Why dosnt my internet work on my iphone?

I'm on my iphone 5 and i randomly (only when conected to Wi-Fi) can't go on the internet youtube, netflix etc… What do i do, i know its not the internet because it works on my computer. Iv tried turn off and on my phone turning off Wi-Fi and turning airplain mode on and off.

Try disconnecting then enter you sky details again scan what ever. Or whatever broadand your with

Delete the network on Wi-Fi settings then re-add it simples!

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