I'm having Wi-Fi problems with my iphone 4s?

So for awhile now my Wi-Fi on my iPhone 4s hardly ever works anywhere that I go. And finally when it does connect sometimes it only works for like five minutes. And sometimes when I turn my phone off and back on it won't even let me slide my Wi-Fi on so I have to keep restarting it until it lets me turn it back on… And even then it still hardly connects to anything. It isn't jailbroken and hasn't been. I've tried to reset my network settings but still it doesn't work. This really aggravates me and I would love to fix it! My data's always up halfway through the month and then my Wi-Fi doesn't work… Thanks for any help.

Have you tried re-booting the router. I had a similar problem with a Kindle (just stopped working one day). A re-boot sorted it.

Go to settings --> General---> reset --->reset all settings

don't worry you won't loose your stuff it just reset changes you made to the settings back to normal.

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