Hello, it is not the Router which needs to be compatible with your IPS Verizon Fios, as your Modem must be compatible with your IPS Verizon service.
You can use any make/model of any Router with your Modem, as long as your Modem is compatible with your Verizon IPS service.
If you already have a working Modem on your IPS Verizon service, then this Linksys WRT3200 ACM Router will work.
By the way, I had just upgraded my older Linksys Router which was a N900 to this new WRT3200 ACM Router, and this new WRT Router is lighting fast throughout my 2500 foot two story home with 12 assorted wired and wireless connected items to it. I also purchased the Linksys 8-port Gigabit switch, for all my wired connected items, which looks identical to the WRT3200 Router. I hope this answers your question.