This has been a royal PITA so far (NIB AT&T, for use on Metro/T-Mobile). I've slowly fixed issues to get towards a working phone, but am not there yet. Fixed the access point entries not saving issue. Created an APN with numbers taken from my other working phone. My phone number is now back, listed under status. The wrong IMEI was there without a SIM, but went blank when the SIM was inserted. Now there is the wrong IMEI there no matter if the SIM is in or not. I also have a signal now, which wasn't the case before. I can also search for networks in the area & it returns several. No incoming calls, & outgoing calls gives me an "Emergency calls only" pop-up. It seems the issue I have left are not being able to connect to a network, which I thought might be a carrier lock issue, possibly tied to the mismatched IMEI's. That brings me to the post title. If I keypad in 2945#*980# I get to the unlock screen that says "SIM unlock process". There are 5 choices to click on, but everyone returns "Your phone is not personalized", with a dismiss button underneath that statement. Does the SIM need to be rewritten to match the one in the battery compartment?, & what to do about the SIM unlock screen?