Final answer:
To turn on the emoji keyboard on an Android device, go to Settings > System/General Management > Language and Input > Virtual Keyboard > Manage Keyboards, and toggle on the Emoji Keyboard option.
Step-by-step explanation:
If your Android device does not have the emoji keyboard enabled by default, here is how you can turn it on:
Go to the Settings menu on your Android device. Scroll down and tap on 'System' or 'Language and input'. Select 'Virtual keyboard' or 'On-screen keyboard'. Tap on 'Gboard' or the keyboard app you are using. Tap on 'Preferences' or 'Languages'. Look for 'Emoji' or 'Emoticons' and enable it.
Once enabled, you can access the emoji keyboard by tapping on the emoji icon on your device's keyboard.