Moving to New Tenant - No Devices Found

Please clarify your term of "tenant".

The customer contracts for Ring Central through an Avaya re-seller. I'll assume "Tenant" is synonymous with "Account". Our original development and testing was in a demonstration account. They have since set up the actual account, and we are recreating our application credentials for JWT and OAUTH in the new account. We see our new phones and extensions in the new account, but no devices exist. Are devices created through an admin page? Or are they added when we install the softphone?

The list extension device API returns only hard phones and the RingCentral soft-phone app if they are assigned to the extension. You can always double check by logging in the service web admin portal to manage users' devices.

Or see a list of account's devices