Straight Talk Sim Card Not Working In At&t Phone. SIM card will only work with an ATT compatible or unlocked GSM phone. Try rebooting your device in Safe Mode to see if there is a hardwaresoftware issue with the phone.
Please take the SIM card out use Tray Eject Tool if needed and restart the phone. If the above two steps doesnt solve the issue and you are still not able to send receive or Download MMS on your Straight Talk Phone you can try downloading the GO SMS Pro APP which seems to solve the issue for many people having this problem. Have you attempted to reseat the SIM card.
Why Straight Talk Internet Not Working.
Check if the handset is able to detect the SIM card or not. 4G4G LTE5G networks require a capable device and SIM card. Straight talk SIM Card will only work with an ATT or T-mobile compatible or unlocked GSM phone. Why Straight Talk Internet Not Working.
