Patent ID: 7386312

Claim:
A mobile terminal comprising: a communication unit operable to communicate over a first mobile communication network and a second mobile communication network; and a control unit coupled with said communication unit, said control unit operable, when said mobile terminal is registered to said second mobile communication network, to monitor for said, mobile terminal to be engaged in a voice communication over said second mobile communication network; wherein said control unit is further operable to monitor for a change in location of said mobile terminal; said control unit is further operable to receive from said second mobile communication network, through said communication unit, a registration possibility indication of whether it is possible to register with said first mobile communication network; and said control unit is further operable, responsive to a change in location of said mobile terminal, to attempt to register to said first mobile communication network after confirmation by said control unit that said voice communication is not presently in progress, and confirmation by said control unit that said registration possibility indication indicates that it is possible to register to said first mobile communication network.