GSM Device Compatibility Check (VoIP Plans)

This content applies to older, Standard SIM cards

Devices that are compatible with AT&T and T-Mobile are generally GSM devices. Some devices, like newer, unlocked iPhones, are compatible with all networks as they support both GSM and CDMA.

The networks our devices run on offer the largest GSM coverage in the US. This network works with most AT&T-compatible, T-Mobile compatible, GSM unlocked and CDMA LTE unlocked devices. Click here to learn what unlocked phones do. 


What devices will NOT work with this service?

Even though we work with all different types of devices, some exclusions apply. These include:

  • Devices reported lost or stolen
  • Devices reported for fraud
  • Devices under an existing contract with another carrier or if funds are still owed to your old carrier so they block the use of your phone with us.

Important Note: There is no device compatibility check required for GSM activation, however, if your phone falls into one of the categories mentioned above, some or all services may be affected when using UNREAL Mobile.