iphone 4s update ios 8.3 but some many time aotomatic power off/shat down
my iphone is 4s
iphone ios update 8.3 and after iphone many time automatic shatdown/power off
why?
iPhone 4S, iOS 8.3
"Why"? Something went wrong during the update.
If you want to fix it, see this:
If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support