A method performed by a User Equipment, UE, with a voice setting determined by a first indicator related to voice services in an Evolved Packet System, EPS, the method comprising: receiving a Non Access Stratum, NAS, protocol Accept message with a second indicator indicating that an IP Multimedia Subsystem, IMS, voice over packet-switched, PS, session is supported; and responsive to the first indicator and the second indicator, determining availability of voice services over IMS, wherein determining the availability of voice services further comprises initiating (2A-1) an IMS registration when the UE is not already registered with the IMS; said method being characterized by the further steps of: if another UE indicator for usage setting is Data Only (1A-7, 72), in event of a failure of said IMS registration and if an additional combined Tracking Area Update, TAU, for Circuit Switched, CS, Fallback, CSFB, also fails (1A-5), notifying to the user that voice services cannot be realized (5A-1) and, responsive to said notification, receiving from the user a first indication to accept the current Data Only UE usage setting, or a second indication to change the UE usage setting to Voice Centric or Data Centric; staying in current Radio Access Technology, RAT, (1A-8) if the UE received said first indication; selecting another RAT (lA-9;) if the UE received said second indication. receiving a Non Access Stratum, NAS, protocol Accept message with a second indicator indicating that an IP Multimedia Subsystem, IMS, voice over packet-switched, PS, session is supported; and responsive to the first indicator and the second indicator, determining availability of voice services over IMS, wherein determining the availability of voice services further comprises initiating (2A-1) an IMS registration when the UE is not already registered with the IMS; said method being characterized by the further steps of: if another UE indicator for usage setting is Data Only (1A-7, 72), in event of a failure of said IMS registration and if an additional combined Tracking Area Update, TAU, for Circuit Switched, CS, Fallback, CSFB, also fails (1A-5), notifying to the user that voice services cannot be realized (5A-1) and, responsive to said notification, receiving from the user a first indication to accept the current Data Only UE usage setting, or a second indication to change the UE usage setting to Voice Centric or Data Centric; staying in current Radio Access Technology, RAT, (1A-8) if the UE received said first indication; selecting another RAT (lA-9;) if the UE received said second indication. if another UE indicator for usage setting is Data Only (1A-7, 72), in event of a failure of said IMS registration and if an additional combined Tracking Area Update, TAU, for Circuit Switched, CS, Fallback, CSFB, also fails (1A-5), notifying to the user that voice services cannot be realized (5A-1) and, responsive to said notification, receiving from the user a first indication to accept the current Data Only UE usage setting, or a second indication to change the UE usage setting to Voice Centric or Data Centric; staying in current Radio Access Technology, RAT, (1A-8) if the UE received said first indication; selecting another RAT (lA-9;) if the UE received said second indication.