Iphone 4s Wi-Fi problem? Anybody else have this problem?

So i have an iphone 4s from bell canada. Its a great phone but i have a problem with my Wi-Fi.
when i turn my Wi-Fi ON it will work fine. But after 4 or 5 minutes continuous working, it will stop working.
and i have to turn it OFF and then turn it ON again for later browsing.
i can't even see the full length youtube video of 5 minutes, because it will stop working in the mid of the video
any help

Install gentoo

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