So, I have this iphone 3gs that I got from a friend for free. It was hers for two years, and she was the last to have service on it. I have had it for a year, and when I recieved it she had already let the service run out. At no point in time since that point has the upper left hand corner of my device said anything but "no service." So today I was doing some incredibly personal stuff of my phone, and out of nowhere it showed one bar of service. I quickly turned location services off, and it returned to no service. My question is, is it possible that: A) Someone, somewhere, is trying to track this phone. Or B) Some random data is being distributed to apple or another establishment whether by a back door in the software or by way of my phone being hacked. Or C) Graphical glitch? Thanks in advance.