My phone won't turn on at all. Not even when I connect it to a computer.
Try connecting to a computer in recovery mode described in http://support.apple.com/kb/HT1212 if that doesn't work it may be time to visit an Apple store genius bar to have it tested.
Another user had the same problem and someone responded that I should hold the power & Home buttons down at the same time for 10 seconds and it worked. But thanks, for your suggesstion.
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