IPhone 4s internet and Wi-Fi problems?

I'm on 3 UK network and Since yesterday my interner keeps going on and off and even when I connect to Wi-Fi the internet won't load. I have tried switching my phone on and off and I've checked all my settings, any solutions?

It sounds to me that you have the right connection to your Wi-Fi eg the right password, but if filtering is enabled on the router than you will not be able to load the internet, I have seen that it says connected but you are not able to load anything so make sure that if any type of filtering is enabled, eg MAC filtering than make sure the MAC address from your phone is added to it, if not I would need more details.

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