Human: How do I know if someone has blocked me on WhatsApp? Assistant: 
Know if Someone Has Blocked You on WhatsApp
1. Tap Chats.
2. Tap a conversation with the user.
3. Check the "Online" or "Last Seen" status.
4. Look for 2 checkmarks next to a sent message.
5. Check for profile changes.
6. Try calling the user.