I'm having trouble with my App Store on my iPhone 4S?

On the App Store when I go to log in at the bottom of the page, it says unknown error. I don't know what to do, apple support UK is closed at the moment and my provider O2-UK isn't giving me and help what so ever, so if anyone has a suggestion or know what's wrong please help…

Try resetting the phone (hold standby and home button at same time for a few seconds) and it will do a little reset, YOU WON'T LOSE DATA, if that don't work try turning aroplane mode on for 10 seconds then off

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