What the title says... been beating my head against this all afternoon after spending another chunk of money on another phone to get around the fact that the one I had from AT&T wouldn't allow OEM Unlocking because it was carrier-locked.
People seem to have a bunch of random issues with updates, different versions, patterns of factory resets, etc.-- and they don't work universally?
It just says 'connect to the internet or contact your carrier', and the option is grayed out in settings. :(