Wifi Greyed out after ios 11.4 updated

Try to Reset your Network Settings.

Go to Settings > General > Reset > Reset Network Settings. This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before, but nothing else.

if the issue is still there, install a fresh copy of your iOS11.4, resetting your device to factory settings.

Before doing it, make a full backup of your iPhone's content.

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Regards

Giulio

Hi,

Tap Settings > General > Reset > Reset All Settings

This will reset all settings and your Apple Pay cards will be removed. No data or media will be deleted

All the tricks?

Please list since we don't want to suggest anything you already have tried.

Since you have done all the tricks, there is nothing we can tell?

FWIW, my iPhone 5s, 6, 6s, 6s Plus, 7 & 8 Plus are working fine on Wi-Fi with iOS 11.4 as well as many millions others.

My iPhone 6 updated to 11.4 and now my WiFi buttons do not work. Has anyone found a fix with out factory reset?

Hi My iPhone 8 has done exactly the same thing after the IOS 11.4 upgrade. Tried absolutely everything!!

Very annoying...