Iridium Satellite Phone Prepaid SIM Card (no airtime) Inactive prepaid SIM card for all Iridium satellite phones including 9500, 9505, 9505A, 9555, 9575 Extreme, and Iridium Go! Ready to activate on any Iridium prepaid service plan of your choice. 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. SIM card can be activated on a future date, simply select your activation date using our online activation request form.