Got a MyTouch 4G on Black Friday at Costco (upgraded for $150 before $50 mail in rebate) and it worked great for 3 days. It charged with the wall plug and the usb cable fine Friday and Saturday. Transferred files fine from pc. Charged it via the usb cable connected to my pc Sunday night and it was just went dead. I tried charging in the wall and in the car, removing the battery, everything. No luck - it was toast. Took it back to Costco Monday and swapped it out for a new one. Everything has been cool with the new one for almost a week now. I have connected it to the pc a time or two to transfer files and charge it. One time, it acted like it was about to freeze up after unplugging it. Yes, I unmounted it in Windows beforehand. Has anyone else had any issues like this? I'm a little scared that it will die again. It has the warranty and I even got the insurance. But it is a hassle to have to go and swap it out and re-install all my stuff. Was it just a defective phone or a bad usb cable or a power surge or something with the pc?? Any ideas would be appreciated!