Last night, in a next to no access zone (non-cell phone area), my Acer cell phone kept telling me I was out of range. An hour or so later, it started to buzz every few seconds. Thinking it might be out of energy, I plugged it in to re-energize. And it buzzed away all night. Now, today, whether it is plugged in or not, the buzzing continues (every other second) -- and the phone still doesn't work -- will not even turn on. What to do?