Changes to status callback behavior for calls placed to mobile Voice SDK applications

Twilio has updated the behavior of status callbacks for calls placed to Android and iOS Voice SDK applications. Starting 15 March 2023, Twilio will emit the ringing callback after the mobile application has successfully received the push notification and established a connection to Twilio. Previously, we would emit the ringing the callback as soon as the push notification was sent. Devices that were powered off, unreachable due to network availability, or users who were not logged in were inaccurately reporting the call progress events before this change.