Will they know if I delete their contact in WhatsApp - briefly?
If you delete someone's contact from your WhatsApp, it will not notify them or affect the conversation history between you two. They can still message and call you as usual.
Will they know if I delete their contact in WhatsApp - in detail?
The question of whether someone will be notified if you delete their contact from your WhatsApp is a common one, and the answer involves understanding both the technical aspects of the application and user privacy considerations.
WhatsApp is designed with user privacy as a paramount concern. When you delete a contact from your phone's address book or directly from the WhatsApp application, there are no notifications sent to the other party informing them of this action. The deletion process is entirely on your end and does not trigger any alerts or messages to the other user.
However, it is important to note that deleting a contact will not remove their messages from your chat history. The conversation threads with the deleted contact will remain in your WhatsApp unless you manually delete them. This means that while the other person won't receive a notification about being removed from your contacts, they can still see that you are actively participating in the conversation or have read their messages if you choose to continue interacting with them.
Moreover, deleting a contact will not prevent them from sending you messages in the future. They can still reach out to you using your phone number, as WhatsApp uses phone numbers as unique identifiers rather than relying solely on contacts. This means that even if their name and number are removed from your contacts list, they can continue to communicate with you via WhatsApp.
In summary, deleting a contact in WhatsApp does not send any notifications or alerts to the other person. The action is private and only affects your local device settings. However, it is essential to be aware that message history and future communication possibilities remain unaffected by this action.