Motorola B12 - Advanced Compact Cable Modem | Pairs with Any WiFi Router | Supports Comcast Xfinity, Cox, Spectrum | 2500 Mbps Max | DOCSIS 3.1 | 2.5 Gbps Port | Nex Gen MB8611
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To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Sunday, Dec 7
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Size: compact DOCSIS 3.1 (2.5 Gbps Ethernet Port)
Features
- Ultra-fast DOCSIS 3.1 performance paired with a 2.5 Gbps ethernet port for true multi-gig internet speeds.
- Approved for Comcast Xfinity, Cox, Spectrum, RCN and Astound and supports the fastest internet plans available. The products are residential only. Please verify your ISP requirements prior to purchase.
- Superior next generation technology but pays for itself. Owning your own modem eliminates up to $168 per year in monthly rental charges.
- Fast streaming, conferencing, gaming - Applies Active Queue Management (AQM) for reduced Internet latency and better app performance, including online gaming, conferencing, and streaming.
- Multi-gigabit Ethernet speed - A 2.5 GB Ethernet port delivers true high-speed connectivity to even the fastest routers and computers, providing downstream speeds just below 2,500 Mbps and upstream speeds up to 800 Mbps when supported by your internet service plan.
- This model replaces the MB8611 with 32 x 8 Channel Bonding
- 2 Year Warranty and US Technical Support available
- Technical support available via phone, chat or email. Please contact us for any issues with connecting to service
Brand: Motorola
Internet service provider: Comcast Xfinity, Cox, Spectrum, RCN, Astound
Connectivity Technology: Ethernet, Wi-Fi
Compatible Devices: Router
Product Dimensions: 3.5"L x 3.5"W x 5.5"H
Product Dimensions: 3.5 x 3.5 x 5.5 inches
Item Weight: 1.98 pounds
Item model number: B12
Date First Available: January 26, 2023
Manufacturer: Motorola
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Dec 7
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: DOCSIS 3.1 (1 Gbps Ethernet Port)
Pricy, but worth it. Motorola is the go to brand for high quality. This modem delivers, but remember keep in mind you have to use a router in order to use multiple devices in your home. I got the Motorola AC2600 4x4 WiFi Smart router. Installation of both devices was very easy. Literally, plug and play. However, you will most likely have to deal with your internet service provider in order to register your modem with their service and allow the modem to receive their signal. That was the most painful process. Everything else worked flawlessly. After buying and installing both the modem and router, I upgraded my Roku device to the Roku Ultra HD/4K streaming device with voice activated remote. I'm very pleased with the results I got. See my review for the Roku Ultra below: For about three years, I was using the same Roku device that was provided free with my Sling subscription. It was frustrating to watch a movie only for it to stop and start buffering. It was frustrating to try and watch YouTube content only to crash during the "loading" period or stop in the middle due to buffering issues. After researching and troubleshooting I came up with the following fixes that have resulted in awesome streaming, seamless channel surfing and no buffering once any channel is loaded (within 5 seconds or so). First, you need to run a speed test of your current internet. You should get results like 400mbps on a higher end laptop (i.e., Macbook Pro). If you get anything less, you need to up your internet service provider download speed. If you have multiple devices, I recommend at least 600mbps. Ideal would be 1000mbps. Next you need to make sure your modem can handle the speed. I got a Motorola MB8600 modem. This modem will handle speeds in the gigabit range. Hold on, that's not all. With this modem you need to get a router that can continue to support the new speed and the internet service that you are working with. I bought a Motorola AC2600 4x4 WiFi Smart router. This router will increase coverage to your home and will seamlessly support the internet speed and connectivity of the Motorola modem. All three of these devices compliment each other and will help you dramatically improve your video streaming ability. Please keep in mind that if your internet service isn't high enough, you will not get much of an increase in performance. You have to look at the entire system in your home. 1. The internet service that you are paying for monthly. This is critical. It has to be high enough (600-1000mbps). 2. A good Modem. Your modem is the device that takes the internet signal coming from your service (i.e., Xfinity, Verizon). I recommend you make sure your modem can handle speeds in the gigabit range. This should be good for about 3-5yrs. 3. A good compatible router. The router takes the signal from the modem and splits it so that multiple devices can use the internet signal coming into your home. Note- There are cable modems out there that are combination modem/routers. If you are on a budget they will work. However, I have found that my new combination of separate modem and router has improved my internet performance tremendously. Lastly, if you are on a budget and can't afford all the upgrades, then getting this Roku device will just be a waste of money. This Roku device is a high-end streaming device that will only perform at it's best if you have all the other devices in place that can provide the clean and fast internet signal it needs. I did a complete overhaul of my home system and can't be more pleased with the results. I replaced each component that I've described in stages just to see if each device really made a difference (a noticeable difference). I'm happy to report that each stage made a big difference.
