2007 and 6 1/2%
Notes due March 1, 2008 and (iii) dated as of May 1, 1995 relating to its 5.80%
Notes due October 15, 2008, 7 1/2% Debentures due May 15, 2025, 6 1/2%
Debentures due September 1, 2025, 6 1/2% Debentures due November 15, 2028 and
5.22% Debentures due October 1, 2097. Harris has also extended credit
facilities to Motorola and a subsidiary of Motorola and conducts business with
Motorola and certain of its affiliates, including cash management and stock
transfer services. Harris also serves as the rights agent under Motorola's
Rights Agreement dated as of November 5, 1998.
 
Paying Agent
 
      In the event that the Preferred Securities do not remain in book-entry
form, the following provisions would apply:
 
  .  The Property Trustee will act as paying agent, and may designate an
     additional or substitute paying agent at any time.
 
  .  Registration of transfers of Preferred Securities will be effected
     without charge by or on behalf of the Trust, but upon payment (with the
     giving of such indemnity as the Trust or Motorola may require) in
     respect of any tax or other government charges that may be imposed in
     relation to it.
 
  .  The Trust will not be required to register or cause to be registered the
     transfer of Preferred Securities after such Preferred Securities have
     been called for redemption.
 
Governing Law
 
      The Declaration and the Preferred Securities will be governed by, and
construed in accordance with, the internal laws of the State of Delaware.
 
Miscellaneous
 
      The Regular Trustees are authorized and directed to operate the Trust in
such a way so that the Trust will not be required to register as an "investment
company" under the 1940 Act or be characterized as other than a grantor trust
for United States federal income tax purposes. Motorola is authorized and
directed to conduct its affairs so that the Subordinated Debentures will be
treated as indebtedness of Motorola for United States federal income tax
purposes. In this connection, Motorola and the Regular Trustees are authorized
to take any action, not inconsistent with applicable law, the certificate of
trust of the Trust or the restated certificate of incorporation of Motorola, as
amended, that each of Motorola and the Regular Trustees determines in their
discretion to be necessary or desirable to achieve such end, as long as such
action does not adversely affect the interests of the holders of the Preferred
Securities or vary the terms thereof.
 
      Holders of the Preferred Securities have no preemptive rights.
 
      References in this prospectus to any payment, distribution or treatment
as being "pro rata" means pro rata to each holder of Trust Securities according
to the aggregate liquidation amount of the Trust Securities held by the
relevant holder in relation to the aggregate liquidation amount of all Trust
Securities outstanding unless, in relation to a payment, a Declaration Event of
Default has occurred and is continuing, in which case any funds available to
make such payment shall be paid first to each holder of
 
                                       35
<PAGE>
 
the Preferred Securities pro rata according to the aggregate liquidation amount
of Preferred Securities held by the relevant holder relative to the aggregate
liquidation amount of all Preferred Securities outstanding, and only after
satisfaction of all amounts owed to the holders of the Preferred Securities, to
each holder of Common Securities pro rata according to the aggregate
liquidation amount of Common Securities held by the relevant holder relative to
the aggregate liquidation amount of all Common Securities outstanding. When the
Property Trustee is making payments on the Trust Securities, it is entitled to
assume that no Declaration Event of Default has occurred and is continuing
unless the Declaration Event of Default is actually known to a responsible
officer of the Property Trustee.
 
                   DESCRIPTION OF THE SUBORDINATED DEBENTURES
 
      Set forth below is a description of the material terms of the
Subordinated Debentures in which the Trust will invest the proceeds from the
issuance and sale of the Trust Securities. The following description does not
purport to be complete and is subject to, and is qualified in its entirety by
reference to, the Indenture, dated as of February 3, 1999, as supplemented by a
Supplemental Indenture, dated as of February 3, 1999, between Motorola and
Harris as Indenture Trustee (the "Indenture"), each of which is filed as an
exhibit to the registration statement of which this prospectus forms a part.
Certain capitalized terms used herein are defined in the Indenture.
 
      At any time, Motorola will have the right to liquidate the Trust and
cause the Subordinated Debentures to be distributed to the holders of the Trust
Securities in liquidation of the Trust. See "Description of the Preferred
Securities--Distribution of the Subordinated Debentures."
 
      If the Subordinated Debentures are distributed to the holders of the
Preferred Securities, Motorola will use its best efforts to have the
Subordinated Debentures listed on the NYSE or on such other exchange on which
the Preferred Securities are then listed.
 
General
 
      The Subordinated Debentures:
 
  . will be issued as unsecured subordinated debt securities under the
    Indenture;
 
  . will be limited in aggregate principal amount to approximately $515
    million, such amount being the sum of the aggregate stated liquidation
    amount of the Preferred Securities and the capital contributed by
    Motorola in exchange for the Common Securities (the "Company Payment");
    and
 
  . will mature and become due and payable, together with any accrued and
    unpaid interest thereon including Compounded Interest (as defined under
    "--Option to Extend Interest Payment Period"), if any, on March 31, 2039,
    subject to the election of Motorola to shorten or extend the scheduled
    Maturity Date of the Subordinated Debentures, which election in the case
    of an extension of the scheduled Maturity Date is subject to Motorola's
    satisfying certain financial conditions. See "--Option to Change
    Scheduled Maturity Date."
 
      If Subordinated Debentures are distributed to holders of Preferred
Securities in liquidation of such holders' interests in the Trust, it is
presently anticipated that such Subordinated Debentures will initially be
issued in the form of one or more Global Securities (as defined under "--Book-
Entry and Settlement"). As described herein, under certain limited
circumstances, Subordinated Debentures may be issued in definitive certificated
form in exchange for a Global Security. See "--Book-Entry and Settlement"
below. In the event that Subordinated Debentures are issued in definitive
certificated form, such Subordinated Debentures will be in denominations of $25
and integral multiples thereof and may be transferred or exchanged at the
offices described below. Payments on Subordinated Debentures issued as a Global
Security will be made to DTC or its nominee, or a successor depository or its
nominee. In the event Subordinated Debentures are issued in definitive
certificated form, principal and interest will be
 
                                       36
<PAGE>
 
payable, the transfer of the Subordinated Debentures will be registrable and
Subordinated Debentures will be exchangeable for Subordinated Debentures of
other denominations of a like aggregate principal amount at the corporate trust
offices of the Indenture Trustee in Chicago, Illinois or that of any successor
Trustee; provided that payment of interest may be made at the option of
Motorola by check mailed to the address of the persons entitled thereto.
 
      The Indenture does not contain provisions that afford holders(s) of the
Subordinated Debentures protection in the event of a highly leveraged
transaction involving Motorola or other similar transaction that may adversely
affect such holders. The Subordinated Debentures are not entitled to the
benefit of any sinking fund provisions.
 
Subordination
 
      The Indenture provides that the Subordinated Debentures are subordinated
and junior in right of payment to the prior payment in full of all Senior
Indebtedness of Motorola whether now existing or hereafter incurred. In the
event and during the continuation of any default by Motorola in the payment of
principal, premium, interest or any other payment due on any Senior
Indebtedness of Motorola, or in the event that the maturity of any Senior
Indebtedness of Motorola has been accelerated because of a default, then in
either case, no payment will be made by Motorola with respect to the principal
(including redemption payments) of or interest on the Subordinated Debentures.
Upon any distribution of assets of Motorola to creditors upon any dissolution,
winding-up, liquidation or reorganization, whether voluntary or involuntary, or
in bankruptcy, insolvency, receivership or other proceedings, all principal,
premium, if any, and interest due or to become due on all Senior Indebtedness
of Motorola must be paid in full before the holders of Subordinated Debentures
are entitled to receive or retain any payment. In the event that the
Subordinated Debentures are declared due and payable before the Maturity Date,
then all amounts due or to become due on all Senior Indebtedness shall have
been paid in full before holders of the Subordinated Debentures are entitled to
receive or retain any payment. Upon satisfaction of all claims of all Senior
Indebtedness then outstanding, the rights of the holders of the Subordinated
Debentures will be subrogated to the rights of the holders of Senior
Indebtedness of Motorola to receive payments or distributions applicable to
Senior Indebtedness until all amounts owing on the Subordinated Debentures are
paid in full.
 
      The term "Senior Indebtedness" means all indebtedness of Motorola,
whether now existing or hereafter created, but excluding trade accounts payable
arising in the ordinary course of business, and includes all series of
Motorola's outstanding LYONs(TM). Without limiting the generality of the
foregoing, "Senior Indebtedness" shall include the principal of, premium, if
any, and interest on: (i) all indebtedness of Motorola outstanding, created,
incurred or assumed, which is for money borrowed, or evidenced by a note or
similar instrument given in connection with the acquisition of any business,
properties or assets, including securities; (ii) any indebtedness of others of
the kinds described in the preceding clause (i) for the payment of which
Motorola is responsible or liable as guarantor or otherwise; and (iii)
amendments, renewals, extensions and refundings of any such indebtedness,
unless in any instrument or instruments evidencing or securing such
indebtedness or pursuant to which the same is outstanding, or in any such
amendment, renewal, extension or refunding, it is expressly provided that such
indebtedness is not superior in right of payment to the Subordinated
Debentures. "Senior Indebtedness" does not include any indebtedness of Motorola
to any of its Subsidiaries. Senior Indebtedness shall continue to be Senior
Indebtedness and entitled to the benefits of the subordination provisions
irrespective of any amendment, modification or waiver of any term of the Senior
Indebtedness or extension or renewal of the Senior Indebtedness.
 
      The Indenture does not limit the aggregate amount of Senior Indebtedness
that may be issued by Motorola. At December 31, 1998, the aggregate amount of
Senior Indebtedness and liabilities and obligations of Motorola's subsidiaries
that would have effectively ranked senior to the Subordinated Debentures was
approximately $10.6 billion.
 
                                       37
<PAGE>
 
      The Indenture does not limit the amount of additional indebtedness
Motorola or any of its subsidiaries may incur. The Subordinated Debentures will
be obligations exclusively of Motorola. Since the operations of Motorola are
partially conducted through subsidiaries, its cash flow and consequent ability
to service debt, including the Subordinated Debentures, are partially dependent
upon the earnings of its subsidiaries. The subsidiaries are separate and
distinct legal entities and have no obligation, contingent or otherwise, to pay
any amounts due pursuant to the Subordinated Debentures or to make funds
available therefor, whether by dividends, loans or other payments. In addition,
the payment of dividends and the making of loans and advances to Motorola by
its subsidiaries may be subject to statutory or contractual restrictions, are
contingent upon the earnings of those subsidiaries, and are subject to various
business considerations.
 
