Patent ID: 8666366

Claim:
A method performed by a mobile device, the method comprising: receiving an activation record from an activation service, the activation record including data that identifies the mobile device and identifies a carrier network associated with the mobile device; authenticating the activation record; and responsive to successfully authenticating the activation record, comparing the data in the activation record to data associated with the mobile device prior to receiving the activation record, wherein the comparing comprises: comparing an Integrated Circuit Card Identifier (ICCID) in the activation record to an ICCID of a Subscriber Identity Module (SIM) card installed on the mobile device, and determining, based on the comparing, whether the mobile device is in a mismatched SIM state in which a user has placed a different SIM in the mobile device, disabling a radio or modem in the mobile device in response to determining that the mobile device is in the mismatched SIM state, comparing an International Mobile Equipment Identity (IMEI) in the activation record to an IMEI stored in a memory of the mobile device, and determining, based on the comparison, whether the mobile device is in a mismatched IMEI state in which a radio has changed, and locking down a telephony application, while allowing other applications to operate, in response to determining that the mobile device is in the mismatched IMEI state.