Now Whatsapp usually lets you being chat with a number when the number is saved.
That may be difficult and rather something that should not be necessary.
And it is not.
The instant messaging platform has a basic function of sending a message to your contacts.
It need be mentioned that having a number saved in your contacts is not a compulsion.
WhatsApp comes with a ‘Click to Chat’ feature that allows users to begin a chat with someone without having their phone number saved in your phone’s address book.
WhatsApp lets you create a link that will allow the user to start a chat with them.
To create the link, use https://api.whatsapp.com/send?phone= and insert the person’s full phone number in international format, after eliminating any zeroes, brackets or dashes. For example:
Use: https://api.whatsapp.com/send?phone=phone number>