      Any right of Motorola to receive assets of any of its subsidiaries upon
their liquidation or reorganization (and the right of the holder(s) of the
Subordinated Debentures to participate in those assets) will be effectively
subordinated to the claims of that subsidiary's creditors (including trade
creditors), except to the extent that Motorola is itself recognized as a
creditor of such subsidiary, in which case the claims of Motorola would be
subordinate to any security interests in the assets of such subsidiary and any
indebtedness of such subsidiary senior to that held by Motorola. As of December
31, 1998, Motorola's subsidiaries had outstanding approximately $4.0 billion of
liabilities.
 
Optional Redemption
 
      Motorola shall have the right to redeem the Subordinated Debentures (i)
at any time, in whole or in part, from time to time, on or after February 3,
2004 or (ii) at any time, in whole or in part, upon the occurrence of a Special
Event as described under "Description of the Preferred Securities--Special
Event Redemption," upon not less than 30 nor more than 60 days' notice, at an
amount equal to the Redemption Price. If a partial redemption of the Preferred
Securities resulting from a partial redemption of the Subordinated Debentures
would result in the delisting of the Preferred Securities, Motorola may only
redeem the Subordinated Debentures in whole.
 
Interest
 
      Each Subordinated Debenture shall bear interest at the rate of 6.68% per
annum from the original date of issuance, or from the most recent interest
payment date to which interest has been paid or provided for, payable quarterly
in arrears on March 31, June 30, September 30 and December 31 of each year
(each an "Interest Payment Date"), commencing March 31, 1999, to the person in
whose name such Subordinated Debenture is registered, subject to certain
exceptions, at the close of business on the Business Day next preceding such
Interest Payment Date. In the event the Preferred Securities are no longer in
book-entry only form, or if the Subordinated Debentures shall be distributed to
the holders of the Preferred Securities and shall not be in book-entry form,
Motorola shall have the right to select record dates, which shall conform to
the rules of any securities exchange on which the Subordinated Debentures are
then listed and shall be at least ten Business Days but less than 60 Business
Days prior to the Interest Payment Date. Any installment of interest not
punctually paid will cease to be payable to the holders of the Subordinated
Debentures on the regular record date and may be paid to the person in whose
name the Subordinated Debentures are registered at the close of business on a
special record date to be fixed by the Indenture Trustee for the payment of
such defaulted interest, notice of which shall be given to the holders of the
Subordinated Debentures not less than ten days prior to such special record
date, or may be paid at any time in any other lawful manner not inconsistent
with the requirements of any securities exchange, interdealer quotation system
or other organization on which the Subordinated Debentures may be listed, and
upon such notice as may be required by such exchange, system or organization.
 
      The amount of interest payable for any period will be computed on the
basis of a 360-day year of twelve 30-day months. The amount of interest payable
for any period shorter than a full quarterly period for which interest is
computed, will be computed on the basis of the actual number of days elapsed
per 90-day quarter. In the event that any date on which interest is payable on
the Subordinated Debentures is not a Business Day, then payment of the interest
payable on such date will be made on the next succeeding Business Day (and
without any interest or other payment in respect of any such delay),
 
                                       38
<PAGE>
 
except that, if such Business Day is in the next succeeding calendar year, then
such payment shall be made on the immediately preceding Business Day, in each
case with the same force and effect as if made on such date.
 
Option to Change Scheduled Maturity Date
 
      The "Scheduled Maturity Date" of the Subordinated Debentures is March 31,
2039. Motorola, however, may extend such maturity date (March 31, 2039 or the
maturity date then in effect, as the case may be, is referred to herein as the
"Maturity Date") for one or more periods but in no event later than the earlier
of (i) March 31, 2048 or (ii) the Interest Deduction Date. The "Interest
Deduction Date" shall mean the date which is six months earlier than the ending
date of the maximum term (beginning on the date of issue of the Subordinated
Debentures and including any extensions thereof), as determined under any
federal statute applicable by its terms to the Subordinated Debentures which is
enacted at any time after the issuance of the Subordinated Debentures
(including, but not limited to, at any time after an extension of the Maturity
Date), of a debt instrument for which interest is deductible for federal income
tax purposes. In no event shall the extended Maturity Date be later than the
Interest Deduction Date even if the Maturity Date has previously been extended
to a date beyond the Interest Deduction Date. Motorola must exercise its right
to extend the term at least 90 days prior to the Maturity Date then in effect
and must satisfy the following conditions on the date Motorola exercises such
right and on the Maturity Date then in effect prior to such proposed extension:
(a) Motorola is not in bankruptcy or otherwise insolvent, (b) Motorola is not
in default on any Subordinated Debenture issued to the Trust or to any trustee
of the Trust in connection with an issuance of Trust Securities by the Trust,
(c) Motorola has made timely payments on the Subordinated Debentures for the
immediately preceding six quarters without deferrals, (d) the Trust is not in
arrears on payments of distributions on the Trust Securities, (e) the
Subordinated Debentures or Preferred Securities are rated investment grade by
any one of Standard & Poor's Ratings Services, a division of The McGraw-Hill
Companies, Inc., Moody's Investors Service, Inc., Fitch Investor Services, Duff
& Phelps Credit Rating Company or any other nationally recognized statistical
rating organization and (f) the final maturity of such Subordinated Debentures
is not later than March 31, 2048. Pursuant to the Declaration, the Regular
Trustees are required to give notice of Motorola's election to change the
Maturity Date to the holders of the Preferred Securities.
 
      In addition, if Motorola exercises its right to liquidate the Trust and
distribute the Subordinated Debentures as discussed above under "Description of
the Preferred Securities--Distribution of the Subordinated Debentures,"
effective upon such exercise the Maturity Date of the Subordinated Debentures
may be changed to any date elected by Motorola that is no earlier than February
3, 2004. In addition, the Company would retain the right to extend the maturity
of the Subordinated Debentures to any date elected by Motorola which is not
later than the earlier of (a) March 31, 2048 or (b) the Interest Deduction
Date; provided that on the date Motorola exercises such right and on the
Maturity Date in effect prior to such proposed extension the conditions
specified in the previous paragraph are satisfied.
 
Option to Extend Interest Payment Period
 
      Motorola has the right at any time, and from time to time, during the
term of the Subordinated Debentures to defer payments of interest by extending
the interest payment period for a period not exceeding 20 consecutive quarters,
at the end of which Extension Period, Motorola shall pay all interest then
accrued and unpaid, together with interest thereon compounded quarterly at the
rate specified for the Subordinated Debentures to the extent permitted by
applicable law ("Compounded Interest"); provided that no Extension Period shall
extend beyond the Maturity Date; and provided further that, during any such
Extension Period, Motorola may not (a) declare or pay dividends on, make
distributions with respect to, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of its capital stock, (b) make any
payment of interest, principal or premium, if any, on or repay, repurchase or
redeem any debt securities issued by Motorola that rank equal with or junior to
the Subordinated Debentures or (c) make guarantee payments with respect to the
foregoing (other than pursuant to the Trust Guarantee);
 
                                       39
<PAGE>
 
provided, further, that the restriction in clause (a) does not apply to (i)
purchases or acquisitions of Motorola's capital stock in connection with the
satisfaction of its obligations under any employee benefit plans, stock option
plans, employee stock purchase plans or direct reinvestment plans as may be in
effect from time to time or the satisfaction of its obligations pursuant to any
contract or security outstanding on the date of such event requiring Motorola
to purchase its capital stock (other than a contractual obligation ranking
equal with or junior to the Subordinated Debentures), (ii) reclassifications of
Motorola's capital stock or the exchange or conversion of one class or series
of Motorola's capital stock for another class or series of Motorola's capital
stock, provided that such reclassification, exchange or conversion does not
result in a change in the priority vis-a-vis the Preferred Securities of any
class or series of capital stock that is being so reclassified or that is the
subject of such exchange or conversion, (iii) purchases of fractional interests
in shares of Motorola's capital stock pursuant to the conversion or exchange
provisions of such capital stock or the security being converted or exchanged,
(iv) stock dividends paid by Motorola where the dividend stock is the same
stock as that on which the dividend is being paid or (v) redemptions or
purchases of any rights pursuant to purchase rights contained in any rights
agreement as shall be in effect from time to time, which purchase rights are
substantially similar to those contained in Motorola's current rights
agreement. Prior to the termination of any such Extension Period, Motorola may
further defer payments of interest by extending the interest payment period;
provided, however, that such Extension Period, including all such previous and
further extensions, may not exceed 20 consecutive quarters or extend beyond the
Maturity Date. Upon the termination of any Extension Period and the payment of
all amounts then due, Motorola may commence a new Extension Period, subject to
the terms set forth in this section. No interest during an Extension Period,
except at the end thereof, shall be due and payable. Motorola has no present
intention of exercising its right to defer payments of interest by extending
the interest payment period on the Subordinated Debentures.
 
      If the Property Trustee shall be the sole holder of the Subordinated
Debentures, Motorola shall give the Regular Trustees and the Property Trustee
notice of its selection of such Extension Period one Business Day prior to the
earlier of (i) the date distributions on the Preferred Securities are payable
or (ii) the date the Regular Trustees are required to give notice to holders of
the Preferred Securities (or to any national securities exchange or other
organization on which the Preferred Securities are listed) of the record date
or the date such distribution is payable. The Regular Trustees shall give
notice of Motorola's selection of such Extension Period to the holders of the
Preferred Securities. If the Property Trustee shall not be the sole holder of
the Subordinated Debentures, Motorola shall give the holders of the
Subordinated Debentures notice of its selection of such Extension Period ten
Business Days prior to the earlier of (i) the next succeeding Interest Payment
Date or (ii) the date upon which Motorola is required to give notice to holders
of the Subordinated Debentures (or to any national securities exchange or other
organization on which the Subordinated Debentures are listed) of the record or
payment date of such related interest payment.
 
