Ok, so I am messing with my phone trying to see what the PV32 or whatever is, and now my phone says...

SIM Network Unlock PIN HELP
>blank fill in<

If I press Dismiss it takes me to my home screen, It says I do not have a network and of course I do not have cell service

I have a Galaxy 3 unlocked phone
At&t is my service.
It is a touch screen, android.