One of the weirdest trick is to change your friend’s profile picture on WhatsApp by using an amazing prank to trick others. This is how to go about it.

• Select a profile picture for your friend’s profile.
• Resize the image to 561×561 pixels using paint and name it with you friend’s mobile phone number.
• The image will be then saved in SD or greeting card WhatsApp and finally Page Pictures.
• Overwrite the current file (if necessary) and disable Wi-fi and data network.
• WhatsApp will automatically start using the new picture.

Note: This may not be a hack or malicious activity, but just a prank to change your friend’s profile picture from your device.  Thus WhatsApp for fun.