Patent ID: 8923855
Filing Date: 2014-12-30
Classification: H04W

Abstract:
1. A method comprising: transmitting, by a first network device, a first request for roaming status information of a user device, receiving, by the first network device, first information based on the first request; determining, by the first network device, that the user device is not connected to the first network based on the first information; transmitting, by the first network device, a second request for roaming status information to a device associated with a second network, receiving, by the first network device, second information based on transmitting the second request; determining, by the first network device, whether the user device is connected to the second network based on the second information; obtaining, by the first network device and when the user device is not connected to the second network, carrier information from a device associated with a third network; determining, by the first network device that a particular carrier, of a plurality of carriers associated with the third network, provides service to the user device based on the carrier information; obtaining, by the first network device, third information from a device associated with the particular carrier; determining, by the first network device, whether the user device is connected to the third network based on the third information.