Step 1: Download Bitmoji – Your Personal Emoji from play store.

You can also use your Snapchat account if setup Bitmoji in Snapchat.

Step 2: After downloading the app, install it in your android devices.

Step 3: Go to settings in your android device.

Step 4: Tap System settings.

Step 5: Tap Language & input.

Step 6: Tap Virtual keyboard under the keyboard & input section. Next you choose GBoard as your default keyboard.

Now open WhatsApp

Step 1: Open the WhatsApp app in your android device.

Step 2: Tap contact you want to send Bitmoji WhatsApp.

Step 3: Tap & hold the Emoji icon on the Google keyboard.

Step 4: Tap the Bitmoji icon and choose the Bitmoji you want to send.