iPhone 4S iOS7 & iOS7.1 WiFi either drop after a minute on any networks or "unable to connect"
I was on iOS7, without any change on the phone or router, one day I couldn't connect to my home WiFi anymore or any other WiFi networks. At the beginning it can't connect to any network net all showing the message "unable to connect". After a week or two, I started to be able to connect but still drop every minute and barely able to send/receive data. Knowing that other comps or iphone can connect to my home WiFi without problem.
The I updated iOS to 7.1, but WiFi still reacts the same way.
Already tried every level of reset on my iPhone, including completely wipe the phone or static IP setting but the problem is still there. Also reconfiguration the router , already reinitialize, change to specific SSID/password, change channel, set specific MAC address but seem to solve the problem.
Who ever experienced this EXACT SAME PROBLEM, please tell me how you solved it.
iPhone 4S, iOS 7.1