Customer Ratings & Reviews

The ARRIS S33 is a better investment than the pricier Netgear counterpart. It’s the most compact Multi-Gig modem, measuring just ‎5.14 x 1.8 x 4.74 in and weighing less than a pound. Like all DOCSIS 3.1 modems, the SURFboard S33 can function as a top-tier DOCSIS 3.0 modem. You should use it only when you have a download speed of around 400Mbps or faster. That’s because certain low-speed cable plans require a DOCSIS 3.0 modem to work. The S33 is designed to work with a Wi-Fi 6 router, preferable one with a Multi-Gig WAN port. If you have a Wi-Fi 5 router, you will need to upgrade it or stick with a DOCSIS 3.0 modem. The S33 comes with a single large LED light on the front. This light changes its color to show the modem’s conditions. It has three colors: Amber - modem is off; Green means the modem is on and Flashing - firmware update is in process. Blue is only available in solid and means the modem is working well in DOCSIS 3.1 mode. This all depends on the internet plan you have. Make sure, though, that you have a Wi-Fi router that has a matching WAN speed.

This device does exactly what it is supposed to. Has a little bit of heat due to its size and design...however does not cause concern or drops.. why not other colors...(black would be nice and look cleaner for the closet). Xfinity sees the device pushes whatever updates to the device that is needed and just works. i beleive there are two variants to this... one that has only a 2.5gbe (v2).. and one that has both a 2.5gbe and 1gbe port (v1). i received the v1 Have xfinity 1.2 gbps (provisioned to 1.4)... router has 2.5gbe wan and it sees and links correctly. Nice feature LED shows or is illumianted when an issue is occuring..convinient.. GUI immediete status of modem for signal levels and noise without login. The surfboard app... only have device registered for warranty purposes.. have yet to find a use for the app. Stopped using xfinity hardware as i usually like owning my own devices. XB7 and XB8 are what they give out to customers now.. and they are fantastic for an all in one unit.. and they do exactly what they are meant to..

This is a great modem. Was super easy to install, minimum footprint and has worked seamlessly with my eero mesh router with speeds pretty reliably close to the 1GB I'm paying for.

The ARRIS SURFboard delivers fast, reliable internet with DOCSIS 3.1 support, ideal for streaming, gaming, and multi-device households. Its dual ports handle high-speed connections efficiently, while setup is straightforward. The sleek design fits any home, though the single LED status light may be confusing. Overall, a top-tier modem.

Easy setup and works as it should. Approved for use with Cox so comes online smoothly. Seamless with eero

I was having issues with WiFi around my house. This solved every single one of my problems. Lightning fast speed, no more signal drops, didn’t take up a lot of space. If you’re thinking about it, get it.

Super fast and easy set up and that also describes the performance. Giving me blazing fast speeds along with my Google Mesh devices. Highly recommend. Very happy

Well here we go Here's the Arris S33 that I exchanged that Motorola for If you go to the review of the Motorola that would be the competing side you can see what I mean about the Motorola probably having a locked bootloader If you want user friendly connectivity I'd recommend the Arris over the Motorola If your ISP is listed on there and you're you know just gung ho about getting the Motorola then go for it I was just trying to switch teams from the 8200 since the Motorola 8600 was its counterpart last generation and I didn't realize it most likely has a locked bootloader and that's why it only works with certain ISPs Keep that in mind there's a price difference I believe the errors is cheaper It runs great I never had a problem with the original and any reason to stray I just wanted to try it Even if your ISP is listed on there I think Cox and a couple others around there you're better off just getting the airs cuz it's going to play nicely with those as well and if you ever move and you have to switch ISPs you're still going to have a modem that's going to work with essentially anything Think of it like having an unlocked bootloader on a phone.No compromises and performance. I was just curious ARRIS

Love the speed I got when booted up. Due to this model having heat issues(no vents on both sides) I'm having to shut down my modem every night so it can cool off. Arris is a good brand modem. I have had previous models but never one like this. As a rec ok mmandation if anyone does but this model is to plan to purchase a mini fan. Those like they have in deck top computers to cool out modem down while in use. That's fan is my next purchase.

Connection was easy, speeds are great, compatible with my local internet service provider. No complaints.

