In the U.S., AT&T and T-Mobile are GSM carriers. Contrast with CDMA phone. See GSM. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

"Carriers want to remain flexible ... "You don't need a lot of functional integration between the two GSM and 802.11 there, as Wi-Fi is already in there, almost as part of the specification ...

technology to enable seamless handover between GSM and Wi-Fi networks. Orange will be one of the first carriers to offer the handset, according to Nokia. UMA is a specification developed by ...