How do I unlock my Nokia Lumia 1520 phone after upgrading to Windows 8.1?

[Windows Central Question]

how do i unlock my Nokia Lumia 1520 phone after upgrading to windows 8.1

i upgraded my Nokia Lumia 1520 from windows 8.0 to windows 8.1 and i can not use the phone anymore because its permanently on flight mode and i can't connect to my mobile Network. please i wan't Solution to solve this problem.

 

[sheldon cohn]

Re: how do i unlock my Nokia Lumia 1520 phone after upgrading to windows 8.1

Can you reset the phone to default? Then reload with your Microsoft account. You'll be asked to
get a text message or phone call to get a code, once you get the code, you'll need to enter it, so
the phone can get restored.

 

[RumoredNow]

Re: how do i unlock my Nokia Lumia 1520 phone after upgrading to windows 8.1

Try this trick: http://forums.windowscentral.com/nokia-lumia-1520/299878-3.htm#post2853178