A method of provisioning communication services in a network system, the method comprising: managing a state of each of a plurality of radio access networks (110, 120, 130, 140, 150); maintaining an indication of available services of each of the plurality of radio access networks (110, 120, 130, 140, 150); engaging a primary access network of the plurality of radio access networks (110, 120, 130, 140, 150) in an active state with a user equipment (160, 161, 162, 163); registering the user equipment (160, 161, 162, 163) with a secondary access network of the plurality of access networks in a non-active state, wherein registering the user equipment (160, 161, 162, 163) comprises: attaching the user equipment (160, 161, 162, 163) with the secondary access network; activating a packet data protocol context with the secondary access network; registering the user equipment (160, 161, 162, 163) with an Internet Protocol Multimedia Subsystem on the secondary access network; and informing the Internet Protocol Multimedia Subsystem that no services are requested on the secondary radio access network; wherein the method includes the network system performing at least one of a circuit-switched handover and a packet-switched cell switch of the user equipment (160, 161, 162, 163) from the primary access network to the secondary access network based on registration of the user equipment (160, 161, 162, 163) with the secondary access network; wherein, in the non-active state, the user equipment is only registered with and does not receive any network-originated services or data from the secondary access network prior to the circuit-switched handover / packet-switched cell switch to the secondary access network. managing a state of each of a plurality of radio access networks (110, 120, 130, 140, 150); maintaining an indication of available services of each of the plurality of radio access networks (110, 120, 130, 140, 150); engaging a primary access network of the plurality of radio access networks (110, 120, 130, 140, 150) in an active state with a user equipment (160, 161, 162, 163); registering the user equipment (160, 161, 162, 163) with a secondary access network of the plurality of access networks in a non-active state, wherein registering the user equipment (160, 161, 162, 163) comprises: attaching the user equipment (160, 161, 162, 163) with the secondary access network; activating a packet data protocol context with the secondary access network; registering the user equipment (160, 161, 162, 163) with an Internet Protocol Multimedia Subsystem on the secondary access network; and informing the Internet Protocol Multimedia Subsystem that no services are requested on the secondary radio access network; attaching the user equipment (160, 161, 162, 163) with the secondary access network; activating a packet data protocol context with the secondary access network; registering the user equipment (160, 161, 162, 163) with an Internet Protocol Multimedia Subsystem on the secondary access network; and informing the Internet Protocol Multimedia Subsystem that no services are requested on the secondary radio access network; wherein the method includes the network system performing at least one of a circuit-switched handover and a packet-switched cell switch of the user equipment (160, 161, 162, 163) from the primary access network to the secondary access network based on registration of the user equipment (160, 161, 162, 163) with the secondary access network; wherein, in the non-active state, the user equipment is only registered with and does not receive any network-originated services or data from the secondary access network prior to the circuit-switched handover / packet-switched cell switch to the secondary access network.