To use emoji on an iPhone, all you need to do is enable the built-in emoji keyboard in your iOS operating system. Apple has made emoji keyboards available for free on all iPhones since the iOS 5.0 operating system was rolled out.
How to Add Emoji Keyboard on iPhone – Complete Guide
Once activated, the built-in emoji keyboard will appear at the bottom of your smartphone’s screen, where the regular keyboard appears when you’re composing messages. Only, instead of letters, the emoji keyboard displays rows of small cartoon-like images known as “emoji,” or smiley faces.
To enable the emoji keys on your iPhone:
Open the Settings app and tap General.
