How to turn off the password and other security systems on an Android device

To turn off the password on an Android phone or tablet, start the Settings app and go to the Lock Screen controls page.
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Here's How I Lock WhatsApp With Fingerprint or a Password

To lock WhatsApp on Android, launch the app, tap the three-dot menu, navigate to Settings > Privacy > App Lock, and turn on "Unlock With Biometric." To lock WhatsApp ...