You can easily delete a WhatsApp contact; however, note that when you delete a contact in WhatsApp, the contact will also be deleted on your phone.

WhatsApp contact lists are made from your phone's contact list. Removing a contact from your phone should remove them from WhatsApp, but what can you do when the contact is not already on your phone?

You can delete a message on WhatsApp so that it will no longer appear in the chat for yourself, or for everyone else.

Update (10/31): WhatsApp is now allowing you to delete messages you've sent by mistake. A new update is rolling out now that gives users a seven-minute grace period to delete messages whether you've ...