Abstract: A method, non-transitory computer readable medium, and device that optimizes establishing connections to and facilitating offers of roaming services, the method includes adding, by a diameter roaming gateway controller device, a domain name of a packet data network gateway in the home network system to an update location answer received in response to an update location request from a home subscriber system in a home network system associated with a roaming mobile computing device. The update location answer is sent, by the diameter roaming gateway controller device, to a mobility management entity in a visited network. Redirect information is added, by the diameter roaming gateway controller device, to a credit control answer received from the policy charging and rules function element in the home network system in response to a credit control request message generated by a packet data network gateway in the home network system.