Patent ID: 8391865

Claim:
A method for selecting at least one of a plurality of systems on a multi-mode device capable of communicating on a plurality of air interface technologies comprising a first air interface technology and a second air interface technology, the method comprising: receiving a carrier input indicating a limitation in applying an overlay function; executing the overlay function in accordance with the carrier input to identify an air interface technology from the first air interface technology and the second air interface technology; triggering a network acquisition attempt of a system corresponding to the identified air interface technology; determining results of the network acquisition attempt; executing the overlay function, using the results of the network acquisition attempt, to select one of the first air interface technology and the second air interface technology for communication by the multi-mode device; and if the network acquisition attempt was successful, determining whether the multi-mode device will communicate, simultaneously to communication using the selected one air interface technology, using a non-selected air interface technology of the first air interface technology and the second air interface technology.