How can you block a contact on WhatsApp?

Blocking a contact on WhatsApp prevents them from sending you messages, seeing your online status, or calling you through WhatsApp. Here's how you can block a contact on both Android and iPhone devices:

### For Android:

1. **Open WhatsApp**: Launch WhatsApp on your Android device.

2. **Open Chat**: Go to the chat with the contact you want to block.

3. **Open Contact Info**: Tap on the contact's name at the top of the chat to open their contact info.

4. **Block Contact**: Scroll down and tap on "Block contact" at the bottom of the screen.

5. **Confirmation**: A pop-up will appear asking if you want to block the contact. Tap on "Block" to confirm.

### For iPhone (iOS):

1. **Open WhatsApp**: Launch WhatsApp on your iPhone.

2. **Open Chat**: Go to the chat with the contact you want to block.

3. **Open Contact Info**: Tap on the contact's name at the top of the chat to open their contact info.

4. **Block Contact**: Scroll down and tap on "Block Contact".

5. **Confirmation**: A confirmation pop-up will appear. Tap on "Block" to confirm.

### Additional Notes:

- **Blocked Contacts**: When you block a contact, they will not be notified directly, but they will see that messages they send you are not delivered.
- **Unblocking**: If you wish to unblock a contact later, you can follow similar steps to access the "Unblock" option within the contact's info in WhatsApp settings.
- **Privacy Settings**: WhatsApp allows you to control who can see your profile information, status updates, and profile picture in settings separate from blocking.

Blocking a contact on WhatsApp is a useful feature if you want to avoid communication with specific individuals or prevent unwanted messages.