My app is private and I don't see option to submit for production.
My client ID is sODVJfQ9QjudEURsMUvl5w
Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.
Download RingCentral Phone for Desktop:
Tip: switch to the "sandbox mode" before logging in the app:
5 People are following this question.