Three Steps To Fix iPhone 8 Plus WiFi Not Working /Won't Turn On Problem - YouTube
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iPhone 8 Plus. My Wi-Fi is greyed out and is not working. - iPhone 8 Plus - iFixit
WiFi broken/ “greyed out” on IOS 14 iPhone 8 after restart. Tried resetting network settings with no luck. Already reported to Apple but very annoying as I rely on WiFi for internet