EXHIBIT 99.1


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Media Contacts:
Winnie Lerner
Jessica Liddell
Abernathy MacGregor
212/371-5999

Motient Corporation Updates Shareholders on MSV Roll-Up

February 2, 2006 - Lincolnshire, IL -Motient Corporation (MNCP) announced today
that it is continuing to actively pursue transactions that would allow it to
rationalize the ownership of Mobile Satellite Ventures LP (MSV) and TerreStar
Networks Inc. through the creation of two distinct public entities, one whose
primary asset is an equity interest in MSV, and one whose primary asset is
shares of TerreStar common stock.

Previously, on September 22, 2005, Motient announced that it had entered into a
non-binding term sheet to consolidate the ownership of MSV and TerreStar into
Motient, to be followed by a spin-off of TerreStar to Motient's shareholders.
These transactions were intended to rationalize the ownership of MSV and
TerreStar by creating a single public entity in control of TerreStar, and a
single public entity in control of MSV. As discussions related to these
transactions have progressed, Motient has determined that, while the goals of
the previously announced transactions remain in the best interests of Motient's
shareholders, the structure previously announced for accomplishing these goals
will likely need to be modified.

Accordingly, Motient believes that the previously announced roll-up transaction
is unlikely to occur as contemplated or announced. Instead, Motient now intends,
either directly or indirectly, to spin-off its interests in MSV to Motient
shareholders. Motient's primary remaining asset would then be its controlling
interest in TerreStar, although Motient would expect to retain a minority of its
current MSV interests (directly or indirectly) to issue to the holders of
Motient's preferred stock upon its conversion. Motient is actively investigating
the specific transaction structures available to it to accomplish these goals.

Motient currently owns 61% of TerreStar and 49% of MSV. There is no guarantee
that the public entities which will own Motient's current TerreStar and MSV
interests will ultimately own those respective percentages of TerreStar or MSV.
Each entity could own more or less than those amounts, depending on the final
structure adopted. Motient's Chief Operating Officer, Christopher Downie,
stated, "Although we are restructuring our form of transaction, our ultimate
objective remains the same. Our intention is to separate our ownership interests



in MSV and TerreStar into two separately governed public entities, which we
believe will provide each company, and thus our shareholders, the best path to
capture the current and future value potential we believe exists for each of MSV
and TerreStar."

Motient can provide no assurance that any of these transactions will ultimately
be completed on the terms described above, if at all, since, among other things,
significant documentation and/or regulatory filings will need to be finalized by
one or more parties, including Motient.

About Motient Corporation:

Motient is a nationwide provider of terrestrial wireless data solutions for
Fortune 500 companies and the small to medium size enterprise business market.
Motient provides access to multiple networks platforms, including GPRS, 1XRTT
and its own DataTac Network. Motient simplifies the wireless experience for
application providers, hardware vendors, value added resellers and customers by
offering proprietary applications, one source support and wireless consulting
services that enhance the performance, efficiency and cost-effectiveness of
enterprise wireless networks.

Motient is also the controlling shareholder of TerreStar Networks Inc., a
development-phase satellite communications company, and a minority shareholder
of Mobile Satellite Ventures, LP, an established satellite communications
company. TerreStar and MSV are both in the process of developing next-generation
hybrid networks that plan to provide ubiquitous wireless service by integrating
land-based towers and powerful satellites. These new networks will deliver
services to standard wireless devices everywhere in North America. For
additional information on Motient, please visit the company's website at
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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