TPO Mobile offers service on two nationwide 4G LTE networks for both GSM and CDMA mobile devices. While TPO Mobile service is available in most of the United States, we recommend you use our coverage check tool to ensure that service is available in your area.
What is CDMA or GSM?
Most mobile carriers either use CDMA or GSM technology for their service.
Ok, great… so how do I tell?
If you use Sprint as your carrier, you are on a CDMA network, however, if you use AT&T or T-Mobile, you are using GSM technology.