Additional Interest
 
      If the Trust or the Property Trustee is required to pay any taxes,
duties, assessments or governmental charges (other than withholding taxes),
Motorola will pay as additional interest on the Subordinated Debentures held by
the Property Trustee, such additional amounts as shall be required so that the
net amounts received and retained by the Trust and the Property Trustee after
paying such taxes, duties, assessments or other governmental charges will be
equal to the amounts the Trust and the Property Trustee would have received had
no such taxes, duties, assessments or other governmental charges been imposed.
 
Certain Covenants
 
      Motorola has covenanted, with respect to the Subordinated Debentures,
that for so long as the Preferred Securities and the Common Securities remain
outstanding Motorola will (i) maintain 100% direct or indirect ownership of the
Common Securities; provided, however, that any permitted successor of Motorola
under the Indenture may succeed to Motorola's ownership of the Common
Securities, (ii) not voluntarily dissolve, wind-up or terminate the Trust,
except in connection with the distribution of
 
                                       40
<PAGE>
 
Subordinated Debentures or certain mergers, consolidations or amalgamations,
each as permitted by the Declaration, (iii) timely perform its duties as
sponsor of the Trust, (iv) use its reasonable efforts to cause the Trust (a) to
remain a business trust, except in connection with a distribution of the
Subordinated Debentures, the redemption of all of the Preferred Securities and
Common Securities of the Trust or certain mergers, consolidations or
amalgamations, each as permitted by the Declaration, and (b) otherwise continue
not to be treated as an association taxable as a corporation or partnership for
United States federal income tax purposes and (v) to use its reasonable efforts
to cause each holder of Preferred Securities and Common Securities to be
treated as owning an individual beneficial interest in the Subordinated
Debentures.
 
Consolidation, Merger, Conveyance, Transfer or Lease
 
      Motorola, without the consent of any holder of Subordinated Debentures,
may consolidate or merge with or into, or transfer or lease its assets
substantially as an entirety to, any entity, and any other entity may
consolidate or merge with or into, or transfer or lease its assets
substantially as an entirety to, Motorola; provided that (i) the entity (if
other than Motorola) formed by such consolidation or into which Motorola is
merged or which acquires or leases such assets of Motorola is organized and
existing under the laws of any United States jurisdiction and assumes
Motorola's obligations on the Subordinated Debentures and under the Indenture,
(ii) after giving effect to such transaction, no Indenture Event of Default,
and no event which, after notice or lapse of time or both, would become an
Indenture Event of Default, shall have happened and be continuing and (iii)
certain other conditions are met.
 
Indenture Events of Default
 
      The following are Indenture Events of Default: (a) failure to pay
principal of (or premium, if any) on the Subordinated Debentures when due; (b)
failure to pay any installment of interest on the Subordinated Debentures when
due (other than pursuant to Motorola's deferral rights), which failure shall
continue for 30 days; (c) failure to perform any other covenant of Motorola in
the Indenture (other than a covenant included in the Indenture solely for the
benefit of any series of securities other than the Subordinated Debentures),
continued for 60 days after written notice as provided in the Indenture; and
(d) certain events in bankruptcy, insolvency or reorganization. If an Indenture
Event of Default with respect to the Subordinated Debentures shall occur and be
continuing, either the Indenture Trustee or the holders of at least 25% in
principal amount of the Subordinated Debentures may declare the principal
amount of and interest on the Subordinated Debentures (including any Compounded
Interest and any other amounts payable under the Indenture) to be due and
payable immediately; provided that, in the case of certain events of
bankruptcy, insolvency or reorganization, such principal amount (or portion
thereof) shall automatically become due and payable. However, at any time after
an acceleration with respect to the Subordinated Debentures has occurred, but
before a judgment or decree based on such acceleration has been obtained, the
holders of a majority in principal amount of the Subordinated Debentures may,
under certain circumstances, rescind and annul such acceleration.
 
      The Indenture provides that, subject to the duty of the Indenture Trustee
during default to act with the required standard of care, the Indenture Trustee
will be under no obligation to exercise any of its rights or powers under the
Indenture at the request or direction of any of the holders, unless such
holders shall have offered to the Indenture Trustee reasonable security or
indemnity. Subject to such provisions for indemnification of the Indenture
Trustee and certain other limitations, the holders of a majority in principal
amount of the Subordinated Debentures will have the right to direct the time,
method and place of conducting any proceeding for any remedy available to the
Indenture Trustee, or exercising any trust or power conferred on the Indenture
Trustee, with respect to the Subordinated Debentures.
 
      An Indenture Event of Default also constitutes a Declaration Event of
Default. If any Indenture Event of Default shall occur and be continuing, the
Property Trustee, as the holder of the Subordinated Debentures, will have the
right to declare the principal of and the interest on the Subordinated
Debentures (including any Compounded Interest and any other amounts payable
under the Indenture) to be forthwith due and payable immediately and to enforce
its other rights as a creditor with respect to the Subordinated
 
                                       41
<PAGE>
 
Debentures. If the Property Trustee fails to enforce its rights with respect to
the Subordinated Debentures held by the Trust to the fullest extent permitted
by law, any holder of Preferred Securities may institute legal proceedings
directly against Motorola to enforce the Property Trustee's rights under such
Subordinated Debentures without first instituting any legal proceedings against
the Property Trustee or any other person or entity. Notwithstanding the
foregoing, if a Declaration Event of Default has occurred and is continuing and
such event is attributable to the failure of Motorola to pay interest or
principal on the Subordinated Debentures issued to the Trust on the date such
interest or principal is otherwise payable, then any holder of Preferred
Securities may institute a proceeding directly against Motorola for enforcement
of payment to the holder of the Preferred Securities of the principal of or
interest on the Subordinated Debentures on or after the respective due dates
specified in the Subordinated Debentures (taking into account any Extension
Periods), and the amount of the payment will be based on the holder's pro rata
share of the amount due and owing on all of the Preferred Securities. The
holders of Preferred Securities in certain circumstances have the right to
direct the Property Trustee to exercise its rights, with respect to other than
principal and interest payments on the Subordinated Debentures, as the holder
of the Subordinated Debentures. See "Description of the Preferred Securities--
Declaration Events of Default" and "Description of the Preferred Securities--
Voting Rights."
 
      The rights of the holders of Preferred Securities and the Property
Trustee upon the occurrence of an Indenture Event of Default or a Declaration
Event of Default are subject to the subordination provisions of the Indenture,
as described under "--Subordination."
 
      Motorola will be required to furnish to the Indenture Trustee annually a
statement as to the performance by Motorola of certain of its obligations under
the Indenture and as to any default in such performance.
 
Defeasance and Covenant Defeasance
 
      The Indenture provides that Motorola may elect either (A) to defease and
be discharged from any and all obligations in respect of the Subordinated
Debentures (except for certain obligations to register the transfer or exchange
of the Subordinated Debentures, to replace temporary, destroyed, stolen, lost
or mutilated certificates, to maintain paying agencies and to hold monies for
payment in trust) ("defeasance") or (B) to omit to comply with substantially
all of the restrictive covenants in the Indenture ("covenant defeasance"), in
either case upon the deposit with the Indenture Trustee (or other qualifying
trustee), in trust, of money and/or U.S. government obligations, which through
the payment of interest and principal in respect thereof in accordance with
their terms will provide money in an amount sufficient to pay the principal of
(and premium, if any) and each installment of interest, if any, on the
Subordinated Debentures as and when due. Such a trust may only be established
if, among other things, Motorola has delivered to the Indenture Trustee an
opinion of counsel (who may be counsel for Motorola) to the effect that the
holders of the Subordinated Debentures will not recognize income, gain or loss
for federal income tax purposes as a result of such defeasance or covenant
defeasance and will be subject to federal income tax on the same amount and in
the same manner and at the same times as would have been the case if such
deposit and defeasance had not occurred. Such opinion, in the case of
defeasance under clause (A) above, must refer to and be based upon a ruling of
Internal Revenue Service or a change in applicable Federal income tax law
occurring after the date of the Indenture.
 
      In the event Motorola exercises its option to omit compliance with
certain covenants of the Indenture as described above and the Subordinated
Debentures are declared due and payable because of the occurrence of any
Indenture Event of Default, the amount of money and U.S. government obligations
on deposit with the Indenture Trustee would be sufficient to pay amounts due on
the Subordinated Debentures as and when due, but might not be sufficient to pay
amounts due on the Subordinated Debentures at the time of the acceleration
resulting from such Indenture Event of Default. However, Motorola would remain
liable for such payments.
 
                                       42
<PAGE>
 
Modification and Waiver
 
      Modifications and amendments of the Indenture may be made by Motorola and
the Indenture Trustee with the consent of the holders of a majority in
principal amount of the Subordinated Debentures; provided, however, that no
such modification or amendment may, without the consent of the holder(s) of
each of the Subordinated Debentures, (a) change the stated maturity date of the
principal of, or any installment of principal of or interest on, any
Subordinated Debenture, (b) reduce the principal amount of (or premium, if any)
or interest, if any, on, any Subordinated Debenture, (c) change the place or
currency of payment of principal of (or premium, if any) or interest, if any,
on, any Subordinated Debenture, (d) impair the right to institute suit for the
enforcement of any payment on or with respect to any Subordinated Debenture or
(e) reduce the percentage in principal amount of the Subordinated Debentures,
the consent of the holders of which is required for modification or amendment
of the Indenture or for waiver of compliance with certain provisions of the
Indenture or for waiver of certain defaults.
 
      The holders of a majority in principal amount of the Subordinated
Debentures may on behalf of the holders of all Subordinated Debentures waive
compliance by Motorola with certain restrictive provisions of the Indenture.
The holders of a majority in principal amount of the Subordinated Debentures
may on behalf of the holders of all Subordinated Debentures waive any past
default under the Indenture with respect to the Subordinated Debentures except
a default in the payment of the principal of (or premium, if any) or interest,
if any, on any Subordinated Debenture or in respect of any provision which
under the Indenture cannot be modified or amended without the consent of the
holder(s) of each Subordinated Debenture.
 
