Patent ID: 8913980
Filing Date: 2014-12-16
Classification: H04W

Abstract:
1. A method for indicating an emergency call availability to a Mobile Equipment (ME) on a first mobile telecommunications network and on a second mobile telecommunications network, the method comprising: storing, at a memory device attached to the ME, availability data regarding the possibility of unauthenticated emergency calls; and indicating, by the ME, when the ME is in a limited service state, emergency call availability based on the availability data; wherein the first and second mobile telecommunications networks provide a first network service and a second network service to the ME, each of the first and the second network services comprising at least one of the group consisting of: a Circuit Switched (CS) service, a Packet Switched (PS) service, and an Internet Protocol Multimedia Subsystem (IMS) service; wherein the availability data indicates, for each of the first network service and the second network service, an emergency calling status from a plurality of emergency calling statuses, the plurality of emergency calling statues including: