ACCESSING A CORE NETWORK FROM A USER DEVICE THAT DOES NOT SUPPORT PACKET-DATA VOICE CALLS OVER THE CORE NETWORK

摘要

A user device supports a first radio access technology (RAT) and a second RAT (902). The user device supports packet-based voice calls over the first RAT and is configured to operate in a voice-centric mode via a usage setting. An access mode in which the user device is capable of operating using the second RAT is enabled (904), and a cell in which a base station operates according to the second RAT is selected even though the user device does not support packet-based voice calls over the second RAT (906 (908).