1. GunplaGamer's Avatar
    I have a AT&T unlocked Lumia 920, but I just sold it on eBay so I reset the phone to delete all my stuff. I wanted to make sure the phone was still unlocked so I did the keycode for unlocking the phone ##7820# which worked before i reset it, now it just shows a blank screen. I just want to make sure the phone is still unlocked before i send it out. The phone does have 13 updates, but I don't really think this effects that. I don't want it to download any of my info to the phone so I don't want to sign into the store.
    10-04-2013 11:26 AM
  2. sutimcon91's Avatar
    I'm pretty sure that after you entered the code, the phone will be unlocked permanently.
    10-04-2013 01:59 PM
  3. homieson89's Avatar
    yes the phone will be forever unlocked. so you don't have to worry about factory resetting or hard resetting.
    10-04-2013 11:44 PM
  4. petteriusa's Avatar
    Sorry for the thread hijack, but can you unlock the phone with an AT&T code even if your original SIM card installed? I'm leaving for Europe and would like to test the unlock code before I leave.
    10-05-2013 05:42 AM
  5. alexloe's Avatar
    Without an invalid SIM (e.g. your original SIM) you have to enter ##7820# to be able to enter the unlock code.

    You will see a closed padlock icon and after a few secons you can enter the 20 digits.
    10-05-2013 06:54 AM
  6. petteriusa's Avatar
    Thanks, I had to remove my AT&T SIM and enter the code with no SIM. It took a minute or two but it took the code and then it shows an "unlocked" lock and SIM card image, so fingers crossed that's it!
    10-05-2013 10:09 AM

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