> (3) If you've chosen not to give them your contact book, they have worsened the UX over time (for example, it only shows phone numbers now and not the display names they have set).
Adding to this, you also cannot initiate a first (new) message to anyone unless you have granted contact access. The workaround is to ask the other person to message you first...
Re:“Why Using WhatsApp Is Dangerous“
by veniversum on Friday January 31, 2020 @03:01PM
(#22205049)
You can initiate a message to anyone using https://api.whatsapp.com/send?phone=<phone_number>
(2) There is no way to disable their calling service. I don't want people to call me on WhatsApp.
(3) If you've chosen not to give them your contact book, they have worsened the UX over time (for example, it only shows phone numbers now and not the display names they have set).