I would directly contact the ISP and have them work with you on this. If there site is showing it's compatible and supported, screen capture that and show them this information. Escalate the ticket. If it comes down to that they don't, just return the Orbi system to where you got it from. After this, ask the ISP for a modem only option that is supported by them, then you could look into getting a Orbi system with out a built in router and use it as your router and wifi. Modems to ask about are NG CM1000 or 1100 or Motorola MB8600 or Arris SB8200.
