pete, Straight Talk uses all four of the major network carriers in the U.S. (Verizon, AT&T, Sprint, or T-Mobile). HOWEVER, an individual phone on Straight Talk service will only use ONE of those networks.
The phone models Straight Talk sell are predetermined to use ONE of those networks. Straight Talk makes that decision. It will use that network no matter where the phone is purchased or where you travel in the U.S. for the life of the phone while it is on Straight Talk service.
If you are using BYOP, the same applies. You will use a compatible network which will work with the phone you are bringing to Straight Talk and your phone will then use ONLY THAT NETWORK no matter where you travel in the U.S. and for as long as the phone is on Straight Talk service.
A Straight Talk phone will not bounce around using different networks in different parts of the country (contrary to popular opinion). Straight Talk phones using Verizon or Sprint will use NATIVE coverage only (which means no roaming ...service will be on Verizon-owned towers ONLY or Sprint-owned towers ONLY depending on which you are using). If using AT&T or T-Mobile on a Straight Talk phone, you may or may not have limited roaming privileges in certain parts of the country on compatible GSM networks.
answered 1 week, 3 days ago
From my research I think it is AT&T and sprint.
answered 1 week, 4 days ago