Inmarsat Launches IsatPhone Pro

LONDON, June 15, 2010 - Inmarsat (LSE:ISAT), the leading provider of global mobile satellite
communications services, today launched its new global handheld satellite
phone, the IsatPhone Pro. Retailing for as little as US$500, the phone will
be a "game changer" in this specialist market.

The new service, Inmarsat's first global handheld, offers an unmatched
specification at the most competitive price point in the market. Extensive
testing has shown that IsatPhone Pro has the market's longest battery life
and the most robust handset. These and other market-leading services and
features are now available at a suggested retail price of US$699, with
promotional prices expected to be around US$500-600.

Comments Andrew Sukawaty, Chairman and CEO of Inmarsat:

"With the promotional incentives at launch, our US$500-600 IsatPhone Pro
is a "game changer." This phone gives us price and performance leadership for
the remote environment market.

"We have today entered the handheld satellite phone market with a global
handset. It targets customers served by Inmarsat for decades, both at sea and
in the most remote parts of the global landmass. It is supported by our
existing satellite network and it uses proven technology customized for use
in these environments.

"The IsatPhone Pro is tailor-made for tough use. Rugged, splash and dust
proof, and with long battery life, it offers global service from day one.
This is the first satellite phone to be built for the Inmarsat network from
the ground-up, responding to customer needs, for use in harsh environments.

"Today we have delivered a robust, affordable, professional handset for
global users. IsatPhone Pro joins our award-winning portfolio of data and
voice terminals. It gives us a full range of services for remote environment
communications use."

IsatPhone Pro offers up to 8 hours talk time and up to 100 hours on
standby. The handset has secured an IP54 rating and is dust, splash and shock
resistant. It is also capable of operating from -20 degrees C to +55 degrees
C, which is the widest temperature range of any satellite phone.

Targeted primarily at professional users in the government, media, aid,
oil and gas, mining and construction sectors, IsatPhone Pro offers
high-quality satellite telephony, text and email messaging. Location data can
also be viewed and sent in a text message.

The unique design of IsatPhone Pro, including a fully-manoeuvrable
antenna, allows the handset to be placed on its side for easy hands-free use
via Bluetooth. IsatPhone Pro has an intuitive GSM-style interface with a
high-visibility colour screen, and a larger keypad for easy dialling in
gloves.

"IsatPhone Pro will undoubtedly shake-up the global handheld market,"
said Helen Stalker, Commercial Director for Global Satellite Phone Services
at Inmarsat. "It's the best overall proposition in the market. It meets all
the fundamental user requirements and Inmarsat provides the best channel
support in the industry. We have worked with the best developers,
manufacturers and logistics providers to bring IsatPhone Pro to market. And
through our 13 distribution partners worldwide, the levels of customer
service and support are unrivalled."

The distribution partners for IsatPhone Pro are AST, China Telecom,
Evosat, Korea Telecom, MCN, MVS, Network Innovations, NSSL, RRSat, Satcom
Global, Singtel, Stratos and Vizada.

More details, and the full specification, are available at
www.inmarsat.com/isatphone

The latest news, tweets, blog entries and videos on IsatPhone Pro, from
around the world, can be found at www.isatphonelive.com

About Inmarsat

Inmarsat plc (LSE: ISAT) is the leading provider of global
mobile satellite communications services. Since 1979, Inmarsat has been
providing reliable voice and high-speed data communications to governments,
enterprises and other organizations, with a range of services that can be
used on land, at sea or in the air. The company's services are delivered
through a global network of more than 400 distribution partners and service
providers operating in 100 countries. For the year ended 31 December 2009,
Inmarsat plc had total revenue of US$1,038.1 million (2008: US$996.7 million)
with an EBITDA of US$594.2 million (2008: US$531.2 million). For more
information, please visit www.inmarsat.com.

Media Contacts, John Warehand, PR Manager, Inmarsat, Tel : +44-(0)20-7728-1579, Email: john_warehand at inmarsat.com; Neville Rawlings, On behalf of Inmarsat, Bell Pottinger Business & Brand, Tel: +44-(0)20-7861-2502, Email: nrawlings at bell-pottinger.co.uk; Rebecca Milne, On behalf of Inmarsat, Bell Pottinger Business & Brand, Tel: +44-(0)20-7861-2450, Email: rmilne at bell-pottinger.co.uk