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: 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.
Q: Does this support Optimum internet and landline phone ?
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.

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.

Ultra-fast DOCSIS 3.1 performance modem allows you to Stream, game, conference and more with confidence. DOCSIS 3.1 supports speeds up to 10x faster with higher efficiency. Backwards compatible with 32x8 DOCSIS 3.0 so you can future proof your network.
| Pros for ARRIS - SURFboard G20 DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router Combo - Black | |||
|---|---|---|---|
| Overall Performance, Connectivity | Speed, Ease of use, Setup, Performance, Wi-Fi | Overall Performance, Ease of use, Setup, Speed, Size | There were no pros for this product— |
| Cons for ARRIS - SURFboard G20 DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router Combo - Black | |||
| Setup | Price | Connectivity, Signal Strength, App | There were no cons for this product— |
Customers enjoy the overall performance of the SURFboard G20 DOCSIS 3.1 Cable Modem & Wi-Fi 6 Router Combo, noting a faster and more reliable connection. They also appreciate the 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
Posted by DavidN
Needed a new Modem/Router as the one I had before hand was aging and was losing support in terms of software updates, and overall just needed something better to support the growing amount of devices I have at home. I've been with this this SURFboard for maybe only a few weeks at this point and I gotta say it's handling well. With just enough ethernet ports to support the only wired devices (two desktops) and a good handling of bandwidth for all the wireless stuff. My only gripe was that I had to call my service provider to activate, which is just an extra step in the process to the setup that kinda made me groan because I never had to do that before with any other unit I've had. Otherwise I can't complain too much. It's doing a fantastic job so far!
Posted by TheStarMagus
Great combination modem and router. Saves space from the old setup. Needed this to take advantage of the current internet speed. Easy setup and works great!
Posted by TimG