"I have a sandbox app that is validated and promoted to 'production' but I cannot seem to authorize the app using my Production credentials, can somebody help"Before we answer this question let's look at what differentiates a Public vs Private App in RingCentral :
Private if you are developing an app for your own RingCentral account use;
Public if you are developing an app for many RingCentral accounts.
PlatformType Server-Only (NO UI)
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:
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