Every Orbi is compatible with nearly every internet modem that has an ethernet jack. Orbi owners subscribe to almost every internet service provider in the US and dozens of other countries.
The "key" is that Orbi performs best when the modem is "only a modem". Not a modem/router. Not a modem/WiFi/router.
Orbi also will not do anything to keep a modem from needing to be restarted. That is a problem that needs to be addressed before installing any brand of WiFi. If Frontier is not reliable in your location, and Frontier is not able to resolve the problem, I would consider a change to some other provider. Please understand, I have had the same cable service since Comcast put it in 20 years ago, before Adelphia bought out Comcast, before Time-Warner bought out Adelphia, before Spectrum bought out Time-Warner. I know (literally) zero about Frontier or Suddenlink.
