We are trying to test in our sandbox using the legacy phone app located here:
https://support.ringcentral.com/download.html
install file: RingCentral-Phone-24.1.3.msi
We must use the legacy phone to allow calling out with the API. When we try to login to the phone we get "Login Failed", but we are using the same credentials that work for the current phone and web-based client.
The user we are logging in with: cdctestitesa@gmail.com
Phone number: +16282312316
Main number: +16268994541
Account ID from API endpoint: 422160004
Thanks,
George