Support SUPPORT
New to T-Mobile? Switching is easy Set up your device Using the app Sprint Migration Center All get started topics Ways to pay your bill All about your bill Line permissions Your T-Mobile ID Your PIN/Passcode All account resources topics T-Mobile Network In-flight texting and Wi-Fi Wi-Fi Calling International roaming Mobile Without Borders All network & roaming topics Find the right plan Neftlix on Us HotSpot plans Voicemail Use Mobile HotSpot All plans support topics Tutorials Troubleshooting Unlock your device Change your SIM T-Mobile eSIM All device assistance topics Account Hub I-Billing Home Office Internet Collaborate Line permissions All business support topics

If a SIM PIN security code has been entered incorrectly multiple times, the SIM will lock and require you to enter a PUK code to use your device again. Be careful! If you incorrectly enter your PUK code 10 times, your SIM will need to be replaced.

  1. If you get a prompt about a PUK code or your SIM being locked, Contact Customer Care to request your PUK code. 
  2. If you're prompted to enter the PUK code, enter it.
    • You may need to attempt a phone call before you are prompted to enter the code.
    • Follow the steps to create a new SIM PIN for your security. You must enter it twice.
  3. If you're not prompted to enter a PUK code, open the phone dialer and call **05*[PUK]*[New PIN]*[New PIN]#.
    • Where it says [PUK], enter your PUK code.
    • Where it says [New PIN], enter a new SIM PIN. You must enter it twice.

Was this helpful?