Learn how to troubleshoot problems with connecting to 3G, 4G, or LTE.
When you use a device in a 3G, 4G, or 4G LTE area, the device automatically scans for the best available network to which it can connect. If the device has signal bars but does not show a data connection next to the signal bars, you may need to look into coverage and device settings.
To fix this issue:
- Check the device settings: (If you need help, look up the instructions or Tech specs for your phone in Devices)
- Your device must support 3G, 4G, or 4G LTE.
- Data roaming is turned on.
- Wi-Fi Calling preference is set to "Cellular preferred."
- Network mode is set to "Auto."
- Your phone has the latest software version.
- Your SIM card is inserted correctly in the device.
- Open the Coverage Map, and check that the address is within T-Mobile 3G, 4G, or 4G LTE coverage.
- Turn off your device.
- Remove the battery, and re-insert it.
- If the device doesn't have a removable battery, press and hold the power button and volume down button for up to 15 seconds, until the device resets.
- If you're unsure whether your device has a removable battery, check out your device on the Devices page.
- Turn the device back on.
- If you still cannot connect to 3G/4G/LTE, perform a manual network selection. (If you need help, look up the instructions for your phone in Devices)
- Check another T-Mobile device (if available) in the area to see if it is connecting to 3G, 4G, or 4G LTE.
- If the problem continues, please contact us for additional troubleshooting.