why isn't my iphone 4 turning on after i got the ios 6 update?
,y phone wont work
iPhone 4, iOS 6.1.2
Perform a Reset...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430
If no joy...
Connect to iTunes on the computer you usually Sync with and “ Restore “...
http://support.apple.com/kb/HT1414
If necessary Place the Device into Recovery mode...