Hey everyone. First time poster here. I've had my 551 for almost a year and for the last month or so it has has begun restarting about when I slide the keypad out about 10% of the time. Over the last week it has become significantly worse, restarting almost every time I go to use the keypad. I've also just discovered that it doesn't do it when it's plugged into a charger. This leads me to assume that somehow the sliding action is disrupting the power supply from the battery to the phone. I'm almost certain that this is a hardware problem, but I'm holding on to the slim hope that there maybe some software tweaking I can do to fix it. Anyone encountered this before, or have any idea how to fix it? Cheers.