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 for assistance.


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