Mobile Device Unlock: Nokia Lumia 810

Learn how to use the Mobile Device Unlock code of the Nokia Lumia 810.




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. From the Start screen, swipe left.
  4. Tap Settings.
  5. Scroll to and tap about.
  6. Tap more info.
  7. Record your IMEI number.
  8. Contact Customer Care to request your unlock code.
  9. Turn on the phone with the non-T-Mobile SIM card. The device displays "Please input unlock code."
  10. The phone displays a screen to enter the unblock code.
  11. Enter the unlock code. If successful, the device displays "Phone is unlocked."
  12. 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.