First Successful Call Completed Over Iridium Next Hardware

Iridium Communications Inc. (Nasdaq:IRDM) and its prime contractor, Thales Alenia Space, announced an important milestone in the development of the new Iridium NEXT constellation by completing the first successful end-to-end test call using Iridium NEXT hardware. The call provides initial validation of the L-band hardware and processing software that will be used in the Iridium NEXT constellation

The test call was placed using an Iridium satellite phone. The call path was routed through Iridium NEXT satellite hardware components simulating the connection to a satellite, through Iridium's upgraded ground network, through the public switched telephone network (PSTN) and ultimately to a cell phone. This test marks a significant milestone in Iridium's system integration and testing efforts, and the first time a full end-to-end verification of the call flow has been accomplished. This is also the first step in a comprehensive effort to fully validate service capability through the Iridium NEXT system, which is being readied for the first scheduled launch in 2015.

"Placing the first call through Iridium NEXT hardware is a big step for our team as they work to ensure high quality satellites will be ready for launch," said Scott Smith, chief operating officer. "The call quality we experienced was remarkable, and this achievement is a reflection of many long hours of design and development work by a very talented group of partners."

Iridium NEXT is the Company's next generation satellite constellation, offering improved bandwidth, improved data speeds and the global coverage Iridium is known for. It will include a hosted payload for AireonSM, the first truly global aircraft tracking and surveillance capability, extending ADS-B coverage and benefits to every flight path across the planet. The Iridium NEXT satellite network will also serve as a platform for the company's Iridium PRIMESM offering, a turnkey solution for hosted payloads offering significant cost savings for civil, commercial and government payload customers.

For more information on Iridium NEXT, go to www.iridium.com.

About Iridium Communications Inc.

IridiumĀ® is the only mobile voice and data satellite communications network that spans the entire globe. Iridium enables connections between people, organizations and assets to and from anywhere, in real time. Together with its ecosystem of partner companies, Iridium delivers an innovative and rich portfolio of reliable solutions for markets that require truly global communications. The company has a major development program underway for its next-generation network -- Iridium NEXT. Iridium Communications Inc. is headquartered in McLean, Va., U.S.A., and its common stock trades on the NASDAQ Global Select Market under the ticker symbol IRDM. For more information about Iridium products, services and partner solutions, visit www.iridium.com.

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