T-Mobile Device Unlock app

Device Unlock is an Android app that allows you to request and apply a mobile device unlock directly from the device. There is no Apple iOS version of this app available.



What you can do with the T-Mobile Device Unlock app

  • Request a Mobile Device Unlock without calling Customer Service.
  • Automatically apply a Mobile Device Unlock to the device without using a manual code.



What you need to use it

  • A T-Mobile account
  • A T-Mobile Android device with the latest software, that supports the app
  • T-Mobile network coverage or a connection to a Wi-Fi network


How to use your app


Request a mobile device unlock

  1. From the app list, tap Device Unlock.
  2. Tap Continue.
  3. Wait while the device connects to the server.
  4. Choose the desired device unlock type:
    • Permanent Unlock
    • Temporary Unlock: Temporary unlocks must be performed with a mobile data connection and T-Mobile SIM. You can't do a Temporary Unlock when connected to Wi-Fi.
  5. Wait while the device requests the unlock.
    • If successful, restart the device to apply the settings. This step is not required for the Sony Xperia Z3.
      • Permanent Success
      • Temporary Success
    • If you do not restart the device, you will have a persistent alert in the notification tray.
    • If you completed a Permanent Unlock, the applications disappear from the device app list.
    • If you completed a Temporary Unlock, you must wait for it to expire before attempting a permanent unlock.


Temporary unlock expiration

  1. When a temporary unlock expires, you receive an expiration message.
  2. Tap OK. If a non T-Mobile SIM card is inserted, the device reboots.



  • The T-Mobile Device Unlock app comes pre-installed only on supported devices.
    • The app is not listed in the Play Store, if the app was installed on a device before, it may appear in My apps & games > Installed. But you cannot install the app from this location.
    • If the app is not listed, make sure it is not disabled or hidden on the device. The app will uninstall itself after a permanent unlock.
  • If you are having trouble unlocking your device with the app, please contact us to request an unlock code and steps to unlock your device.


If you're running into problems with this app, check out our troubleshooting tips.