IOS 7 on Iphone 4? Why isn't it working?

When I go to settings<general<Software update it says IOS 6.1.3 Your Software is up to date.
I read online that the iphone 4 can get ios 7 so what's happening? Can i get the update?

Contrary to popular belief, iOS7 is NOT available on iphone 4.it is only supported from models 4s-current. Sorry.

I'm sorry, it can't, you may have seen 4s to 4, because of that iphone 4 is useing 3g, you can jailbreak your phone and get ios 7 though while ios 7 can't jailbreak. I suggest buying new iphone 5c, its colorful, cool and cheaper while having same features as iphone 5. Its only $99

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