What happens if someone is on your WhatsApp block list - briefly?
If someone is on your WhatsApp block list, they will not be able to call you or send you messages. Additionally, you won't receive any notifications about their attempts to contact you.
What happens if someone is on your WhatsApp block list - in detail?
When you add someone to your WhatsApp block list, several changes occur in how interactions with that person are handled by the app.
Firstly, messages sent by a blocked contact will not be delivered and cannot be seen by you. The sender might see a single check mark (indicating the message was sent), but it won't turn into two check marks (which indicates delivery) or appear with a blue background (indicating read). Essentially, communication from that person is halted at your end.
Secondly, calls from blocked contacts cannot be received. If someone on your block list tries to call you, the call will not ring through, and you won't get any notification about it. Additionally, you won’t have the ability to make calls or send messages to them either; these options are disabled for contacts that are blocked.
Thirdly, updates in status changes by a blocked contact will be invisible to you. This means you won’t see any new profile pictures, “about” information, or status updates posted by people on your block list. Similarly, you won't be able to view their "Last Seen" or "Online" status.
It is important to note that blocking someone does not delete the conversation history with them. The chat history will remain in your message archive, but it will no longer appear as part of your active chats. If you wish to remove the chat history entirely, you would need to manually delete the conversation from within WhatsApp.
Lastly, blocking is a two-way street; the person you have blocked cannot see your status updates or changes in your profile picture either. They will also not be able to call or message you, and any attempts they make will not go through.
In summary, placing someone on your WhatsApp block list effectively prevents them from contacting you via messages or calls, and it hides their status updates from you. The block is comprehensive and applies to both parties involved.