Patent ID: 8406151

Claim:
A mobile device capable of supporting packet data services and voice services offered by wireless networks, the mobile device comprising: a memory; a packet data services blacklist provided in the memory, the packet data services blacklist identifying wireless networks that do not provide packet data services to the mobile device, the packet data services blacklist being based on previous packet data service authentication rejections and being distinct from a voice services blacklist; a historical blacklist provided in the memory, distinct from the packet data services blacklist and the voice services blacklist, the historical blacklist identifying wireless networks that are no longer in the packet data services blacklist and were once in the packet data services blacklist within a particular time period; a processor for updating the packet data services blacklist in response to newly received packet data service authentication information, and for determining whether a current system identifier is stored in the historical blacklist in response to a determination that there are no wireless networks newly blacklisted in relation to the mobile device for which an identification has not been communicated to a second device.