Patent ID: 8868075

Claim:
A communication system, comprising: a single-mode modular cell phone, comprising: a baseband modem for connecting to a core mobile network via a cellular network; an unlicensed mobile access client for executing a mobile access protocol; and a connector for physically attaching the modular cell phone to a port of a mobile electronic device; and a mobile electronic device, distinct from said modular cell phone, comprising: a modem for connecting to the core mobile network via an IP access network; a port for physically attaching said modular cell phone; an unlicensed mobile access client comprising an IP security module; an attachment detector for detecting that said modular cell phone has been physically attached to or physically detached from said port; an access point scanner coupled with said connection detector for responding to said attachment detector detecting physical attachment by determining if a wireless access point is within range; and a connection enhancer coupled with said access point scanner for responding to said access point scanner determining that a wireless access point is within range by receiving a connection of an ongoing cellular phone call, between said modular cell phone and the core mobile network via the cellular network, and seamlessly handing over the ongoing cellular phone call to a voice over IP connection, between the mobile electronic device and the core mobile network via the IP access network and via a mobile access network controller.