I get this question alot. When Straight Talk first came out all its phones worked on the Verizon network. Slowly, Straight Talk started introducing GSM phones which kind of confused its users. People would buy a Straight Talk phone and believe it was Verizon when they were actually getting AT&T/T-mobile. So, for those uninformed how do you actually tell these phones apart? It's simple really.
- If the phone model number ends with a "C" then it is CDMA and that would mean it was a Verizon service phone. (not in all cases.. more on that below!)
- If the phone model number ends with a "G" then it is GSM and that would mean it was either an AT&T/T-mobile service phone.
- The only phones that ends with a "C" and are actually not Verizon phones are the Android line of Straight Talk phones. At this time those phones only use the Sprint network.
I hope that straightens out the issue on what service is with what Straight Talk phone.
*Note: The same idea above also works on all Tracfone and Net10 devices.