Since December 17, 2013 Iridium has been enforcing a maximum validity for the balance of vouchers as below.

All prepaid ‘units’ that have been carried over (from extension top ups) for more than three years will be expired on a daily basis from prepaid account balances. For any customer who has purchased a 3k/5k e‐voucher since December 17, 2009 and going forward, a four‐year expiry period on units will apply.

Units will expire based on the oldest voucher purchase activity which is greater than three years (four years for 3k/5k e‐vouchers) that has not yet been consumed, if applicable. As well as the above, please note that the maximum expiry period allowed at any one time is 3 years.

Unit balances are available to customers by calling 2888 or sending an SMS to 2888 from their Iridium handset. Users will be given the balance of units that may expire if not used within the next six months. This message will be based on the oldest e‐voucher purchase activity and units that are subject to expiry within the next six months, if applicable.