Q: My iPhone freeze with grey screen and then restart alone. Thereafter the Wifi is unavailable, I have to complete restart manually. ... more
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Mar 15, 2016 1:45 PMby sterling r,HelpfulHi there Turco911,
It sounds like your screen is going gray then turns off on its own, and you have to restart it manually to get the wifi to work again. I would backup your device to iTunes, then restore it as new and verify that it works.
How to erase your iOS device and then set it up as a new device or restore it from backups
If it does, then restore your backup to either verify it still works and the software just needed reinstalled, or isolate the issue to the backup file itself.If when restored as new the issue persists I would seek service for your phone:
iPhone Repair - Apple Support
Thank you for using Apple Support Communities, all the best!
