IRIDIUM KICKS OFF ANNUAL TEST YOUR SATELLITE PHONE WEEK

MCLEAN, Va. – May 23, 2011 – Iridium Communications Inc. (Nasdaq:IRDM) today announces its annual “Test Your Satellite Phone Week,” May 23-28, 2011, as part of an ongoing educational program reminding satellite phone users worldwide about the importance of preparing for emergencies. In addition, this year, Iridium is introducing “Pure Reach,” a campaign designed to generate greater online engagement and awareness for emergency preparedness.