Open your iPhone’s Settings. Tap General. Scroll down and tap Keyboard. Make sure Emoji is displayed here. If it isn’t, tap Add New Keyboard and then tap Emoji.
If WhatsApp opens to a conversation, first tap the “Back” button in the top-left corner of the screen.
You can also tap the pencil-and-pad icon in the top-right corner of the screen to formulate a new message.
If you’re starting a new conversation, first tap a contact’s name.
If the Emoji keyboard is the only additional keyboard you have, this icon resembles a smiley face.
If WhatsApp opens to a conversation, first tap the “Back” button in the top-left corner of the screen.
You can also tap the “New Message” button in the bottom-right corner of the screen and then select a contact to start a new conversation.
