iOS 7 devices not connecting to WiFI
I've been having this issue for a very long time now (in fact, I faced it on the day I purchased my iPhone 5S too). On all of my iOS 7 devices (and 7.1.x for that matter), including my iPhone 5S, my brother's iPhone 4S, my mom's iPad 2, and her iPad Mini 1, all have this problem. They randomly, and simultaneously, stop connecting to the internet, and no web pages or any other internet service loads. If I try to disconnect and reconnect the WiFi, it just shows the spinning loading circle and nothing more, for hours on end without connecting.This problem tends to solve itself after a while, which can range anywhere between 5 minutes and 5 hours. This problem is in fact unique to my iOS 7-7.1.2 devices, since my old iPod Touch 4G doesn't have this issue, and my laptop doesn't have this issue.
I'll mention any solutions I've tried that failed. Rebooting iPhone does not help at all. Resetting Network Settings doesn't do anything. Restoring the phone and setting up as new works only some times, and there's really no way to tell if the Restore actually fixed it, or it just fixed itself with time as mentioned above. Rebooting the router, or switching the channel on which it operates (both of which were suggestions made by the Customer Service from my ISP) doesn't help either. I only have this issue on my home WiFi, and no other WiFi at all.
If someone thinks this could be a possible side-effect of my jailbreak or some tweak from it, I have been having this issue right from day 1, with all iterations of stock and jailbroken iOS, and my mom's iPad's have never been jailbroken at all.
Please tell me there's someone who can help here, because the problem is killing me.