Patent ID: 8706158

Claim:
A mobile phone comprising: an input unit for generating input signals in response to user inputs; a non-erasable programmable memory for storing at least one phone number, wherein each of the at least one phone number corresponds to a SIM card; a display unit for displaying information; and a control unit, further comprising: a number acquiring module for acquiring a phone number of a SIM card inserted to the mobile phone when the mobile phone is powered on; a determining module for comparing the acquired phone number with the at least one phone number in the non-erasable programmable memory and determining whether the non-erasable programmable memory has stored the phone number of the inserted SIM card; and an output control module for controlling the display unit to display information which prompts authentication success and authorizing a use of the mobile phone when the determining module determines that the non-erasable programmable memory has stored the phone number of the inserted SIM card, and for controlling the display unit to display information which prompts authentication fail and not authorizing a use of the mobile phone when the determining module determines that the phone number of the inserted SIM card does not exist in the non-erasable programmable memory.