GSM Standard for WiFi and Bluetooth Compatibility

sjbe writes "Fourteen of the major wireless service providers have released a set of Unlicensed Mobile Access (UMA) specifications permitting operation with licenced GSM and unlicensed (WiFi/Bluetooth) spectrum. So if we're lucky we might soon be able to use a GSM cell phone through a wireless base station and experience a seemless handoff to a cellular network once out of range."