Book-Entry and Settlement
 
      If distributed to holders of Preferred Securities in connection with the
involuntary or voluntary dissolution, winding-up or liquidation of the Trust,
it is presently anticipated that the Subordinated Debentures will be issued in
the form of one or more global certificates (each a "Global Security")
registered in the name of DTC or its nominee. Except under the limited
circumstances described below, Subordinated Debentures represented by the
Global Security will not be exchangeable for, and will not otherwise be
issuable as, Subordinated Debentures in definitive form. The Global Securities
described above may not be transferred except by the depository to a nominee of
the depository or by a nominee of the depository to the depository or another
nominee of the depository or to a successor depository or its nominee.
 
      The laws of some jurisdictions require that certain purchasers of
securities take physical delivery of such securities in definitive form. Such
laws may impair the ability to transfer beneficial interests in such a Global
Security.
 
      Except as provided below under "--Discontinuance of Depository Services,"
owners of beneficial interests in such a Global Security will not be entitled
to receive physical delivery of Subordinated Debentures in definitive form and
will not be considered the holders (as defined in the Indenture) thereof for
any purpose under the Indenture, and no Global Security representing
Subordinated Debentures shall be exchangeable, except for another Global
Security of like denomination and tenor to be registered in the name of the
depository or its nominee or to a successor depository or its nominee.
Accordingly, each beneficial owner must rely on the procedures of the
depository or if such person is not a Participant, on the procedures of the
Participant through which such person owns its interest to exercise any rights
of a holder under the Indenture.
 
The Depository
 
      If Subordinated Debentures are distributed to holders of Preferred
Securities in liquidation of such holders' interests in the Trust, DTC will act
as securities depository for the Subordinated Debentures. For a description of
DTC and the specific terms of the depository arrangements, see "Description of
the Preferred Securities--Book-Entry Issuance--The Depository Trust Company."
As of
 
                                       43
<PAGE>
 
the date of this prospectus, the description therein of DTC's book-entry system
and DTC's practices as they relate to purchases, transfers, notices and
payments with respect to the Preferred Securities apply in all material
respects to any debt obligations represented by one or more Global Securities
held by DTC. Motorola may appoint a successor to DTC or any successor
depository in the event DTC or such successor depository is unable or unwilling
to continue as the depository for the Global Securities.
 
      None of Motorola, the Trust, the Indenture Trustee, any paying agent and
any other agent of Motorola or the Indenture Trustee will have any
responsibility or liability for any aspect of the records relating to or
payments made on account of beneficial ownership interests in a Global Security
for such Subordinated Debentures or for maintaining, supervising or reviewing
any records relating to such beneficial ownership interests.
 
Discontinuance of the Depository's Services
 
      A Global Security shall be exchangeable for Subordinated Debentures in
definitive certificated form registered in the names of persons other than the
depository or its nominee only if (i) the depository notifies Motorola that it
is unwilling or unable to continue as a depository for such Global Security and
no successor depository shall have been appointed, (ii) the depository, at any
time, ceases to be a clearing agency registered under the Exchange Act at which
time the depository is required to be so registered to act as such depository
and no successor depository shall have been appointed or (iii) Motorola, in its
sole discretion, determines that such Global Security shall be so exchangeable.
Any Global Security that is exchangeable pursuant to the preceding sentence
shall be exchangeable for Subordinated Debentures registered in such names as
the depository shall direct. It is expected that such instructions will be
based upon directions received by the depository from its Participants with
respect to ownership of beneficial interests in such Global Security.
 
Governing Law
 
      The Indenture and the Subordinated Debentures will be governed by, and
construed in accordance with, the internal laws of the State of New York.
 
Miscellaneous
 
      Motorola will pay all fees and expenses related to (i) the offering of
the Trust Securities and the Subordinated Debentures, (ii) the organization,
maintenance and dissolution of the Trust, (iii) the retention of the Trustees
and (iv) the enforcement by the Property Trustee of the rights of the holders
of the Preferred Securities.
 
                                       44
<PAGE>
 
                       DESCRIPTION OF THE TRUST GUARANTEE
 
      Set forth below is a summary of the material terms of the Trust Guarantee
that will be executed and delivered by Motorola for the benefit of the holders
of Preferred Securities. The Trust Guarantee will be qualified as an indenture
under the Trust Indenture Act. Harris will act as independent indenture trustee
for Trust Indenture Act purposes under the Trust Guarantee. The terms of the
Trust Guarantee will be those set forth in the Trust Guarantee itself and those
made part of such Trust Guarantee by the Trust Indenture Act. The following
summary does not purport to be complete and is subject to and qualified in its
entirety by reference to the provisions of the Trust Guarantee, a copy of which
has been filed as an exhibit to the Registration Statement of which this
prospectus forms a part, and the Trust Indenture Act. The Trust Guarantee will
be held by the Guarantee Trustee for the benefit of the holders of the
Preferred Securities.
 
General
 
      Pursuant to the Trust Guarantee, Motorola will agree, to the extent set
forth therein, to pay in full to the holders of the Preferred Securities, the
Guarantee Payments (as defined below) (except to the extent paid by the Trust),
as and when due, regardless of any defense, right of set-off or counterclaim
which the Trust may have or assert. The following payments or distributions
with respect to the Preferred Securities (the "Guarantee Payments"), to the
extent not paid by the Trust, will be subject to the Trust Guarantee (without
duplication): (i) any accrued and unpaid distributions that are required to be
paid on such Preferred Securities, to the extent the Trust shall have funds
available therefor, (ii) the Redemption Price, to the extent the Trust has
funds available therefor, with respect to any Preferred Securities called for
redemption by the Trust and (iii) upon a voluntary or involuntary dissolution,
winding-up or termination of the Trust (other than in connection with a
distribution of the Subordinated Debentures to the holders of Preferred
Securities or the redemption of all of the Preferred Securities upon maturity
or redemption of the Subordinated Debentures) the lesser of (a) the aggregate
of the liquidation amount and all accrued and unpaid distributions on such
Preferred Securities to the date of payment, to the extent the Trust has funds
available therefor or (b) the amount of assets of the Trust remaining for
distribution to holders of such Preferred Securities in liquidation of the
Trust. Motorola's obligation to make a Guarantee Payment may be satisfied by
direct payment of the required amounts by Motorola to the holders of Preferred
Securities or by causing the Trust to pay such amounts to such holders.
 
      The Trust Guarantee will not apply to any payment of distributions except
to the extent the Trust shall have funds available therefor. If Motorola does
not make interest or principal payments on the Subordinated Debentures, the
Trust will not pay distributions on the Preferred Securities issued by the
Trust and will not have funds available therefor. As a result, holders of
Preferred Securities will not be able to rely upon the Trust Guarantee for
payment of these amounts. Instead, holders of Preferred Securities or the
Property Trustee may enforce the rights of the Trust under the Subordinated
Debentures directly against Motorola.
 
Certain Covenants of Motorola
 
      In the Trust Guarantee, Motorola will covenant that, so long as any
Preferred Securities issued by the Trust remain outstanding, if there shall
have occurred any event of default under the Trust Guarantee or under the
Declaration, then Motorola may not (a) declare or pay dividends on, make
distributions with respect to, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of its capital stock, (b) make any
payment of interest, principal or premium, if any, on or repay, repurchase or
redeem any debt securities issued by Motorola that rank equal with or junior to
the Subordinated Debentures or (c) make any guarantee payments with respect to
the foregoing (other than pursuant to the Trust Guarantee); provided, however,
that the restriction in clause (a) does not apply to (i) purchases or
acquisitions of Motorola's capital stock in connection with the satisfaction of
its obligations under any employee benefit plans, stock option plans, employee
stock purchase plans or direct reinvestment plans as may be in effect from time
to time or the satisfaction of its obligations pursuant to any contract or
security outstanding on the date of such event requiring Motorola to purchase
its capital stock (other than a contractual obligation ranking equal with or
junior to the Subordinated Debentures),
 
                                       45
<PAGE>
 
(ii) reclassifications of Motorola's capital stock or the exchange or
conversion of one class or series of Motorola's capital stock for another class
or series of Motorola's capital stock, provided that such reclassification,
exchange or conversion does not result in a change in the priority vis-a-vis
the Preferred Securities of any class or series of capital stock that is being
so reclassified or that is the subject of such exchange or conversion, (iii)
purchases of fractional interests in shares of Motorola's capital stock
pursuant to the conversion or exchange provisions of such capital stock or the
security being converted or exchanged, (iv) stock dividends paid by Motorola
where the dividend stock is the same stock as that on which the dividend is
being paid or (v) redemptions or purchases of any rights pursuant to purchase
rights contained in any rights agreement as shall be in effect from time to
time, which purchase rights are substantially similar to those contained in
Motorola's current rights agreement.
 
Modification of the Trust Guarantee; Assignment
 
      Except with respect to any changes that do not adversely affect the
rights of holders of Preferred Securities (in which case no consent of such
holders will be required), the Trust Guarantee may be amended only with the
prior approval of the holders of not less than a majority in liquidation amount
of the outstanding Preferred Securities. All guarantees and agreements
contained in the Trust Guarantee shall bind the successors, assigns, receivers,
trustees and representatives of Motorola and shall inure to the benefit of the
holders of the Preferred Securities then outstanding.
 
Events of Default
 
      An event of default under the Trust Guarantee will occur upon the failure
of Motorola to perform any of its payment or other obligations thereunder. The
holders of a majority in liquidation amount of the outstanding 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
the Trust Guarantee or to direct the exercise of any trust or power conferred
upon the Guarantee Trustee under the Trust Guarantee.
 
      If the Guarantee Trustee fails to enforce the Trust Guarantee to the
fullest extent permitted by law, any holder of Preferred Securities may
institute a legal proceeding directly against Motorola to enforce the Guarantee
Trustee's rights under the Trust Guarantee without first instituting a legal
proceeding against the Trust, the Guarantee Trustee or any other person or
entity. Notwithstanding the foregoing, if Motorola has failed to make a
Guarantee Payment under the Trust Guarantee, a holder of Preferred Securities
may directly institute a proceeding against Motorola for enforcement of the
Trust Guarantee for such payment to the holder of the Preferred Securities of
the principal of or interest on the Subordinated Debentures on or after the
respective due dates specified in the Subordinated Debentures, and the amount
of the payment will be based on such holder's pro rata share of the amounts due
and owing on all of the Preferred Securities. Motorola has waived any right or
remedy to require that any action be brought first against the Trust or any
other person or entity before proceeding directly against Motorola.
 
