Patent ID: 8948737
Filing Date: 2015-02-03
Classification: H04W,Y02D

Abstract:
1. A communication device, comprising: a Subscriber Identity Module (SIM) card comprising a central processing unit (CPU) and a first storage device, the first storage device storing a first phone number and a second phone number of the SIM card; and one or more programs that are stored in the first storage device and are executed by the CPU of the SIM card, the one or more programs comprising: a receiving module that receives Location Area Identity (LAI) information from the Global System for Mobile communication (GSM) network; a determination module that determines whether a Mobile Country Code (MCC) of the LAI information is consistent with an MCC of an International Mobile Subscriber Identity (IMSI) of the first phone number of the SIM card, the first phone number being activated while the second phone number being inactivated; and a switching module that activates the second phone number when the MCC of the LAI information is inconsistent with the MCC of IMSI of the first phone number.