hy i have a iphone 3g and the power button is broken i wantit to update but i took out the usb cable from the pc and the iphone doesnt turn on and the itunes and pc doesnt see the phone.What to do pls help
Sounds like the power button needs to be replaced. You could either do an out of warranty replacement thru apple for $149 or check locally if someone can replace the button for less.