An apparatus for a user equipment, UE, comprising: a data storage device to store a value of an extended service request for mobile terminated services, EXT-MT, timer, the value of the EXT-MT timer being less than a value of a guard timer of a visitor location register, VLR; processing circuitry operably coupled to the data storage device, the processing circuitry to: decode a paging for a mobile terminated circuit-switched fallback, MT CSFB, call received from a mobility management entity, MME, via a base station; generate an extended service request message to be transmitted to the MME via the base station responsive to the paging for the MT CSFB call; start the EXT-MT timer upon transmission of the extended service request message; and if the EXT-MT timer expires before the UE successfully performs inter-system change and if a circuit-switched, CS, fallback cancellation request was not received: attempt to select a radio access technology of a different type of radio access network, RAN, wherein: the EXT-MT timer comprises a T3417 extended service request for mobile terminated services, T3417ext-mt, timer; the guard timer of the VLR comprises a Ts14 guard timer; the different type of RAN comprises a Global System for Mobile communications, GSM, Enhanced Data Rates for GSM Evolution, EDGE, RAN, GERAN, or a Universal Mobile Telecommunications Service, UMTS, Terrestrial RAN, UTRAN; the inter-system change comprises an inter-system change from S1 mode to A/Gb mode or lu mode; and the processing circuitry is configured to complete Mobility Management, MM, and Call Control, CC, procedures for establishment of the MT CSFB call if the attempt to select the radio access technology of the different type of RAN is successful. a data storage device to store a value of an extended service request for mobile terminated services, EXT-MT, timer, the value of the EXT-MT timer being less than a value of a guard timer of a visitor location register, VLR; processing circuitry operably coupled to the data storage device, the processing circuitry to: decode a paging for a mobile terminated circuit-switched fallback, MT CSFB, call received from a mobility management entity, MME, via a base station; generate an extended service request message to be transmitted to the MME via the base station responsive to the paging for the MT CSFB call; start the EXT-MT timer upon transmission of the extended service request message; and if the EXT-MT timer expires before the UE successfully performs inter-system change and if a circuit-switched, CS, fallback cancellation request was not received: attempt to select a radio access technology of a different type of radio access network, RAN, decode a paging for a mobile terminated circuit-switched fallback, MT CSFB, call received from a mobility management entity, MME, via a base station; generate an extended service request message to be transmitted to the MME via the base station responsive to the paging for the MT CSFB call; start the EXT-MT timer upon transmission of the extended service request message; and if the EXT-MT timer expires before the UE successfully performs inter-system change and if a circuit-switched, CS, fallback cancellation request was not received: attempt to select a radio access technology of a different type of radio access network, RAN, the EXT-MT timer comprises a T3417 extended service request for mobile terminated services, T3417ext-mt, timer; the guard timer of the VLR comprises a Ts14 guard timer; the different type of RAN comprises a Global System for Mobile communications, GSM, Enhanced Data Rates for GSM Evolution, EDGE, RAN, GERAN, or a Universal Mobile Telecommunications Service, UMTS, Terrestrial RAN, UTRAN; the inter-system change comprises an inter-system change from S1 mode to A/Gb mode or lu mode; and the processing circuitry is configured to complete Mobility Management, MM, and Call Control, CC, procedures for establishment of the MT CSFB call if the attempt to select the radio access technology of the different type of RAN is successful.