Iridium world wide prepaid SIM with 300 minutes (7,200 units) and valid for 365 days. No rollover or refill minutes allowed. Burn rate of Units is calculated as follows: ISU to PSTN @ 60 units; ISU to Voicemail @ 30 units; ISU to other SAT @ 540 units; 2-stage incoming @ 60 units; SMS @ 6 units; ISU data connect @ 60 units. Refill minutes can be added at the current rate before expiration date to maintain phone number.
