Open Whats app, click on the three vertical dots on the upper right, go to "Settings" and select "Chats"
In the new tab, under Display, select the option "Wallpaper"
Click on the option "Solid color" in the popup window
Choose your favorite color from the available options and click on "Install"
Select "Gallery", find the desired photo or image from your photo gallery, adjust, and click on "Set"
Download the latest version of WhatsApp by clicking on this link and chat with friends in original chat rooms!