Depending on your device, either you need to go into your keyboard setting and enable Emoji (for iOS 5.0 and up), or if your device can't upgrade that far, you would need to download the Emoji app and enable it through the keyboard. Setting - General - Keyboard - International Keyboard. If you need to download it, it will also give you step by step instructions.
This is only for iOS devices - Android is different. Some people have found some keyboards that work
https://forums.teamlava.com/showthrea...ndroid...Works!