title: Using CallKit (iOS) or ConnectionService (Android) for Tokbox/Opentok application
body: <p>I would like to use CallKit (iOS) or ConnectionService (Android) to use the VoIP and have my tokbox video call go through the phone app. Any recommendation/suggestion/link that you can point me to?</p>
  
  <p>I found one reference of Github for iOS, but nothing for Android.
  <a href="https://github.com/opentok/CallKit" rel="nofollow noreferrer">https://github.com/opentok/CallKit</a></p>
  
  <p>It seemed to me that this would be the best User Experience, but I would like to experienced feedback before dwelling into this</p>