Sometimes, you don’t want to fully unblock someone, but you need to send them a single message. Unfortunately, you cannot. You must fully unblock them first. However, you can re-block them immediately after sending your message—but remember, they will see your message during that brief window.
If you still have a chat history with the person, open the conversation. Tap their name at the top to view Contact Info , scroll to the bottom, and select Unblock . How to Unblock Someone on Android unblock contact on whatsapp
Need to block them again? Just follow the same steps and tap "Block" instead. Just remember, second chances on WhatsApp don’t come with a message history. Sometimes, you don’t want to fully unblock someone,
Once you hit that unblock button, the digital walls come down: However, you can re-block them immediately after sending