I'm using the RingCentral app on my iPhone and this past week I've been receiving calls from an Unknown Caller. I answered and it's a patient calling our RingCentral number. I have our office number saved in my phonebook so I'm wondering why it's showing up as Unknown. My co worker has had this issue in the past but cannot recall how to fix this problem. I've deleted the app and reinstalled it and check notifications and what not. Any suggestions?