Want to type emoticons while writing text messages? Well, they are already built into the iPhone and I didn’t even know this for the longest time. Go to Settings, then General, then Keyboards, then International Keyboard and tap to add Emoji.
Now when you go to type, click on the small globe icon and you’ll get a whole bunch of awesome emoticons.
"iPhone Tip – Emoji Icons"
Reference : online-tech-tips.com