Question: how to change whatsapp wallpaper for one contact android?
Answer: Open WhatsApp on your iPhone or Android device.
In WhatsApp, find and tap on "Settings."
Tap on "Chats."
Tap "Chat Wallpaper" on iPhone, or "Wallpaper" on Android.
Select an option:
Once you've chosen a new wallpaper, you'll be directed to a "Wallpaper Preview" screen.