Iphone 4s wifi freeze ios 8.1.3
a few days ago, my iphone4s was in ios 7.1.2 having wifi connection problem , like wifi drop off after connected 1 min. i even try the method in apple suggest like
-put on airplane mode
-restore all the network setting
i thought it was ios problem so i upgraded it to ios8.1.3 but same problem still occur but even worst now is freeze .i even try to recovery my iphone but still the same .
wat solution can i do ? x.x i would like to downgrade it back to ios 7.1.2
iPhone 4S, iOS 8.1.3