Being blocked by someone - There are a couple of indicators that you may be blocked: You can no longer see a contact's last seen or online in the chat window. Learn more here. You do not see updates to a contact's profile photo. Any messages sent to a contact who has blocked you will always show one check mark (message sent), and never show a second check mark (message delivered). Any calls you attempt to place will not go through. If you see all of the indicators above for a contact, this could mean that the user is blocking you. However, there are other possibilities. We have made this intentionally ambiguous in order to protect your privacy when you block someone.