      The rights of the holders of Preferred Securities and the Guarantee
Trustee upon the occurrence of an event of default under the Trust Guarantee
are subject to the subordination provisions of the Trust Guarantee, as
described under "--Status of the Trust Guarantee," below.
 
      Motorola will be required to provide annually to the Guarantee Trustee a
statement as to the performance by Motorola of certain of its obligations under
the Trust Guarantee and as to any default in such performance.
 
Information Concerning the Guarantee Trustee
 
      The Guarantee Trustee, prior to the occurrence of an event of default
with respect to the Trust Guarantee, undertakes to perform only such duties as
are specifically set forth in the Trust Guarantee and, after an event of
default with respect to the Trust Guarantee, shall exercise the same degree of
care as a prudent individual would exercise in the conduct of his or her own
affairs. Subject to such provision, the Guarantee Trustee is under no
obligation to exercise any of the powers vested in it by the Trust
 
                                       46
<PAGE>
 
Guarantee at the request of any holder of Preferred Securities unless it is
offered reasonable indemnity against the costs, expenses and liabilities that
might be incurred thereby.
 
Termination
 
      The Trust Guarantee will terminate as to the Preferred Securities issued
by the Trust upon (i) full payment of the Redemption Price of all Preferred
Securities, (ii) distribution of the Subordinated Debentures to the holders of
all of the Preferred Securities or (iii) full payment of the amounts payable in
accordance with the Declaration upon liquidation of the Trust. Notwithstanding
the foregoing, the Trust Guarantee will continue to be effective or will be
reinstated, as the case may be, if at any time any holder of Preferred
Securities issued by the Trust must restore payment of any sums paid under the
Preferred Securities or the Trust Guarantee.
 
Status of the Trust Guarantee
 
      The Trust Guarantee will constitute an unsecured obligation of Motorola
and will rank (i) subordinate and junior in right of payment to all other
liabilities of Motorola, including all series of Motorola's outstanding
LYONs(TM), except those made equal or subordinate by their terms, (ii) equal
with the most senior preferred or preference stock now or hereafter issued by
Motorola and with any guarantee now or hereafter entered into by Motorola in
respect of any preferred or preference stock of any affiliate of Motorola,
(iii) senior to Motorola's Common Stock and (iv) effectively subordinated to
the liabilities and obligations of Motorola's subsidiaries to the same extent
as the Subordinated Debentures, as described below. The terms of the Preferred
Securities provide that each holder of Preferred Securities by acceptance
thereof agrees to the subordination provisions and other terms of the Trust
Guarantee.
 
      The Trust Guarantee will constitute a guarantee of payment and not of
collection (that is, the guaranteed party may institute a legal proceeding
directly against Motorola to enforce its rights under such Trust Guarantee
without instituting a legal proceeding against any other person or entity).
 
      The Indenture does not limit the amount of additional indebtedness
Motorola or any of its subsidiaries may incur. The Subordinated Debentures and
the Trust Guarantee will be obligations exclusively of Motorola. Since the
operations of Motorola are partially conducted through subsidiaries, its cash
flow and consequent ability to service debt and satisfy its other obligations,
including those under the Trust Guarantee, are partially dependent upon the
earnings of its subsidiaries. The subsidiaries are separate and distinct legal
entities and have no obligation, contingent or otherwise, to pay any amounts
due pursuant to the Subordinated Debentures or the Trust Guarantee or to make
funds available therefor, whether by dividends, loans or other payments. In
addition, the payment of dividends and the making of loans and advances to
Motorola by its subsidiaries may be subject to statutory or contractual
restrictions, are contingent upon the earnings of those subsidiaries, and are
subject to various business considerations.
 
      Any right of Motorola to receive assets of any of its subsidiaries upon
their liquidation or reorganization (and the consequent right of the holder(s)
of the Subordinated Debentures or a party seeking to enforce the Trust
Guarantee to participate in those assets) will be effectively subordinated to
the claims of that subsidiary's creditors (including trade creditors), except
to the extent that Motorola is itself recognized as a creditor of such
subsidiary, in which case the claims of Motorola would be subordinate to any
security interests in the assets of such subsidiary and any indebtedness of
such subsidiary senior to that held by Motorola. As of December 31, 1998,
Motorola's subsidiaries had outstanding approximately $4.0 billion of
liabilities.
 
Governing Law
 
      The Trust Guarantee will be governed by, and construed in accordance
with, the internal laws of the State of New York.
 
                                       47
<PAGE>
 
                  EFFECT OF OBLIGATIONS UNDER THE SUBORDINATED
                       DEBENTURES AND THE TRUST GUARANTEE
 
      As set forth in the Declaration, the sole purpose of the Trust is to (i)
issue the Trust Securities evidencing undivided beneficial interests in the
assets of the Trust, (ii) invest the proceeds from such issuance and sale in
the Subordinated Debentures and (iii) engage in only those other activities
necessary or incidental thereto.
 
      As long as payments of interest and other payments are made when due on
the Subordinated Debentures, such payments will be sufficient to cover
distributions and payments due on the Trust Securities because: (i) the
aggregate principal amount of Subordinated Debentures will be equal to the sum
of the aggregate stated liquidation amount of the Trust Securities; (ii) the
interest rate and the interest and other payment dates on the Subordinated
Debentures will match the distribution rate and distribution and other payment
dates for the Preferred Securities; (iii) Motorola shall pay all, and the Trust
shall not be obligated to pay, directly or indirectly, any, costs, expenses,
debts and obligations (other than with respect to the Trust Securities) related
to the Trust; and (iv) the Declaration provides that the Trustees shall not
cause or permit the Trust to, among other things, engage in any activity that
is not consistent with the purposes of the Trust.
 
      Payments of distributions (to the extent funds therefor are available)
and other payments due on the Preferred Securities (to the extent funds
therefor are available) are guaranteed by Motorola as and to the extent set
forth above under "Description of the Trust Guarantee." If Motorola does not
make interest and/or principal payments on the Subordinated Debentures
purchased by the Trust, the Trust will not have sufficient funds to pay
distributions on the Preferred Securities. The Trust Guarantee will not apply
to the payment of distributions and other payments on the Preferred Securities
when the Trust does not have sufficient funds to make such distributions or
other payments. As a result, holders of Preferred Securities will not be able
to rely upon the Trust Guarantee for payment of these amounts. Instead, holders
of Preferred Securities or the Property Trustee may enforce the rights of the
Trust under the Subordinated Debentures directly against Motorola.
 
      The Trust Guarantee will constitute an unsecured obligation of Motorola
and will rank (i) subordinate and junior in right of payment to all other
liabilities of Motorola, including all series of Motorola's outstanding
LYONs(TM), except those made equal or subordinate by their terms, (ii) equal
with the most senior preferred or preference stock now or hereafter issued by
Motorola and with any guarantee now or hereafter entered into by Motorola in
respect of any preferred or preference stock of any affiliate of Motorola,
(iii) senior to Motorola's Common Stock and (iv) effectively subordinated to
the liabilities and obligations of Motorola's subsidiaries to the same extent
as the Subordinated Debentures, as described below.
 
      The Indenture does not limit the amount of additional indebtedness
Motorola or any of its subsidiaries may incur. The Subordinated Debentures and
the Trust Guarantee will be obligations exclusively of Motorola. Since the
operations of Motorola are partially conducted through subsidiaries its cash
flow and consequent ability to service debt, including the Subordinated
Debentures, and to satisfy its other obligations, including those under the
Trust Guarantee, are partially dependent upon the earnings of its subsidiaries.
The subsidiaries are separate and distinct legal entities and have no
obligation, contingent or otherwise, to pay any amounts due pursuant to the
Subordinated Debentures or the Trust Guarantee or to make funds available
therefor, whether by dividends, loans or other payments. In addition, the
payment of dividends and the making of loans and advances to Motorola by its
subsidiaries may be subject to statutory or contractual restrictions, are
contingent upon the earnings of those subsidiaries, and are subject to various
business considerations.
 
      Any right of Motorola to receive assets of any of its subsidiaries upon
their liquidation or reorganization (and the right of the holder(s) of the
Subordinated Debentures or a party seeking to enforce the Trust Guarantee to
participate in those assets) will be effectively subordinated to the claims of
that subsidiary's creditors (including trade creditors), except to the extent
that Motorola is itself
 
                                       48
<PAGE>
 
recognized as a creditor of such subsidiary, in which case the claims of
Motorola would be subordinate to any security interests in the assets of such
subsidiary and any indebtedness of such subsidiary senior to that held by
Motorola. As of December 31, 1998, Motorola's subsidiaries had outstanding
approximately $4.0 billion of liabilities.
 
      The Trust Guarantee, when taken together with the back-up undertakings,
consisting of obligations of Motorola as set forth in the Declaration
(including the obligation to pay expenses of the Trust), the Indenture and any
applicable supplemental indentures thereto, and the Subordinated Debentures
issued to the Trust, provide a full and unconditional guarantee by Motorola of
the amounts due on the Preferred Securities. If Motorola fails to make interest
or other payments on the Subordinated Debentures when due (taking into account
any Extension Period), the Declaration provides a mechanism whereby the holders
of the Preferred Securities, using the procedures described in "Description of
the Preferred Securities--Book-Entry Issuance--The Depository Trust Company"
and "Description of the Preferred Securities--Voting Rights," may direct the
Property Trustee to enforce its rights under the Subordinated Debentures. If
the Property Trustee fails to enforce its rights under the Subordinated
Debentures to the fullest extent permitted by law, any holder of Preferred
Securities may institute a legal proceeding against Motorola to enforce the
Property Trustee's rights under the Subordinated Debentures without first
instituting any legal proceeding against the Property Trustee or any other
person or entity. Notwithstanding the foregoing, if a Declaration Event of
Default has occurred and is continuing and such event is attributable to the
failure of Motorola to pay interest or principal on the Subordinated Debentures
on the date such interest or principal is otherwise payable (taking into
account any Extension Periods), then any holder of Preferred Securities may
directly institute a legal proceeding against Motorola for payment of its pro
rata share of principal and interest. Motorola, under the Trust Guarantee,
acknowledges that the Guarantee Trustee shall enforce the Trust Guarantee on
behalf of the holders of the Preferred Securities. If Motorola fails to make
payments under the Trust Guarantee, the Trust Guarantee provides a mechanism
whereby the holders of the Preferred Securities may direct the Guarantee
Trustee to enforce its rights thereunder. Notwithstanding the foregoing, if
Motorola has failed to make a payment under the Trust Guarantee, any holder of
Preferred Securities may institute a legal proceeding directly against Motorola
for enforcement of the Trust Guarantee with respect to payment to the record
holder of the Preferred Securities of the principal or interest on the
Subordinated Debentures held by the Trust on or after the respective due dates
specified in the Subordinated Debentures (taking into account any Extension
Periods), without first instituting a legal proceeding against the Trust, the
Guarantee Trustee, or any other person or entity.
 
