You can’t actually change your friend’s WhatsApp Profile Pic from your
phone globally but you can change it for
your phone so that whenever someone will
check it on your WhatsApp, he/she will see
your assigned profile pic for that friend. So,
it would be a great way to make fun of your friends. To do this, follow these steps:
*.Download weird-looking/funny picture that you want to assign for your friend’s
WhatsApp profile pic. *.Resize it to 561 x 561 pixels and name it with your friend’s mobile number from which he use for WhatsApp.
*.Save the image to SD card>>WhatsApp>>Profile Pictures.
Overwrite existing file (if required).
*.Now, show you friend his profile pic from your WhatsApp to invite instant panic
to his face.
Note:– Disable WiFi/Data connection so that WhatsApp will not automatically update the pic.
Comment if you need any help.