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 entry-level, single-band GSM phone marks VTech's entry into the North ... This phone is not currently available from any major U.S. carrier. It is compatible with some U.S. networks, and ...

The [[Neo1973|Neo 1973]] and [[Neo FreeRunner]] are only [http://en.wikipedia.org/wiki/Mobile_phone phones]. They are not tied to any specific [http://en.wikipedia ...

so it's a GSM carrier as well. All you really need to know about GSM, though, is that you can forward your iPhone's number to another phone using the Settings app. 1. Open the Settings app.