Friday afternoon my cell phone began claiming "no signal" just as I was arriving at Princeton, NJ and in the middle of a thunderstorm. Ever since the message has been the same: No signal. Today I rebooted the phone and now the message is "No SIM." I reseated the SIM and restarted, still no luck. The back of the SIM looks sort of burned, although that might be normal. In any event, the net result is that I don't have a working phone presently; I'll visit the T-Mobile store Tuesday to see what they can do.