How to put 4G on my iPhone 4S?

How do i put on 4G on my iPhone? I have an iPhone 4S and it has the iOS 6 update. At the top left is says 3G, I know it's capable of 4G but how do I turn it on?

Your iPhone is not capable of doing LTE data speeds if that is what you are asking. You do have 4G speeds if you are running on AT&T network, it will show up if you are in a supported area automatic.

Sorry, iPhone 4S is not capable of 4G.

The only iPhone with "4G" capability so far is the iPhone 5.

A common misunderstanding about the iPhone 4 and the iPhone 4S is that since there's a "4" in the name, that there has to be 4G capability. To fit an iPhone 4/4S with "4G" capability would require that the phone be taken apart and re-engineered, something that would cost far more to do than it would be to simply buy a new iPhone 5.

Only the att iphone 4s has 4g.

The AT&T iPhone 4S has "4G".It's technically dual band 3G though. All that means is it goes faster than regular 3G, but not anywhere near as good as 4G LTE. The iPhone 5 brought full support of 4G LTE to the iPhone on all 3 major carriers in the USA.So, unfortunately, you're stuck with 3G.