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Reviewed in the United States on May 2, 2020 by Truth Teller
Size: compact DOCSIS 3.1 (2.5 Gbps Ethernet Port)
Easy set up, easy to link with my router. Self explaining and will save me a lot of money in the long run. Delivers my full 1000 mbps. Battery life is not a topic as it is plugged in for power. Everything works fine so far. I will update in case the status changes. And: It's decorative. I'd have no issue to place this in plain sight.
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Reviewed in the United States on October 6, 2025 by Bianca B.
Size: DOCSIS 3.1 (1 Gbps Ethernet Port)
I've been running an Arris SB6121 cable modem for about eight years now, but have been having some outages recently, in which the modem appeared to be at least partly responsible. In addition, the SB6121 is getting old and can support only four download channels, limiting its ability to use higher service speeds now available. My ISP advised that I upgrade, and given that my ISP is rolling out DOCSIS 3.1 starting in November, I decided it made sense to go with a DOCSIS 3.1 modem. Right now, that narrows the choice pretty much to three devices: the Netgear CM1000; the Arris SB8200; and this modem, the Motorola MB8600. The cable technician who just replaced my line advised against the Netgear due to having seen a lot of reliability issues with Netgear cable modems, but had no preference between the Arris and the Motorola. Since their specs are almost identical, but the SB6121 has had some firmware download issues and the Motorola is $30 cheaper than the Arris (and has a two-year warranty), I went with the Motorola. The Motorola, unlike most other cable modems, also has an actual physical power switch, so should you need to power-cycle it you can do so without unpligging it. Both this modem and the Arris have two gigabit-Ethernet ports. Yes, I know, you can only see one in the photos. And you'll only be able to see one when you take it out of the box. That's because the second port is hidden under the yellow adhesive film on the back panel. THERE IS A REASON FOR THIS. That second port is NOT for plugging in a second device, and you cannot use it for that purpose. Don't try. The second port is there so that if your router is capable of it, you can connect BOTH ports to your router and bond the two gigabit channels together into a single 2-gigabit channel. Your router must support this, your ISP must enable the second port,¹ and it's up to you to configure the router correctly for port bonding/trunking. Of course, this is only relevant if your ISP offers data rates over 1Gb/s *AND* your router can support that anyway. If you're a residential user it's unlikely that both of those are true. When you're switching to a new modem, you'll need to call your ISP and you'll need the MAC address from the sticker on the bottom of the modem. You will need to power your router off and wait for the modem to initialize fully the first time before you turn it back on. Expect that first-time initialization to take several minutes. Once the modem is online, bring your router back up and you should be good to go. AS SOON AS IT'S UP, point a web browser at 192.168.100.1, log in to the modem using the default password on the sticker on the bottom of the modem, click Advanced, click Security, and CHANGE THE ADMIN USERNAME AND PASSWORD. BOTH allow you to use only A-z and 0-9, which is a little weak. But you're allowed up to 15 characters. Use as many of them as you can to make your new password harder to guess — and no, don't use your dog's name, your phone number, or a dictionary word as a password. Make sure you record what you changed it to. Don't lose it. What do you get for your money? Well, in addition to DOCSIS 3.1 support, the MB8600 can bond up to 32 downstream and 3 upstream data channels. In my case, with no change in my service cost, my download bandwidth increased from about 46 megabits per second to about 96.5, and my upload speed from about 4.5 megabits per second to 11. Viewed from the perspective of what I was paying for what service tier, this modem will pay for itself in about a month and a half. With eight times as many download channels, it is also much more resistant to noise or other problems on any single channel. So far, the Motorola MB8600 earns a solid two Technical Technical Thug thumbs up. It is a substantial improvement over the Arris SB6121 it just replaced. ____ ¹ Well, OK, you *CAN* enable it yourself in the advanced configuration on the modem. But if you're messing with advanced configuration settings, you'd better know what you're doing. If you don't, you're on your own.
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Reviewed in the United States on April 30, 2018 by Phil Stracchino (Technical Thug)