
ARRIS SURFboard G20 WiFi-6 D3.1 Cable Modem Router
Q: Does this modem router work with Spectrum?
A: Yes, the ARRIS SURFboard G20 is compatible with Spectrum, along with other major US cable internet providers.
Q: What type of cable modem technology does this device use?
A: This device uses DOCSIS 3.1 cable modem technology with 2 downstream x 2 upstream OFDM channels.
Q: What is the maximum internet speed supported by this ARRIS modem router?
A: The ARRIS SURFboard G20 supports internet speeds up to 1 Gbps.
Q: How long is the warranty on this modem router?
A: This ARRIS modem router comes with a 2-year warranty for both parts and labor.
Q: Will this work with quantum fiber
A: The SURFboard G20 is a DOCSIS 3.1 cable modem combined with a Wi-Fi 6 router, specifically designed for use with cable internet providers such as Comcast Xfinity, Cox, and Spectrum. For fiber-to-the-home or Ethernet-delivered service, the G20 can be reconfigured to function solely as a Wi-Fi router by disabling its integrated cable modem. Since the G20’s Ethernet port only supports up to 1 Gbps, your Fiber Internet speed will be limited to that maximum.
Q: Does this modem work with Optimum network?
A: Optimum allows DOCSIS 3.1 modems on their Internet (no phone service) service for all Internet speeds. The G20 includes a built-in DOCSIS 3.1 modem and we recommend you check with Optimum for compatibility with your current Internet service plan.
Q: How many devices can be connected to the Wi-Fi router at the same time?
A: The SURFboard G20 can support up to 100 wireless devices connected simultaneously. This is thanks to its Wi-Fi 6 (AX3000) technology, which is designed for high device density and better performance in busy networks.
A: You need to connect more than two wired devices, you can do this easily by adding an unmanaged network switch.

ARRIS SURFboard G20 WiFi-6 D3.1 Cable Modem Router

Multi-gigabit speeds for your home network. The SURFboard G36 is a DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router combo. Stream 4K content smoothly, game without interruptions or slowdowns. It features a 2.5 Gbps Ethernt port for multi-gig networking PLUS four 1-Gigabit Ethernet ports to connect all your devices. The SURFboard G36 is compatible with major U.S. cable internet service providers and is best for speed plans up to 2.5 Gbps. The compatible SURFboard Central app simplifies setup and management of your network.

Upgrade your home network with the ARRIS SURFboard G34. It's a DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router combo. Wi-Fi 6 supports smooth 4K video streaming and low latency online gaming. This ARRIS SURFboard cable modem router features four 1-Gigabit Ethernet ports to connect your wired devices, and the compatible SURFboard Central mobile app allows for quick and secure setup. The G34 is best for gig-speed cable internet plans and compatible with major U.S. cable internet providers including Cox, Spectrum, Xfinity and others.

The ARRIS SURFboard S33 is a DOCSIS 3.1 Cable Modem that delivers the fastest speeds and the latest technology. With a 2.5 Gigabit and a 1 Gigabit Ethernet port, the S33 enables a multi-gig experience for things like online gaming, 4K video streaming and more. It’s best for cable internet speed plans up to 2.5 Gbps and setup is simple with an easy-to-use app. It's compatible with any Wi-Fi router and saves you money on monthly rental fees. Upgrade your home network with an SURFboard S33 DOCSIS 3.1 Cable Modem.
| Pros for ARRIS - SURFboard G20 DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router Combo - Black | |||
|---|---|---|---|
| Overall Performance, Setup, Speed | Speed, Ease of use, Setup, Performance, Wi-Fi | Overall Performance, Ease of use, Speed, Setup | Speed, Overall Performance, Ease of use, Setup, Ethernet Port |
| Cons for ARRIS - SURFboard G20 DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router Combo - Black | |||
| Connectivity | Price | Connectivity, Signal Strength, App | Price, Heat |
Customers commend the SURFboard G20 for its overall performance, noting faster and more reliable connections. They also appreciate its connectivity, highlighting the easy setup and consistent connection. However, some customers have reported experiencing difficulty during the initial setup process.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Great cable modem for Xfinity cable. Fast with great range
DavidN Posted
Router combo is working well. However, it took several days to get it started. I had to have an cable company tech connect a cable to my mesh system. The combo router had separate connections for the internet (cable) and the wifi systems. I did not know this and after calling the surfboard techs several times, I was finally connected properly. I do not like the fact that the modem router is not completely wireless since I needed a cable for the mesh system. Other than that it is great. My speed is faster than my old combo router.
JoanneL Posted
Set-up new modem went well with Xfinity app. Set-up was easy with Arris App. Super fast and works well with a variety of devices. Best combo modem/router I've every owned.
Customer Posted