You can initiate a call or message using Whatsapp. The fourth option in the communications hub, allows you to go straight to a contact's Whatsapp page to call them.

Note: In order for WhatsApp to understand the number, that might require the full international format (e.g. +306979112902). 

 

You can also reach out to them on Linkedin and Twitter using the 5th option in the communication hub.