EXHIBIT 99.1


Media Contacts:
Christopher Downie
Motient Corporation
847-478-4200
chris.downie@motient.com


        Motient Announces Revised Terms of Proposed Rights Offering and
                                 New Record Date

LINCOLNSHIRE, IL, December 7, 2004 -- Motient Corporation (MNCP) announced today
that it is revising the terms of its proposed common stock rights offering,
which was previously announced on November 22, 2004, and setting a new record
date for the revised rights offering.

Motient anticipated that the total number of shares to be issued in the
previously announced rights offering would not exceed 2.5 million shares. The
company did not specifically include a cap on issued shares in the terms of the
proposed rights offering given its previously announced assumptions regarding
waivers of the right to participate in the rights offering made by purchasers in
the company's November 12, 2004 private placement. Recent information has
indicated that more shares than the company anticipated may be held on the
record date by stockholders who did not waive their right to participate in the
rights offering. Therefore the company is revising the terms of the proposed
rights offering to cap the number of shares that may be issued and is setting a
new record date for the revised rights offering. The company had reserved the
right to abandon the previously announced rights offering, and this revision of
the terms of the rights offering is being accomplished by abandoning the
previously announced rights offering and undertaking a new rights offering on
the terms set forth below.

Under the revised rights offering, Motient will issue to its stockholders one
right for each share of Motient common stock held as of the close of business on
December 17, 2004. Each right will entitle any holder that did not participate
in the November 12, 2004 private placement of Motient common stock to purchase
0.103 shares of Motient's common stock at a price of $8.57 per share, with
fractions rounded up to the next whole share. However, in no event will Motient
issue more than 2.5 million shares in the rights offering, and if valid
subscriptions for more than 2.5 million shares are received, the number of
shares to be acquired pursuant to each valid subscription will be reduced pro
rata so that the total number of shares issued in the rights offering will equal
2.5 million shares. Motient currently has approximately 56.5 million shares of
common stock outstanding on a fully diluted basis.

If eligible stockholders subscribe for all of the shares that are available in
the rights offering, the aggregate proceeds of the rights offering will be
approximately $21.4 million.

The rights will be non-transferable and will expire if not exercised within the
exercise period. The rights will not be exercisable until the registration
statement covering the rights and the shares of underlying common stock is
declared effective by the SEC, and the exercise period will expire 30 days after
the rights become exercisable. Motient has not filed a registration statement
relating to the rights offering, but intends to do so as soon as practicable.

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The holders of the rights will not have over-subscription rights, and there will
be no backstop to purchase unsubscribed shares. Purchasers that purchased shares
in the November 12, 2004, private placement of Motient's common stock have
waived their rights to participate in the rights offering.

Motient reserves the right to abandon this revised rights offering at any time
prior to the effectiveness of the registration statement relating to the rights
offering, and upon any such abandonment, any and all of the rights previously
issued will be cancelled, will no longer be exercisable and will be of no
further force or effect.

These securities may not be sold nor may offers to buy be accepted prior to the
time the registration statement becomes effective. This press release shall not
constitute an offer to sell or the solicitation of an offer to buy nor shall
there be any sale of these securities in any state or jurisdiction in which such
offer, solicitation or sale would be unlawful prior to registration or
qualification under the securities laws of any such state or jurisdiction.
Nothing in this press release should be construed as investment advice or
otherwise as an invitation to engage in investment activity.

No prospectus related to the rights offering has been, or will be, filed for
registration with any authority outside of the United States. The rights and
shares of common stock are not being offered or sold to any person outside the
United States.


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About Motient Corporation:

Motient Corporation is a nationwide provider of wireless data solutions for
Fortune 500 companies and the small to medium size enterprise business market.
Motient built and operated the nation's first wireless data network, DataTAC(R),
and offers proprietary applications, one source support and wireless consulting
services that enhance the performance, efficiency and cost-effectiveness of
enterprise wireless networks.

http://www.motient.com.

Statement under the Private Securities Litigation Reform Act:

With the exception of any historical information contained in this release, the
matters described herein contain forward-looking statements that involve risk
and uncertainties that may individually or mutually impact the matters herein
described, which could cause actual results or revenues to differ materially
from those contemplated by these statements.



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