Very easy installation. I got it up in running in less than 5 minutes. tthe surfboard app automatically linked to Xfinity! My wifi router connected to the surfboard modem without any issues. Running seemlessly since then!

This modem is very small. I lead with that because the cable it’s attached to topples it over unless I book-end it. That said, it is easy to set up and it is very fast. It works well with my mesh router system and saves on monthly rental fees. I upgraded from my old still working Arris because this one was compatible with Xfinity, my new internet provider. The app is easy to download and updates are automatic. There are other features, but I will leave those to the techies to highlight. Good value for the money.

If you know anything about modems, you know there was a time when Motorola was the unbeatable kid on the block and made SOLID devices. That's not the case anymore, as I had to turn in my Motorola MB8611 modem under Geek Squad warranty for this Arris Model. I purchased the MB8611 in 2022 and was surprised it had a failure so soon. For some reason, the device just dropped the download speeds to abysmal 0.5 Mpbs levels or lower. Xfinity pushed settings to it and it popped by up for a few hours, then it dropped again, and they said considering how old it was I should replace it. LISTEN TO ME, buy a Geek Squad Warranty with your modem, it will save you the pain in the future and maybe some costs if it fails before it's typical EOL. I picked this since I'm on the gig extra plan with Xfinity and pulled speeds about 900+ Mbps. I recently upgraded to their highest speed consumer plan and this bad boy is going strong and not being a headache.

The ARRIS SURFboard S33 has been an excellent upgrade for my home network. If you’re running a high‑speed internet plan or planning to move into multi‑gig speeds, this modem is absolutely worth considering. Setup was incredibly simple—plug it in, activate it with your ISP, and it’s ready to go. The whole process took only a few minutes, and the modem connected without any issues. Performance is where the S33 really shines. Speeds are consistently fast and stable, even during peak hours when my previous modem would slow down. The 2.5Gbps Ethernet port is a huge advantage for anyone who wants to future‑proof their setup or take full advantage of faster plans. Streaming, gaming, video calls, and smart home devices all run smoothly with no drops or buffering. The compact design is another plus. It doesn’t take up much space, runs cool, and stays quiet. Once it’s set up, it just works in the background without needing attention. That reliability is exactly what you want from a modem. If you’re renting a modem from your ISP, the S33 pays for itself quickly. It’s a strong, dependable choice that delivers the speeds modern households need. Overall, the ARRIS SURFboard S33 is a fast, stable, and future‑ready modem that I’d easily recommend.

I bought this to replace a Motorola modem that was randomly disconnecting and dropping service. So far flawless performance and connectivity. I pay for a 1200 megabits plan and I was pulling 1400 megabits down and 40 up on my routers onboard speed test (using standard cat 6 Ethernet cord). It’s a small form factor but gives you two outputs, one 2.5 gigabits and one 1 gigabits, which is nice. As stated, this is just a modem so you will need a router for wifi or to connect more than two devices via hardwire.

Its fast and reliable while being compact and easy to hide. So far so good!

Only had it for a short while but functions well and get great speeds. Easy setup and love that it gives me an extra port if needed. Only thing I don’t like and it is not unique to this unit or most modems is that the manufacturer does mot allow you to update your own firmware…That is hard to find anywhere. It is also bery compact and easy to fit in most spaces.

The Arris S33 is an improvement over the SB8200. It runs cooler than its predecessor and is less buggy in my opinion. Setup on Comcast was easy and went without a hitch. The case design, smaller size and 2.5 Gig Port with this price point makes this modem a good buy. Performance has been flawless for nearly a month. Now if there were some wired 2.5 Gig routers available to exploit the capability of this Modem.

I have Xfinity internet, and bought this as an upgrade for an old Arris 6141 DOCSIS 3.0 modem. I wanted a DOCSIS 3.1 modem as I'm considering getting the gigabit plan down the road. Setup and activation via the Xfinity mobile app took approximately 15 minutes. Thank you, Comcast, for not requiring us to talk with a customer service rep to activate a modem. I'm getting the speeds rated for my internet plan and have no disconnects or dropouts so far.

Easy setup, really was plug and play with my Decco mesh network.