Wifi gets grey and it doesn’t work on iPhone 8

Kenziemuhamed wrote: "It’s 78"

78% is not healthy and is to be expected in an original iPhone 8 Plus battery. Apple suggests replacing the battery when it's around 80% or less. So have the weak, aging battery replaced and your Wi-Fi will (probably) return to normal:

iPhone Battery & Power Repair

About genuine iPhone batteries

Repair Provider Verification

(Articles found by searching Apple's Knowledge Base.)

õ¿õ¬

Kenziemuhamed ~ Does your iPhone 8 Plus still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

õ¿õ¬