A method of routing a terminating call in a network comprising a circuit switched, CS, network, a packet switched, PS, network, and an IP Multimedia Subsystem, IMS,, the method, performed by a subscriber server, comprising the steps of: receiving (300; 350) a request for routing information in relation to the terminating call from a CS node (136, 152) in the CS network; determining (304-308; 354-360) whether a user equipment, UE, associated with the terminating call is registered in the IMS and whether the UE has access to the PS network; instructing the CS node (136, 152; 312, 310; 362, 368) to route the terminating call in the CS network when the UE is not registered in the IMS or when the UE does not have access to the PS network; and instructing the CS node (136, 152; 310; 366, 364) to send the terminating call to the IMS for handling when the UE is registered in the IMS and when the UE has access to the PS network; wherein the user associated with the terminating call has multiple UEs within the same subscription in the IMS and wherein: the step of determining (304-308; 354-360) is performed, for each UE, to generate a first set of UEs to be served by the CS network and a second set of UEs to be served by the PS network; the step of instructing the CS node (152, 136) to route the terminating call (232; 362, 368) is performed when there are one or more UEs in the first set of UEs (232; 362, 368); the step of instructing the CS node (152, 136) to send the terminating call is performed when there are one or more UEs in the second set of UEs (234; 364-366); and the step of determining whether each UE has access to the PS network further includes the step of confirming (306a-308; 358-360) that the current access type is PS access and that each UE has IMS voice over packet switched, VoPS, support. receiving (300; 350) a request for routing information in relation to the terminating call from a CS node (136, 152) in the CS network; determining (304-308; 354-360) whether a user equipment, UE, associated with the terminating call is registered in the IMS and whether the UE has access to the PS network; instructing the CS node (136, 152; 312, 310; 362, 368) to route the terminating call in the CS network when the UE is not registered in the IMS or when the UE does not have access to the PS network; and instructing the CS node (136, 152; 310; 366, 364) to send the terminating call to the IMS for handling when the UE is registered in the IMS and when the UE has access to the PS network; wherein the user associated with the terminating call has multiple UEs within the same subscription in the IMS and wherein: the step of determining (304-308; 354-360) is performed, for each UE, to generate a first set of UEs to be served by the CS network and a second set of UEs to be served by the PS network; the step of instructing the CS node (152, 136) to route the terminating call (232; 362, 368) is performed when there are one or more UEs in the first set of UEs (232; 362, 368); the step of instructing the CS node (152, 136) to send the terminating call is performed when there are one or more UEs in the second set of UEs (234; 364-366); and the step of determining whether each UE has access to the PS network further includes the step of confirming (306a-308; 358-360) that the current access type is PS access and that each UE has IMS voice over packet switched, VoPS, support. the step of determining (304-308; 354-360) is performed, for each UE, to generate a first set of UEs to be served by the CS network and a second set of UEs to be served by the PS network; the step of instructing the CS node (152, 136) to route the terminating call (232; 362, 368) is performed when there are one or more UEs in the first set of UEs (232; 362, 368); the step of instructing the CS node (152, 136) to send the terminating call is performed when there are one or more UEs in the second set of UEs (234; 364-366); and the step of determining whether each UE has access to the PS network further includes the step of confirming (306a-308; 358-360) that the current access type is PS access and that each UE has IMS voice over packet switched, VoPS, support.