My iPhone 5s will not turn on Bluetooth or wifi
Sincd updating to 8.3, I can not turn on Bluetooth or wifi on my 5s. Help!
iPhone 5s, iOS 8.3
Try the suggestions here to see if they resolve your problem:
http://support.apple.com/kb/ts1559
If these don't work you probably have a hardware problem. Visit an Apple store for an evaluation or contact Apple Support.