Establishing and controlling communication to and from a mobile terminal with multiple network interfaces that can be reached with one phone number via multiple networks. The mobile terminal simultaneously communicates with a central server over a cellular network and a WLAN to dynamically coordinate a preferred routing of a communication session with a partner node. The communication session is routed over whichever network is optimal at any given time, depending on a current location of the mobile device, current performance of each network, and other criteria. A new communication session is established through the central server to enable one number access to and from the mobile terminal. An ongoing communication session is continuously monitored to determine whether and when to perform a network handover. The mobile terminal obtains performance data regarding each network and arranges a network handover with the central server.