I bought the Motorola V9 from ebay and have used it for a about half a year. Last week, I found my phone always shuts down by itself and need to reboot it manually. And a few days ago, the problem became worse. When i was talking on the phone, it suddenly made noisy screaks and then the phone died. This problem also happened to SMS messages and photo taking functions. In the beginning, I thought it might be caused by software problem, so I update the system software on the Motorola official website, but when i tried to start up the phone, the motorola logo appeared on the displaying screen and blackout in a second or to. I can't start it up any more.

Cell Phones - Motorola Mobility - MOTO - MOTORAZR2 V9 Cellular Phone