•  You can use one of the following methods to join a WhatsApp group without having admin permission:
• Request that a buddy in the group add you.
• If the group is open to the public, find it on WhatsApp and click the 'join' button.
• If the group is private, request to be added by the administrator.
• No one can add you to a WhatsApp group without your consent if you enable Group Privacy settings on your smartphone. WhatsApp's new group privacy options are accessible on both Android and iOS.

Read More: When I convert an epub file to PDF using Calibre, I can't copy text out of the PDF. How can I fix that?