I got a used OnePlus Nord with a really good case. I want to set it up to make calls and not much else. For now I'll just keep it on its original, metro pcs, and have a really cheap plan. I checked out what they've got and they asked for the IMEI, easy to find, and sim info. Wouldn't that be in about phone? I can't find it. Somebody said to take out the sim card. I guess that stuff would be there but I don't know how to take off the case. It might not really be stuck but I don't want to break it or the phone and I don't know how to put it back.