Mobile Device Unlock: Nokia Lumia 710

Learn how to use the Mobile Device Unlock code of the Nokia Lumia 710.




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. Insert the non-T-Mobile micro SIM card into the device.
  4. Turn on the device. The phone will display a message "This SIM Card can only be used on specific networks. Contact your Customer Service Center for the unlock code. 10 attempts remaining."
    Note: If this message does not display, open the phone dialer, enter ##782#, and tap call.
  5. Enter the unlock code.
  6. Tap enter.
  7. If successful, the device displays "PIN Accepted".
  8. If you receive any error messages after attempting to permanently or temporarily unlock your device, contact customer care to inform them of the issues you are receiving.