I called multiple times about buying a modem vs. renting one. Each time I was told that I HAD to rent a modem for gig speeds. Then I found this thread on the forums. https://forums.xfinity.com/t5/Your-Home-Network/Approved-Xfinity-Network-Devices/td-p/3109887
That means the phone reps lied and I've been charged $10 for 19 months. That's $190, and that's not right. Please help!