The phone goes completely dead at random for no reason ( now happened 5 times) with no particular event precipitating the shut down. This can happen with a charge of over 50%. It will come back on, with great difficulty, after multiple various maneuvers. The maneuver that works best is when it is plugged in to the computer's USB port while you hold down the "on" button, off and on, for a long time. It's not possible to do that on the road, and is frustrating. Any other solutions?
