Patent ID: 8914849

Claim:
A method for replenishing internally stored account parameters on a select group of wireless devices, the method comprising: providing a group of wireless devices, each wireless device having internally stored account parameters associated with a prepaid amount of authorization for wireless usage of the wireless device; determining a need for a required change in at least one internally stored account parameter associated with the prepaid amount of authorization for wireless usage of the wireless device in the select group of wireless devices; obtaining an encryption key uniquely associated with the group of wireless devices; generating an encrypted account update message using the encryption key and the selected at least one account parameter to be changed that includes the prepaid amount of authorization for wireless usage of the wireless device; and broadcasting the encrypted account update message for receipt by the group of wireless devices in order to update the internally stored account parameters within the group of wireless devices to replenish their internally stored prepaid amount of authorization for wireless usage of the wireless device, wherein the broadcast encrypted account update message is only able to be received and decrypted by those wireless devices within the group of wireless devices.