**NEED TO UPDATE WHATSAPP **
Recently whatsapp introduces new security feature for its user where user can use fingerprint lock in whatsapp now this feature is also available for android user before a month this feature was only for iphone users but now on this update all the android users who are using fingerprint phone they can use this feature just follow steps below..
- Open whatsapp and click on 3 dot menu button and click on setting .
- Click on account option .
- on next screen click on privacy.
- and than on last option you will see Fingerprint lock option click and set option of your choice .
Below Is the easy way to understand it !