Patent ID: 8995994
Filing Date: 2015-03-31
Classification: H04W

Abstract:
1. A telecommunications system comprising: a first mobile telecommunications network having a first radio access network with which a mobile telecommunications device is initially registered to enable the mobile telecommunications device to communicate wirelessly with the first mobile telecommunications network using the first radio access network; a second mobile telecommunications network having a second radio access network and with which the mobile telecommunications device can be temporarily registered to enable the mobile telecommunications device to communicate wirelessly with the second mobile telecommunications network using the second radio access network, the first and second mobile telecommunications networks being connected together for communication therebetween by a communication link; and a third mobile telecommunications network with which the mobile telecommunications device can be temporarily registered and operable to communicate with the mobile telecommunications device using the second radio access network; wherein when the mobile device registers temporarily with the second mobile telecommunications network, a notification is sent via the communication link to the first mobile telecommunications network, in response to which the first mobile telecommunications network causes the mobile telecommunications device to register with the third mobile telecommunications network to enable communication between the first mobile telecommunications network and the mobile telecommunications device, said communication being routed between the first mobile telecommunications network and the third mobile telecommunications network by a connection including the Internet but not including the communication link.