The router they rent is $4.95/month. When I had UIA installed a couple years ago, I was told (by the very knowledgeable and very competent) installers that using their router instead of the (fairly new) Netgear one I had, would be easier than using the one that I already had, I think they said because with theirs, I could pick my own password instead of having to use the complicated one they would have to assign, impossible to remember. I do not understand what any of this technical stuff is, but I do know that UIA service and support is amazing! Whatever you do, do NOT I repeat NOT use Frontier!!!!
BTW, welcome! I've lived up here 44-1/2 years now, and still love it.