Patent ID: 8364205
Filing Date: 2013-01-29
Classification: H04W

Abstract:
1. A mobile phone, comprising: at least two subscriber identity module (SIM) cards; at least one processor; a storage system to store a plurality of history telecom operators of history outgoing numbers that are queried from a number portability database (NPDB), and one or more programs that are executed by the at least one processor, the one or more programs comprising: a querying module operable to query the NPDB for at least two telecom operators of the at least two SIM cards, and determine whether a telecom operator of an outgoing number dialed using the mobile phone is found in the storage system, and whether a validity period of the telecom operator of the outgoing number in the storage system expires when the telecom operator of the outgoing number is found in the storage system, obtain the telecom operator of the outgoing number from the storage system when the validity period does not expire, and query the NPDB for the telecom operator of the outgoing number when the validity period expires; and a selecting module operable to select one SIM card with one telecom operator same as the telecom operator of the outgoing number from the at least two SIM cards.