Iphone won't let me download anything?

! Have an iphone 3gs, bought recently and it won't even let me download facebook saying it requires! OS 3.it won't let me download anything at all?

Nothing is wrong dude basically this means the phone needs updating. What you must do you first must have itunes downloaded (Link To Download At Bottom) and get the charger for you IPhone
Take out the usb and connect your iphone to your computer and open itunes most of the time it will do it automatically and your phone will switch to downloading the new update and your phone should work fine. :3 Good Luck dude

Itunes: http://www.apple.com/.../download/

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