Patent ID: 8825010

Claim:
A cell locking method for a mobile terminal, wherein said method comprises: searching, by the mobile terminal, a current cell at a current location to acquire a system identification (SID), a network identification (NID), a base station identifier (BASE ID) and a pseudo-random number (PN) of said cell; judging, by the mobile terminal, whether said SID, said NID, said BASE ID and said PN of the current cell are already stored in a database of said mobile terminal; when said SID, said NID, said BASE ID and said PN of the current cell are all already stored in the database of said mobile terminal, setting said mobile terminal to a normal status for normal operation; when said SID, said NID and said PN are already stored in the database of said mobile terminal, but said BASE ID is not stored in the database and said database is not full, writing said BASE ID, with said SID, said NID and said PN, into the database, and setting said mobile terminal into the normal status for normal operation; when said BASE ID and said PN are already stored in the database of said mobile terminal, but said SID and said NID are not stored in the database, writing said SID and said NID, with said BASE ID and said PN, into the database, and setting said mobile terminal into the normal status for normal operation; for any other judgment results, setting said mobile terminal to a lock status for not normal operation.