Iphone 4s no wifi
I Just bought a used iphone 4s supposedly working prior receiving it.. no issues while setting up. IOS 8.1.3. Downloaded. After a few hours, drop the wifi and saying cannot scan for wireless network. I reseted the network settings which caused the wifi button deactivation and wouldn't turn on anymore.. Deactivated the wifi networking location services as suggested on a website..didn't work.. rebooted the phone to factory and set it up again. And the same story restarted.. It has been 1 week, 4 reset and same problem.
the guy that sold me the phone said he doesn't understand as the wifi was working perfectly fine.
any other suggestion?
iPhone 4S, iOS 8.1.3