How to get faces on the keyboard of an iPhone 3GS?

How do you get faces on the keyboard of an iPhone 3GS?

Go to AppStore, search "emoji", download it,
Go to settings, go to general, go to keyboard, go to "keyboards", add emoji, now you can have smiley face, you're welcome

The easiest way is to go to general--> keyboards--> select add keyboard --> find emoji. Hope this works