Yep, my 3650 died on me. In the last few weeks while I have free GPRS I'm 3650-less, crap. I'm not sure how it happened but it *really* just died on me. The phone will switch on and before I get a PIN prompt or that silly handshake imagery the phone will just switch off.
At this point I'm not too worried as its still under warranty and it seems as though it is a manufacturing fault, but I'd also like to know what caused it. Off to Nokia it goes