Wifi not turn on
IT will not turn on when push up in lock screen wifi sign not there
just I grey circle
iPhone 4S, iOS 9
If Wi-Fi is grayed out or dim on your iPhone, iPad, or iPod touch - Apple Support
Take a look at this Apple Support article:
https://support.apple.com/en-us/HT204051
Reset your network settings.
Settings - General - Reset - Reset Network Settings
Reset your device. This won't delete your data stored on the phone.
- Press and hold the Sleep/Wake button
- Press and hold on the Home button
- Keep holding both buttons until the display turns off and back on with Apple logo on it.
Alternatively, you may go to Settings - General - Reset - Reset All Settings