Selecting transparently a proper network connection for voice communication will be a fundamental requirement in future multimode heterogeneous wireless network. This paper presented a smart session selection (S³) scheme to meet this requirement. Instead of selecting a best access network as in conventional Always Best Connected (ABC) paradigm, S³ enables users to select a best network connection, which consists of source and destination access network pair, to satisfy quality constraint and users' preference. To support S³, we develop a user profile to specify network connection priority. Meanwhile IP multimedia subsystem (IMS) is extended to make smart decision for users. Finally, Analytic Hierarchy Process (AHP) is used to recommend a network connection with assistance of user profile and IMS signaling. An example is illustrated to show that AHP can successfully select a good network connection that fulfills the requirement of users.