Windows 10: MY phone locked by company due to un paid how can I unlock

My phone locked how can I unlock

:)

 

Unlock Phone

I have a Problem with my nokia lumia 520, I bought at amazon for AT&T gophone (prepay), I import the phone to Venezuela, but I can't use it because is locked to use with AT&T company, I try to unlock with one unlocker company (doctorsim) but doesn't work,
they say something like the imei number can't be found in their database list... so, I can't use my phone, AT&T don't give me the unlock code, and with an unlocker company I can't do that, so... what it suppost there I can do? nokia could give me that pin
to unlock my phone?

 

Looking for an unlocked phone to test on


I've started programming in Visual Studio 2015 under Windows 10.

I'd like to get an unlocked phone to test with.

I saw a whole bunch of unlocked phones on Amazon.

Any suggestions as to what phone would be best for that?

Thanks.

 

Nokia 928 lock/unlock feature

Hi,

I have a Nokia 928. I have a lock screen activated. When I hit the side button to unlock my phone, there is no response. If I hold the volume down button long enough to prompt to turn off, then I am able to swipe up and unlock my phone using my code.
At this point, the following occurred:

• if I hit the lock button my phone will not respond.
• If i hit the volume up while the phone is unlocked. It states that "Something has changed...hold the volume up button and the lock button to take a screen shot."
• If I touch the volume down button, the screen will prompt "shut down" by swiping down.

The battery is fully charged. Do you have any suggestions on how to fix this issue?