Patent ID: 8238980

Claim:
A method for utilization of multiple radio access technologies in a communications device, comprising the steps of: generating a dynamic prioritization list assigning a highest priority and a second lower priority to radio access technologies based on a location of the communications device in a first geographic area; powering down a second radio in the communications device associated with the second lower priority radio access technology in the first geographic area when a defined battery level is reached for a battery of the communications device; attempting based on the prioritization list to extract control channel information comprising cell site identities, frequencies available, and access timing details from a radio access technology assigned the highest priority by a radio in the communications device associated with the highest priority radio access technology in the first geographic area, wherein the highest priority is assigned to the radio access technology dynamically based on a network identity of the radio access technology in the first geographic area to avoid roaming to a roaming network, and if the control channel information for the highest priority radio access technology in the first geographic area is extracted by the radio associated with the highest priority radio access technology in the first geographic area, maintaining the powered down state of the second radio in the communications device.