                                       49
<PAGE>
 
                     UNITED STATES FEDERAL INCOME TAXATION
 
General
 
      This general summary is based on the Internal Revenue Code of 1986, as
amended (the "Code"), Treasury regulations thereunder, and administrative and
judicial interpretations thereof, each as of the date hereof, all of which are
subject to change, possibly on a retroactive basis. The authorities on which
this general summary is based are subject to various interpretations, and the
opinions expressed herein are not binding on the IRS or the courts, either of
which could take a contrary position. Moreover, no rulings have been or will be
sought from the IRS with respect to the transactions described herein.
Accordingly, there can be no assurance that the IRS will not challenge the
opinions expressed herein or that a court would not sustain such a challenge.
 
      Except as otherwise stated, this general summary deals only with
Preferred Securities held as a capital asset (within the meaning of section
1221 of the Code) by a holder who or which (i) purchased the Preferred
Securities upon original issuance at their original offering price and (ii) is
a US Holder (as defined below). This summary does not address all the tax
consequences that may be relevant to a US Holder, nor does it address the tax
consequences, except as stated below, to holders that are not US Holders ("Non-
US Holders") or to holders that may be subject to special tax treatment (such
as banks, thrift institutions, real estate investment trusts, regulated
investment companies, insurance companies, brokers and dealers in securities or
currencies, other financial institutions, tax-exempt organizations, persons
holding the Preferred Securities as a position in a "straddle," or as part of a
"synthetic security," "hedging," as part of a "conversion" transaction or other
integrated investment, persons having a functional currency other than the U.S.
Dollar, and certain United States expatriates). Further, this summary does not
address (a) the income tax consequences to shareholders in, or partners or
beneficiaries of, a holder of the Preferred Securities, (b) the United States
federal alternative minimum tax consequences of the purchase, ownership or
disposition of the Preferred Securities, or (c) any state, local or foreign tax
consequences of the purchase, ownership and disposition of Preferred
Securities.
 
      A "US Holder" is a holder of the Preferred Securities who or which is (i)
a citizen or individual resident (or is treated as a citizen or individual
resident under the Code) of the United States for income tax purposes, (ii) a
corporation or partnership created or organized (or treated as created or
organized for federal income tax purposes) in or under the laws of the United
States or any political subdivision thereof (other than any such partnership
treated as foreign under U.S. Treasury regulations which may be issued under a
recently enacted amendment to the Code), (iii) an estate the income of which is
includible in its gross income for United States federal income tax purposes
without regard to its source, or (iv) a trust if (a) a court within the United
States is able to exercise primary supervision over the administration of the
trust and (b) one or more United States persons have the authority to control
all substantial decisions of the trust.
 
      PROSPECTIVE INVESTORS SHOULD CONSULT THEIR OWN TAX ADVISORS WITH RESPECT
TO THE TAX CONSEQUENCES TO THEM OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF
THE PREFERRED SECURITIES, INCLUDING THE TAX CONSEQUENCES UNDER STATE, LOCAL,
FOREIGN AND OTHER TAX LAWS AND THE POSSIBLE EFFECTS OF CHANGES IN UNITED STATES
FEDERAL OR OTHER TAX LAWS.
 
Classification of the Subordinated Debentures
 
      In the opinion of Kirkland & Ellis, legal counsel for Motorola and the
Trust, the Subordinated Debentures will be classified for United States federal
income tax purposes as indebtedness of Motorola under current law. By
acceptance of Preferred Securities, each holder covenants to treat the
Subordinated Debentures as indebtedness and the Preferred Securities as
evidence of an indirect beneficial ownership interest in the Subordinated
Debentures. No assurance can be given, however, that the classification of the
Subordinated Debentures as debt will not be challenged by the IRS or, if
challenged, that such a
 
                                       50
<PAGE>
 
challenge will not be successful. A successful IRS challenge to the
classification of the Subordinated Debentures as debt would prevent Motorola
from deducting the interest paid or accrued on the Subordinated Debentures for
United States federal income tax purposes and could constitute a Tax Event.
Additionally, if the interest on the Subordinated Debentures is not deductible
it could adversely affect Motorola's ability to make payments on the
Subordinated Debentures. The remainder of this discussion assumes that the
Subordinated Debentures will be classified as indebtedness of Motorola for
United States federal income tax purposes.
 
Classification of the Trust
 
      In the opinion of Kirkland & Ellis, legal counsel for Motorola and the
Trust, the Trust will be classified for United States federal income tax
purposes as a grantor trust and not as an association taxable as a corporation
under current law and assuming full compliance with the terms of the
Declaration. Accordingly, for United States federal income tax purposes, each
holder of Preferred Securities generally will be considered the owner of an
undivided interest in the Subordinated Debentures and each US Holder will be
required to include in gross income all interest on (including OID accrued, if
any) or gain recognized for United States federal income tax purposes with
respect to its allocable share of the Subordinated Debentures.
 
US Holders
 
Interest Income and Original Issue Discount
 
      Under applicable Treasury regulations (the "Regulations"), remote
contingencies that stated interest will not be timely paid are ignored in
determining whether a debt instrument is issued with OID. If the Subordinated
Debentures are treated as issued with OID, such OID must be included in income
by all holders as it accrues economically on a daily basis, without regard to
when it is paid in cash or whether a particular holder generally uses the cash
method of accounting. Motorola has concluded that the likelihood of its
exercising its option to defer payments of interest is remote. This conclusion
is based on Motorola's analysis, as of the date of issue of the Subordinated
Debentures, of various facts and circumstances deemed relevant to exercising
such deferral option, including, among other things, the inability of Motorola
(a) to declare or pay a dividend, or engage in certain other capital
transactions, with respect to its capital stock, or (b) to make any payment of
principal of or interest or premium, if any, on, or repay, repurchase or
redeem, any debt of Motorola that ranks equal with or junior to the
Subordinated Debentures if the deferral option is exercised. Based upon this
conclusion and in the absence of any specific definition of "remote" in the
applicable Regulations, in the opinion of Kirkland & Ellis, although the matter
is not entirely free from doubt, the Subordinated Debentures will not be
subject to the OID rules unless Motorola exercises its option to extend the
interest payment period. As a consequence, holders of the Preferred Securities
should report interest under their own methods of accounting (e.g., cash or
accrual) instead of under the daily economic accrual rules for OID instruments.
 
      Under the Regulations, if Motorola exercises its option to defer payments
of interest, the Subordinated Debentures would be treated as redeemed and
reissued for OID purposes and the sum of the remaining interest payments on the
Subordinated Debentures would thereafter be treated as OID, which would accrue,
and be includible in a US Holder's taxable income, on an economic accrual basis
(regardless of the US Holder's method of accounting for income tax purposes)
over the remaining term of the Subordinated Debentures (including any period of
interest deferral), without regard to the timing of payments under the
Subordinated Debentures.
 
      The IRS could take the position that the likelihood that Motorola would
exercise its right to defer payments of interest is not a "remote" contingency
for purposes of the OID rules, in which case, the Subordinated Debentures would
be treated as initially issued with OID in an amount equal to the aggregate
stated interest over the term of the Subordinated Debentures. That OID would
generally be includible in a US Holder's taxable income, over the term of the
Subordinated Debentures, on an economic accrual basis.
 
                                       51
<PAGE>
 
Characterization of Income
 
      Because the income underlying the Preferred Securities will not be
classified as dividends for income tax purposes, corporate US Holders of
Preferred Securities will not be entitled to a dividends-received deduction for
any income recognized with respect to the Preferred Securities.
 
Sales of Preferred Securities
 
      A US Holder that sells Preferred Securities will recognize gain or loss
equal to the difference between the amount realized on the sale of the
Preferred Securities and such holder's adjusted tax basis in such Preferred
Securities. To the extent of any accrued but unpaid interest, the amount
realized on the sale of such Preferred Securities will be treated as ordinary
income. Assuming Motorola does not defer interest on the Subordinated
Debentures by extending the interest payment period, a US Holder's "adjusted
tax basis" in the Preferred Securities generally will equal its initial
purchase price. If Motorola elects to defer interest payments, a US Holder's
adjusted tax basis in the Preferred Securities generally will be its initial
purchase price increased by any OID previously included in such holder's gross
income to the date of disposition and decreased by payments received on the
Preferred Securities after Motorola exercises its option to extend the current
interest payment period and prior to the date of disposition. Any gain or loss
recognized generally will be a capital gain or loss. The highest marginal
individual federal income tax rate (which applies to ordinary income and gain
from sales or exchanges of capital assets held for one year or less) is 39.6%.
The maximum regular federal income tax rate on capital gains derived by
individual taxpayers is 20% for sales and exchanges of capital assets held for
more than one year. All net capital gain of a corporate taxpayer is subject to
tax at ordinary corporate income tax rates of up to 35%.
 
      The Preferred Securities may trade at a price that does not accurately
reflect the value of accrued but unpaid interest with respect to the underlying
Subordinated Debentures. A holder who disposes of Preferred Securities between
record dates for payments of distributions thereon will be required to include
in income (to the extent not previously included in income) as ordinary income
amounts attributable to accrued and unpaid interest on the Subordinated
Debentures through the date of disposition and the amount realized on
disposition excludes the portion of the sales price treated as interest. To the
extent the selling price is less than the holder's adjusted tax basis, a holder
will recognize a capital loss. Subject to certain limited exceptions, capital
losses cannot be applied to offset ordinary income for United States federal
income tax purposes.
 
