It's easy to set up call forwarding on your iPhone so incoming calls are directed to a different phone. The method you use to set up forwarding depends upon the your cellular carrier. GSM carriers ...

While the best unlocked phones almost certainly support GSM carriers like AT&T and T-Mobile, it’s best to look for devices that work with all the major U.S. providers, including Verizon.

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.

This tri-band GSM phone features GPRS high-speed data ... This phone is not currently available from any major US carrier. It is compatible with at least some US networks, and may be available ...

The feature-packed GSM phone includes Bluetooth ... This phone is not currently available from any major US carrier. It is compatible with at least some US networks, and may be available unlocked ...

US mobile carrier MCI has been awarded a GSM network contract in Iraq ... MCI played a role in getting a similar mobile phone network into operation in Afghanistan. — (menareport.com) ...