To set up a custom wallpaper for an Android WhatsApp chat, here’s what to do:
Access the chat window by pressing the name of the contact.
Click the 3 dots on the upper right of the conversation and choose the wallpaper.Select the option from the options provided
Then choose the “For This Chat” option and then tap the “OK” button.
You only set up a wallpaper for a personal conversation this way. If you’d like to set up the default wallpaper for all your conversations. If you’d like to set up the default wallpaper for all your conversations. Go to, WhatsApp’s settings via an icon in the lower right corner of the screen. After this, touch Chats, and then Chat Wallpaper, then you’ll going through the same process to pick up a wallpaper.