After opening a case explaining that our users are being kicked off from RingCentral, RingCentral Support asked to add this idea here:"We're very sorry for the late update as we had to confirm our findings from our backend team about the cause of the issue and we finally got an update. It was due to the users not being allowed to complete signup due to their IP originating from within Brazil. We know that it shouldn't be the case but currently, that's the limitation that we have so we encourage you to submit a request for this on our site: ideas.ringcentral.com. Thanks, RingCentral Support"