Hi friends this information helps you for lock and unlock through fingerprint on your WhatsApp application. So lets start step by step.
1. Open application on the above right corner click 03 dots for proceed for settings menu.
2.open Settings
3. Click Account settings
4. Click privacy settings
5. Go to last option Fingerprint lock
9.Then the option show enabled immediately
10.when u again start the WhatsApp ask for fingerprint
11. When you promt the fingerprint the application opened.
The above information are helpful so comments me.
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