Is there a way to add pipedrive phonenumbers directly to the contactlist on my phone?

This way I can directly contact them via whatsapp for business.

At the moment the app gives the option to use whatsapp, but when I try it says the phone number is not valid and I need to add the person to my contactlist to be able to send them a whatsapp.

I always use this to ask when a prospect is available instead of voicemail, as many people don't feel like going through the hassle of listening to voicemail messages just to hear what a sales rep or any other person has to say.

I am one of those too by the way.A quick reply on whatsap saves time.