How to block and unblock a contact - You can stop receiving messages, calls, and status updates from certain contacts by blocking them. Block a contact Open WhatsApp, tap More options > Settings. Tap Account > Privacy > Blocked contacts. Tap Add. Search for or select the contact you want to block. Here are a couple alternative options for blocking a contact: Open a chat with the contact, then tap More options > More > Block > BLOCK or REPORT AND BLOCK, which will report and block the number.