WhatsApp finally rolled out the ability to lock individual chats in May 2023, offering an extra layer of privacy for your sensitive or important conversations. Here’s how to lock particular chats on your Android device:

Using Fingerprint:

1. Open the WhatsApp app.
2. Long press on the chat you want to lock.
3. Tap on the Chat Info icon (i) from the top bar.
4. Scroll down and select Chat lock.
5. Toggle on Lock this chat with fingerprint.
6. Confirm your fingerprint when prompted.

Using Passcode:

1. Follow steps 1-4 mentioned above.
2. Under Chat lock, choose Create Secret Code.
3. Define a strong and unique passcode.
4. Tap Next and confirm the passcode.

Now, whenever you open the locked chat, you’ll be prompted to enter your fingerprint or passcode depending on your chosen method. This adds an extra layer of security, ensuring only authorized individuals can access these specific conversations.

Additional tips:

• You can lock as many chats as you want.
• To unlock a chat, simply open it and enter your fingerprint or passcode.
• To disable chat lock on a specific chat, go back to Chat Info > Chat lock and toggle it off.
• Consider hiding the Locked Chats folder for an extra layer of privacy. Go to Settings > Chats > Hidden Chats and enable “Hide Locked Chats”.

With this feature, you can now enjoy peace of mind knowing your private conversations are protected on your Android device. Just remember to choose a strong passcode and avoid relying solely on fingerprint identification for enhanced security.

I hope this information helps!