Patent ID: 9485718
Filing Date: 2016-11-01
CPC Classification: H04W

Claim Text:
1. A method of recovering from an out-of-service state in a wireless device, comprising: performing a first acquisition database scan to acquire a first renewed service connection for a first subscriber identification module (SIM) within the wireless device, wherein the first acquisition database scan includes first searches for first channels identified in a first technology list from a first acquisition database until either the first renewed service connection is acquired or the first technology list is exhausted, wherein the first technology list identifies the first channels from a first radio access technology, wherein a currently used channel associated with an acquired service of a second SIM within the wireless device is first on the first technology list; performing a second acquisition database scan for acquiring the first renewed service connection for the first SIM in response to determining that the first technology list was exhausted, wherein the second acquisition database scan includes second searches for second channels identified in a second technology list from the first acquisition database until either the first renewed service connection is acquired or the second technology list is exhausted, wherein the second technology list identifies the second channels from a second radio access technology; and performing a first full frequency scan to acquire the first renewed service connection for the first SIM in response to determining that the second technology list was exhausted.