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How to lock apps on your Android phone to prevent unauthorized access

Smartphones are a big part of our lives today, and the best smartphones serve as more than just phones. They hold memories ...
来自MSN

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 ...