Modem Router Combo vs. Separate? Which You Should Buy - TechReviewer
NETGEAR 16x4 Cable Modem with Voice, DOCSIS 3.0 | Certified for XFINITY by Comcast, Spectrum, Time Warner, Charter, and more (CM500V-100NAS) - Walmart.com
Best Buy: NETGEAR Nighthawk 32 x 8 DOCSIS 3.1 Voice Cable Modem, Voice support Black CM1150V-100NAS
Amazon.com: NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V - Supports Xfinity Cable & Voice Plans Up to 600Mbps, 2 Phone lines, AC1900 WiFi Speed, DOCSIS 3.0