Faster Answers

The Wifi-Field in my iPhone Settings is grayed out and it says no wifi. Does anybody know how I could repair this?

From what I’ve heardI think this can acually be a harware issue. Some maybe have the wrong baseband and bootloader for the firmware after unlocking which can cause it to overheat. I’ve heard that the phone has sensors for this and may turn those components off leading to the greyed out wifi. If you have done any unlocking you may try to find out how to erase your baseband and restore, so you have matching iphone firmware and baseband again.

If the restore fails to enable the field for the on/off for wifi, it will narrow down simply to a hardware failure on it. It will likely require a communication replacement.