Why won't my iPhone 4 use the internet?

It's connected to the Wi-Fi, ask to join networks is off, all restriction on the actual Wi-Fi hub itself are switched off, I can see all of the details of my Wi-Fi hub, so basically everything is perfect, the phone works fine, I can call text etc. But I can do nothing! I can't log in to the App Store, I can't surf the web, I can't download apps, basically the whole point of having internet on my phone is gone (the sim is new and works fine)

I think your router is blocking the phone. Check with the settings and make sure UPNP is enabled.

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