Iridium Satellite Phone Global Prepaid SIM Card with 75 Minutes (30 Day Validity) 75 Minutes valid for 30 days on the Iridium Satellite Network Airtime can be rolled over when refilled before expiration. Check with specific seller on pricing and policies. Works in all Iridium handsets No charge for incoming voice calls and text messages. Outgoing calls to any global landline or mobile phone can be made at a flat rate per minute. Check with seller on activation, renewal & refill policies and procedures.