No signal bars or a "no service" error means no connection. We want to fix that.
Before you dive too deep into troubleshooting, make sure of the following:
Your line is active.
You're in a covered area.
Airplane mode is off.
Wi-Fi Calling is turned off. If the problem happens when Wi-Fi calling is on, see Wi-Fi Calling problems instead.
The copper plating on your SIM card has no chips or discoloration. If it does, contact us from a device that has service if you have one, or visit a T-Mobile retail store for a replacement.
If your device meets the criteria above and you still have no signal, proceed with the troubleshooting steps below.
Tip: If you need help with any of these steps, visit our Device tutorials page, select your device, and use the search bar in upper right to find what you're looking for.
- Restart your device and check for signal bars.
- Change Wi-Fi Calling preferences to Cellular Preferred or Cellular Only to prevent Wi-Fi Calling issues from interfering with the signal.
- Turn off Wi-Fi to make sure you're using T-Mobile network.
- Set the device Network mode to Auto.
- Remove any cases or covers from the device.
- (Apple only) Reset network settings (tap Settings > General > Reset > Reset Network Settings) and verify the "T-Mobile Carrier Settings" are up-to-date. You can do this over Wi-Fi. See Update your carrier settings on your iPhone or iPad - Apple Support
- Update the device software to the latest version.
- Perform a manual network selection to look for networks your device can connect to. If you see:
- Registered to T-Mobile network, but no signal: The problem is likely low or no coverage. If the coverage map showed good coverage, try switching to 2G or turning off LTE.
- T-Mobile network is not available: The problem is likely no coverage. If the coverage map showed good coverage, perform a master reset.
- T-Mobile network is available but cannot connect: We'll need to check your SIM card when you contact us.
- Network selection gets stuck or gives error: Perform a master reset. If that doesn't help, we'll check your SIM card when you contact us.
- Check for signal.
Still need help?
If the phone still has no signal bars or shows a "no service" error after you've worked through these troubleshooting steps, contact us from a device that does have service, or visit a T-Mobile retail store.
If you're not receiving service where you expect to, let us know.
- No service where you've had it previously: Restart your device. If that doesn't help, follow the troubleshooting steps above to take care of any other potential problems. If you're still experiencing issues, contact us from a device that has service if you have one, or visit a T-Mobile retail store to report the problem.
- Coverage where you are has always been poor: Visit https://howmobileworks.com from an area where you have coverage and sign our petition to tell local planners and decision makers that you support our network enhancements.