ive noticed that on my XS Max, the WiFi is absolutely terrible! It connects ok, shows full signal but it only works for so long then just hangs and I have to turn it off and use 4G for a while. It’s terribly slow and these hanging episodes get ridiculous. I have tried with several routers and even different houses and business connections and they all act the same. Could a restore help this? I would take it into an Apple Store but I just know they’ll blame the crack I have in the corner and I do not fancy the £300 odd they want to charge to replace it.