      If Motorola elects to defer payments of interest, the market value of the
Preferred Securities will likely fall. Furthermore, the market value of the
Preferred Securities may not reflect the accumulated distribution that will be
paid at the end of the Extension Period. A US Holder who disposes of Preferred
Securities during an Extension Period will be required to include as ordinary
income the accrued OID on the Subordinated Debentures through the date of
disposition as ordinary income and add such amount to the US Holder's adjusted
basis in the pro rata share of Preferred Securities disposed of. To the extent
the selling price is less than the US Holder's adjusted tax basis, the US
Holder will recognize capital loss. Subject to certain limited exceptions,
capital losses cannot be applied to offset ordinary income for United States
federal income tax purposes.
 
Receipt of Subordinated Debentures or Cash Upon Liquidation of the Trust
 
      Under certain circumstances described herein (see "Description of the
Preferred Securities--Distribution of the Subordinated Debentures"), the Trust
may distribute the Subordinated Debentures to holders in exchange for the
Preferred Securities and in liquidation of the Trust. Except as discussed
below, such a distribution would not be a taxable event for United States
federal income tax purposes, and each US Holder would have an aggregate
adjusted basis in its Subordinated Debentures for United States federal income
tax purposes equal to such holder's aggregate adjusted basis in its Preferred
Securities. (For a description of adjusted basis in the Preferred Securities,
see discussion above in "--Sales of Preferred Securities.") For United States
federal income tax purposes, a US Holder's
 
                                       52
<PAGE>
 
holding period in the Subordinated Debentures received in such a liquidation of
the Trust would include the period during which the Preferred Securities were
held by the holder.
 
      Under certain circumstances described herein (see "Description of the
Preferred Securities" and "Description of the Subordinated Debentures"), the
Subordinated Debentures may be redeemed for cash and the proceeds of such
redemption distributed to holders in redemption of their Preferred Securities.
Such a redemption would be taxable for United States federal income tax
purposes, and a US Holder would recognize gain or loss as if it had sold the
Preferred Securities for cash. See "--Sales of Preferred Securities" above.
 
Potential Tax Law Changes
 
      From time to time, certain tax law changes have been proposed that would
deny interest deductions to corporate issuers of debt instruments with terms
that include certain of the terms of the Subordinated Debentures. In addition,
the IRS has challenged taxpayers' treatment as indebtedness of securities
issued with characteristics similar to the Subordinated Debentures. To date,
such tax law change proposals have not been enacted and the only known
challenge that has advanced as far as litigation was settled short of trial,
with a resolution favorable to the taxpayer's position. However, if any similar
tax law change were enacted or any such challenge by the IRS were upheld, such
event could give rise to a Tax Event which could result in an early redemption
of the Preferred Securities. See "Description of the Preferred Securities--
Special Event Redemption."
 
Non-US Holders
 
      Payments to a Non-US holder will generally not be subject to withholding
of income tax, provided that such holder of the Preferred Securities (a) does
not (directly or indirectly, actually or constructively) own 10% or more of the
total combined voting power of all classes of stock of the Company entitled to
vote, (b) is not a controlled foreign corporation that is related to the
Company through stock ownership and (c) is not a bank receiving interest
described in section 881(c)(3)(A) of the Code. To qualify for this exemption
from withholding taxation, the last United States payor in the chain of payment
prior to payment to a Non-US Holder (the "Withholding Agent") must have
received in the year in which a payment of interest or principal occurs prior
to such payment, or in either of the two preceding calendar years, a statement
that (a) is signed by the holder of the Preferred Securities under penalties of
perjury, (b) certifies that such holder is not a US Holder and (c) provides the
name and address of the holder. The statement may be made on an IRS Form W-8 or
a substantially similar form, and the holder must inform the Withholding Agent
of any change in the information on the statement within 30 days of such
change. If the Preferred Securities are held through a securities clearing
organization or certain other financial institutions, the organization or
institution may provide a signed statement to the Withholding Agent. However,
in such case, the signed statement must be accompanied by a copy of the IRS
Form W-8 or the substitute form provided by the holder to the organization or
institution.
 
      As discussed above (see "--Potential Tax Law Changes"), changes in
legislation, if any, affecting the income tax consequences of the Subordinated
Debentures could adversely affect the ability of Motorola to deduct the
interest payable on the Subordinated Debentures. Moreover, any such legislation
could adversely affect Non-US Holders by characterizing income derived from the
Subordinated Debentures as dividends, generally subject to a 30% income tax (on
a withholding basis) when paid to a Non-US Holder, rather than as interest
which, as discussed above, is generally exempt from income tax in the hands of
a Non-US Holder.
 
      A Non-US Holder of a Preferred Security will generally not be subject to
withholding of income tax on any gain realized upon the sale or other
disposition of Preferred Securities.
 
                                       53
<PAGE>
 
      A Non-US Holder that holds Preferred Securities in connection with the
active conduct of a United States trade or business will be subject to income
tax on all income and gains recognized with respect to its proportionate share
of the Subordinated Debentures.
 
Backup Withholding
 
      Backup withholding of United States federal income tax at a rate of 31%
may apply to payments made in respect of the Preferred Securities to registered
owners who are not "exempt recipients" and who fail to provide certain
identifying information (such as the registered owner's taxpayer identification
number) in the required manner. Generally, individuals are not exempt
recipients, whereas corporations and certain other entities generally are
exempt recipients. Payments made in respect of the Preferred Securities to a US
Holder must be reported to the IRS, unless the US Holder is an exempt recipient
or establishes an exemption. Compliance with the identification procedures
described in the preceding section would establish an exemption from backup
withholding for those Non-US Holders who are not exempt recipients.
 
      In addition, upon the sale of the Preferred Securities to (or through) a
broker, the broker must withhold 31% of the entire purchase price, unless
either (i) the broker determines that the seller is a corporation or other
exempt recipient or (ii) the seller provides, in the required manner, certain
identifying information and, in the case of a Non-US Holder, certifies that
such seller is a Non-US Holder (and certain other conditions are met). Such a
sale must also be reported by the broker to the IRS, unless either (i) the
broker determines that the seller is an exempt recipient or (ii) the seller
certifies its Non-U.S. status (and certain other conditions are met).
Certification of the registered owner's Non-U.S. status would be made normally
on an IRS Form W-8 under penalties of perjury, although in certain cases it may
be possible to submit other documentary evidence.
 
Final Withholding Regulations
 
      Recently promulgated Treasury regulations (the "Final Regulations"),
effective for payments made after December 31, 1999, provide alternative
methods for satisfying the certification requirements described above under
"Non-US Holders" and "Backup Withholding." The Final Regulations also will
require, in the case of Preferred Securities held by foreign partnerships, that
(i) the certification described above be provided by the partners rather than
the foreign partnership (unless the foreign partnership agrees to become a
"withholding foreign partnership") and (ii) the partnership provides certain
information, including a US taxpayer identification number. A look-through rule
will apply in the case of tiered partnerships. Prospective investors are urged
to consult their own tax advisors regarding the Final Regulations.
 
      THE UNITED STATES FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS
INCLUDED FOR GENERAL INFORMATION ONLY AND MAY NOT BE APPLICABLE DEPENDING UPON
A HOLDER'S PARTICULAR SITUATION. HOLDERS SHOULD CONSULT THEIR TAX ADVISORS WITH
RESPECT TO THE TAX CONSEQUENCES TO THEM OF THE PURCHASE, OWNERSHIP AND
DISPOSITION OF THE PREFERRED SECURITIES, INCLUDING THE TAX CONSEQUENCES UNDER
STATE, LOCAL, FOREIGN AND OTHER TAX LAWS AND THE POSSIBLE EFFECTS OF CHANGES IN
UNITED STATES FEDERAL OR OTHER TAX LAWS.
 
                                       54
<PAGE>
 
                                  UNDERWRITING
 
      Subject to the terms and conditions set forth in the underwriting
agreement (the "Underwriting Agreement") among Motorola, the Trust and each of
the underwriters named below (collectively, the "Underwriters"), the Trust has
agreed to sell to each of the Underwriters named herein, and each of the
Underwriters for whom Merrill Lynch, Pierce, Fenner & Smith Incorporated, A.G.
Edwards & Sons, Inc., Goldman, Sachs & Co., Morgan Stanley & Co. Incorporated,
PaineWebber Incorporated, Prudential Securities Incorporated and Salomon Smith
Barney Inc. are acting as representatives (the "Representatives"), has
severally agreed to purchase from the Trust, the respective number of Preferred
Securities set forth below opposite its name. In the Underwriting Agreement,
the several Underwriters have agreed, subject to the terms and conditions set
forth therein, to purchase all of the Preferred Securities offered hereby if
any of the Preferred Securities are purchased. In the event of default by an
Underwriter, the Underwriting Agreement provides that, in certain
circumstances, the purchase commitments of the nondefaulting Underwriters may
be increased or the Underwriting Agreement may be terminated.
 
