Hello there, So I got a USED Galaxy S4 from someone on kijiji The phone is from rogers, and still locked to rogers/chatr Iv been using the phone for about two weeks with no issues at all. Last week, just in the middle of the day I was taking the phone out of my pocket, and I noticed that it says ' unregistered sim' On the lock screen and status bar Tried to restart the phone and pull out the battery, nothing happened. Tried a NEW chatr sim card- no luck. Went to rogers yesterday, tried 4 different sim cards Didnt work. I stuck with the "unregistered sim" msg, which not allows me to use the phone. I tried to look for an answer around the net, and couldnt really find someone who have a similar issue. Any ideas? Is the phone might be stolen? Is therr anything to do about it? Thank you!