My iPhone 4s slipped out of my pocket at a bar during the Super Bowl and I didn't notice until I was half way home and when I went back, it was gone. Luckily I have Find My iPhone on or so I thought. I have AT&T and I think the thief took out the sim card because I am not getting a location. If he/she doesn't turn on airplane mode, will I be able to track its location when he/she gets on wifi or plugs it into a computer?