That's an issue that support will definitely have to look into. These are Community Forums. Have you tried setting up a support case or contact support by phone? (they may have to re-provision your phone)
https://service.ringcentral.com/login.asp?p_next_page=RCSupportPortalCreateNewCase#/enterCredential
By Phone: 1-888-898-4591 (within the United States)
I know this is an old question, but I have the answer. I would be willing to bet the firmware on the phone is the latest firmware. The problem is that RingCentral is slow to catch up with firmware updates. You may have to go to the phone in a browser using its ip address. Then go to Utilities/Software Upgrade check for Updates and then ask for all available versions of firmware. Pick the one RingCentral says is the latest version supported. Example Polycom IP 6000 runs on a version about 5 upgrades back. The browser will ask if you really want to downgrade. Say yes and goodbye to Boot Loops.
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