iOS 6.1.2 update on iPhone 4 has made it unable to turn on.
iOS 6.1.2 update on iPhone 4 has made it unable to turn on, I have plugged it into the computer and mains but nothing. Please help. I have been constantly pressing the on/off button on the top of the phone for the last hour and nothing has done anything.
iPhone 4 (8GB), iOS 6.1.2