Patent ID: 7313365
Filing Date: 2007-12-25
Classification: H04W

Abstract:
1. A method for staying tuned to a less preferred communications system in a cellular communications device, the method comprising: transmitting one or more digital messages over an air interface intended for a first communications system by the cellular communications device, a digital call comprising the one or more digital messages; releasing the digital call; and continuing to be receptive to the first communications system after releasing the digital call while having an indicator that a second communications system is preferred over the first communications system; starting a re-scan timer in response to releasing the digital call; determining whether the re-scan timer indicates that a time period has expired after releasing the digital call; waiting after releasing the digital call, if the time period has not expired; and scanning for the second communication system after releasing the digital call, if the time period has expired, the time period being significantly longer than an amount of time needed to do one scan for the second communications system.