Mobile Device Unlock: T-Mobile Concord

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




SIM unlock phone


The Mobile Device Unlock code allows the device to use a SIM card from another wireless carrier. This may be necessary when traveling internationally. To enter the Mobile Device Unlock code, follow these steps:


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


  1. See if your phone is eligible to unlock: 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.