iOS CallKit integration with Contacts and Siri
In iOS, users have the ability to initiate calls from the native Contacts app or Siri, through Skype for Business. Teams should have the same functionality.
Additionally, it should be noted that Cisco WebEx has this functionality
Charles Rube commented
All the voip apps from phone vendors got callkit support a year ago. Missing this feature really drags down using Teams for voice. That Skype for business did have support, I would think it would be an easy add. I want to move our whole office phone system to Teams and this is holding us back.