Originally Posted by
Priceless Luigi Thank you for the help. Man, didn't expect the phone to be relocked. Do you know ways to unlock it?
You need the unlock code from the carrier (AT&T).
Either go to the Online Unlock portal (under OLAM), but you have to be a current (or recent) customer.
Alternatively, call AT&T Customer Service (611) & talk to a CSR about your issue.
Possibly, Swappa can retrieve the unlock code from the seller.
There is also an unlock site on eBay (from Spain) which
claims to unlock your Lumia 1520, though I can't recommend it.