<TABLE>
<CAPTION>
                                                                    Number of
                                                                    Preferred
      Underwriter                                                   Securities
      -----------                                                   ----------
      <S>                                                           <C>
      Merrill Lynch, Pierce, Fenner & Smith
               Incorporated........................................  2,700,000
      A.G. Edwards & Sons, Inc.....................................  2,450,000
      Goldman, Sachs & Co..........................................  2,450,000
      Morgan Stanley & Co. Incorporated............................  2,450,000
      PaineWebber Incorporated.....................................  2,450,000
      Prudential Securities Incorporated...........................  2,450,000
      Salomon Smith Barney Inc.....................................  2,450,000
      ABN AMRO Incorporated........................................    100,000
      BT Alex. Brown Incorporated..................................    100,000
      Robert W. Baird & Co. Incorporated...........................    100,000
      Bear, Stearns & Co. Inc......................................    100,000
      CIBC Oppenheimer Corp........................................    100,000
      Dain Rauscher Incorporated...................................    100,000
      Deutsche Bank Securities Inc.................................    100,000
      Donaldson, Lufkin & Jenrette Securities Corporation..........    100,000
      EVEREN Securities, Inc.......................................    100,000
      Fahnestock & Co. Inc.........................................    100,000
      Fleet Securities, Inc........................................    100,000
      Legg Mason Wood Walker, Incorporated.........................    100,000
      McDonald Investments Inc., a KeyCorp Company.................    100,000
      Morgan Keegan & Company, Inc.................................    100,000
      NationsBanc Montgomery Securities LLC........................    100,000
      OLDE Discount Corporation....................................    100,000
      Piper Jaffray Inc............................................    100,000
      Raymond James & Associates, Inc. ............................    100,000
      Roney Capital Markets, A Division of First Chicago Capital
       Markets, Inc................................................    100,000
      SG Cowen Securities Corporation..............................    100,000
      Stone & Youngberg............................................    100,000
      TD Securities (USA) Inc......................................    100,000
      Tucker Anthony Incorporated..................................    100,000
      Utendahl Capital Partners, L.P...............................    100,000
      Warburg Dillon Read LLC......................................    100,000
      Wheat First Securities, Inc. ................................    100,000
                                                                    ----------
           Total................................................... 20,000,000
                                                                    ==========
</TABLE>
 
                                       55
<PAGE>
 
      The Underwriters propose initially to offer the Preferred Securities to
the public at the public offering price set forth on the cover page of this
prospectus, and to certain dealers at such price less a concession not in
excess of $.50 per Preferred Security. The Underwriters may allow, and such
dealers may reallow, a discount not in excess of $.30 per Preferred Security to
certain other dealers. After the initial public offering, the public offering
price, concession and discount may be changed.
 
      In view of the fact that the proceeds of the sale of the Preferred
Securities will be used by the Trust to purchase the Subordinated Debentures of
Motorola, the Underwriting Agreement provides that Motorola will pay as
compensation ("Underwriters' Compensation") to the Underwriters arranging the
investment therein of such proceeds, an amount of $.7875 per Preferred Security
(or $15,750,000 in the aggregate) for the accounts of the several Underwriters.
 
      During a period of 30 days from the date of this prospectus, neither the
Trust nor the Company will, without the prior written consent of Merrill Lynch,
Pierce, Fenner & Smith Incorporated on behalf of the Underwriters, directly or
indirectly, sell, offer to sell, grant any option for the sale of, or otherwise
dispose of, any Preferred Securities, Subordinated Debentures or Trust
Guarantee, any security convertible into or exchangeable into or exercisable
for any of such securities or any securities substantially similar to any of
such securities (except for the Preferred Securities, Subordinated Debentures
and Trust Guarantee offered hereby).
 
      Prior to this offering, there has been no public market for the Preferred
Securities. The Preferred Securities have been approved for listing on the
NYSE, subject to official notice of issuance. Trading of the Preferred
Securities on the NYSE is expected to commence within a 30-day period after the
initial delivery of the Preferred Securities. The Representatives have advised
the Trust that they intend to make a market in the Preferred Securities prior
to the commencement of trading on the NYSE. The Representatives have no
obligation to make a market in the Preferred Securities, however, and may cease
market making activities, if commenced, at any time. No assurance can be given
as to the liquidity of the trading market for the Preferred Securities.
 
      In order to meet one of the requirements for listing the Preferred
Securities on the NYSE, the Underwriters will undertake to sell lots of 100 or
more Preferred Securities to a minimum of 400 beneficial holders.
 
      Until the distribution of the Preferred Securities is completed, the
rules of the SEC may limit the ability of the Underwriters to bid for and
purchase the Preferred Securities. As an exception to these rules, the
Underwriters will be permitted to engage in certain transactions that stabilize
the price of the Preferred Securities. Such transactions consist of bids or
purchases for the purpose of pegging, fixing or maintaining the price of the
Preferred Securities.
 
      If the Underwriters create a short position in the Preferred Securities
in connection with this offering, i.e., if they sell more Preferred Securities
than are set forth on the cover page of this prospectus, the Representatives
may reduce that short position by purchasing Preferred Securities in the open
market.
 
      The Representatives also may impose a penalty bid on certain Underwriters
and selling group members. This means that if the Representatives purchase
Preferred Securities in the open market to reduce the Underwriters' short
position or to stabilize the price of the Preferred Securities they may reclaim
the amount of the selling concession from the Underwriters and selling group
members who sold those Preferred Securities as part of this offering.
 
      In general, purchases of a security for the purpose of stabilization or
to reduce a short position could cause the price of the security to be higher
than it might be in the absence of such purchases. The imposition of a penalty
bid might also have an effect on the price of a security to the extent that it
were to discourage resales of the security.
 
                                       56
<PAGE>
 
      Neither the Company nor the Underwriters make any representation or
prediction as to the direction or magnitude of any effect that the transactions
described above may have on the price of the Preferred Securities. In addition,
neither the Company nor the Underwriters make any representation that the
Underwriters will engage in such transactions. Any such transactions, once
commenced, may be discontinued at any time without notice.
 
      The Company and the Trust have agreed to indemnify the Underwriters
against, or contribute to payments that the Underwriters may be required to
make in respect of, certain liabilities, including liabilities under the
Securities Act of 1933, as amended.
 
      From time to time, the Underwriters and certain of their affiliates have
engaged, and may in the future engage, in transactions with, and perform
services for, Motorola and its affiliates in the ordinary course of business.
 
      Motorola will pay all expenses associated with the offer and sale of the
Preferred Securities. Motorola estimates that such expenses, excluding
Underwriters' Compensation, will be approximately $550,000.
 
                                 LEGAL MATTERS
 
      Certain matters of Delaware law relating to the validity of the Preferred
Securities will be passed upon on behalf of the Trust by Richards, Layton &
Finger, P.A., Wilmington, Delaware, special Delaware counsel to the Trust. The
validity of the Subordinated Debentures, the Trust Guarantee and certain
matters relating thereto, will be passed upon on behalf of the Company and the
Trust by Carol H. Forsyte of the Company's Law Department. As of January 28,
1999, Ms. Forsyte owned approximately 160 shares of Common Stock and held
options to purchase 10,600 shares of Common Stock, of which options to purchase
3,000 shares were currently exercisable. Certain legal matters will be passed
upon for the Company and the Trust by Kirkland & Ellis (a partnership including
professional corporations), Chicago, Illinois. Certain legal matters will be
passed upon for the Underwriters by Mayer, Brown & Platt, Chicago, Illinois.
 
                                    EXPERTS
 
      The consolidated financial statements and schedules of the Company and
its consolidated subsidiaries as of December 31, 1997 and 1996 and for each of
the years in the three-year period ended December 31, 1997 have been
incorporated by reference in this prospectus and in the registration statement
in reliance upon the reports of KPMG LLP, independent certified public
accountants, incorporated by reference herein, and upon the authority of said
firm as experts in auditing and accounting.
 
                                       57
<PAGE>
 
                             INDEX OF DEFINED TERMS
 
<TABLE>
<S>                                                                          <C>
1940 Act....................................................................   7
Beneficial Owner............................................................  33
Business Day................................................................  26
Change in 1940 Act Law......................................................  27
Code........................................................................  50
Common Securities...........................................................   5
Company.....................................................................   5
Company Payment.............................................................  36
Compounded Interest.........................................................  39
covenant defeasance.........................................................  42
Declaration.................................................................  16
Declaration Event of Default................................................  30
defeasance..................................................................  42
Delaware Trustee............................................................   5
Direct Participants.........................................................  33
DTC.........................................................................   9
DTC Services................................................................  34
Exchange Act................................................................   3
Extension Period............................................................  25
Final Regulations...........................................................  54
First Union.................................................................   5
Form 10-K...................................................................   3
Global Security.............................................................  43
Guarantee Payments..........................................................  45
Guarantee Trustee...........................................................  16
Harris......................................................................   5
Indenture...................................................................  36
Indenture Event of Default..................................................  30
Indenture Trustee...........................................................   5
Indirect Participants.......................................................  33
Industry....................................................................  34
Interest Deduction Date.....................................................  39
Interest Payment Date.......................................................  38
Investment Company Event....................................................  27
IRS.........................................................................  15
Liquidation.................................................................  29
Liquidation Distribution....................................................   8
LYONs.......................................................................   8
Maturity Date...............................................................  39
Motorola....................................................................   5
Non-US Holder...............................................................  50
NYSE........................................................................   3
OID.........................................................................   6
Participants................................................................  33
Preferred Securities........................................................   5
Property Trustee............................................................   5
Property Trustee Account....................................................  16
Redemption Price............................................................   7
Regular Trustees............................................................  16
Regulations.................................................................  51
Representatives.............................................................  55
Scheduled Maturity Date.....................................................  39
SEC.........................................................................   3
</TABLE>
 
                                       58
<PAGE>
 
<TABLE>
<S>                                                                          <C>
Senior Indebtedness.........................................................  37
Special Event...............................................................  13
Sponsor.....................................................................  16
Subordinated Debentures.....................................................   5
Successor Securities........................................................  32
Super Majority..............................................................  30
Systems.....................................................................  34
Tax Event...................................................................  27
Trust.......................................................................   3
Trust Indenture Act.........................................................  16
Trust Guarantee.............................................................   7
Trust Securities............................................................   5
Trustees....................................................................   5
Underwriters................................................................  55
Underwriters' Compensation..................................................  55
Underwriting Agreement......................................................  55
US Holder...................................................................  50
Withholding Agent...........................................................  53
</TABLE>
 
                                       59
<PAGE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                                   20,000,000
                              Preferred Securities
 
                                Motorola Capital
                                    Trust I
 
                             6.68% Trust Originated
                             Preferred SecuritiesSM
                                  ("TOPrSSM")
                           Fully and Unconditionally
                                 Guaranteed by
 
                             [MOTOROLA, INC. LOGO]
 
                               -----------------
                                   PROSPECTUS
                               -----------------
 
                              Merrill Lynch & Co.
 
                           A.G. Edwards & Sons, Inc.
 
                              Goldman, Sachs & Co.
 
                           Morgan Stanley Dean Witter
 
                            PaineWebber Incorporated
 
                       Prudential Securities Incorporated
 
                              Salomon Smith Barney
 
                                January 29, 1999
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------


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