The company offered service under the Cellular One brand in most regions. Although originally a TDMA carrier in most areas, the company migrated to GSM technology.

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.

One of the smallest GSM phones in the world ... This phone is not currently available from any major U.S. carrier. It is compatible with some U.S. networks, and may be available from third ...

Introduced in 2008, the Storm was a dual-band phone that supported both CDMA and GSM carriers. The original Storm touchscreen featured SurePress technology, which required an actual depression of ...

Even if the iPhone can work on other “unofficially supported” GSM networks, FaceTime is still tied to specific carriers selected by Apple and can’t get activated by standard unlocking tools. MiTime is ...

There is no pull from carriers or phone manufacturers for a fully integrated ... "You don't need a lot of functional integration between the two GSM and 802.11 there, as Wi-Fi is already in ...