A method in a user equipment "UE", the method comprising: maintaining in memory, at the UE, one or more Emergency Service Category "ESC" Values, each ESC Value associated with an Emergency Service Uniform Resource Name "URN" indicative of a type of emergency service; receiving at the UE a Session Initiation Protocol "SIP" 380 response message, the message including a URN; and performing one of: sending a SIP request message towards a Public Safety Answering Point (PSAP), the SIP request message including the URN and the SIP request message containing emergency-related information associated with the UE; or if the UE tries the Circuit Switched network, performing one of: if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service associated with an ESC Value as maintained in memory, initiating a Circuit Switched emergency request message using the type of emergency service; or if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service not associated with an ESC Value as maintained in memory, initiating a Circuit Switched non-emergency call request. maintaining in memory, at the UE, one or more Emergency Service Category "ESC" Values, each ESC Value associated with an Emergency Service Uniform Resource Name "URN" indicative of a type of emergency service; receiving at the UE a Session Initiation Protocol "SIP" 380 response message, the message including a URN; and performing one of: sending a SIP request message towards a Public Safety Answering Point (PSAP), the SIP request message including the URN and the SIP request message containing emergency-related information associated with the UE; or if the UE tries the Circuit Switched network, performing one of: if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service associated with an ESC Value as maintained in memory, initiating a Circuit Switched emergency request message using the type of emergency service; or if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service not associated with an ESC Value as maintained in memory, initiating a Circuit Switched non-emergency call request. sending a SIP request message towards a Public Safety Answering Point (PSAP), the SIP request message including the URN and the SIP request message containing emergency-related information associated with the UE; or if the UE tries the Circuit Switched network, performing one of: if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service associated with an ESC Value as maintained in memory, initiating a Circuit Switched emergency request message using the type of emergency service; or if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service not associated with an ESC Value as maintained in memory, initiating a Circuit Switched non-emergency call request. if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service associated with an ESC Value as maintained in memory, initiating a Circuit Switched emergency request message using the type of emergency service; or if the URN included in the SIP 380 response message is an Emergency Service URN indicative of a type of emergency service not associated with an ESC Value as maintained in memory, initiating a Circuit Switched non-emergency call request.