On some older Samsung phones, you can customize your lock screen icons.
To add the WhatsApp icon as a lock screen icon, follow these steps:
- Go to your home screen.
- Go to Settings > Lock screen > Shortcuts.
- Tap the ChatOn Icon, and select WhatsApp from the list of applications.
The WhatsApp icon will now appear as one of the lock screen icons, instead of the ChatOn icon.
WhatsApp Support Team