Mobile Device Unlock: T-Mobile Concord II

Learn how to use the Mobile Device Unlock code of the T-Mobile Concord II.



SIM unlock phone


Important: Stop if you receive an error message. The device may lock permanently if you enter the incorrect code multiple times.


  1. Determine if devices are eligible to be unlocked: Mobile Wireless Device Unlocking.
  2. Contact Customer Care to request the Mobile Device Unlock code for your phone.
  3. Turn on the phone with the blocked SIM.
  4. The phone displays a screen to enter the unblock code.
  5. Enter the unblock code.
  6. Tap OK.