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Motorola MB7621 Cable Modem | Pairs with Any WiFi Router | Approved by Comcast Xfinity, Cox, and Spectrum | for Cable Plans Up to 900 Mbps | DOCSIS 3.0
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | Motorola |
Internet service provider | Time Warner Cable, Xfinity, Charter Spectrum, Cox |
Connectivity Technology | Ethernet |
Compatible Devices | Personal Computer |
Product Dimensions | 7.25"L x 2.25"W x 7.88"H |
About this item
- Model MB7621 is recommended for actual cable Internet service speeds up to 650 Mbps. Wirecutter rates this “the best modem for most people.” A Full-Band Capture Digital Tuner ensures faster, more reliable Internet.
- This cable modem's 1 Gigabit Ethernet port connects to a WiFi router, computer, HDTV, game station, or streaming video device. Great for use with Whole Home WiFi or Mesh networks like eero, Google WiFi, and Orbi. (This cable modem does not have a built-in wireless router or telephone call capability. The Motorola MG7315, MG7540, MG7550, and MG7700 have a built-in wireless router.)
- Requires cable Internet service.Approved by and for use with Comcast Xfinity and Xfinity X1, Cox, Charter Spectrum, Time Warner Cable, BrightHouse, CableOne, SuddenLink, RCN, and other cable service providers. Eliminate cable modem rental fees up to 156 dollars per year. (Savings are shown for Xfinity and vary by cable service provider. No cable modem is compatible with fiber optic, DSL, or satellite services from Verizon, AT&T, CenturyLink, Frontier, and others. Model MB7621 has no phone jack.)
- Setup is fast and easy using the quick start guide.
- Attractive, compact design minimizes shelf space, improves cooling, and extends product life while looking great in any home or office. A 2-year warranty plus rugged lightning and power surge circuits protect your investment.
Frequently bought together
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This Item Motorola MB7621 Cable Modem | Pairs with Any WiFi Router | Approved by Comcast Xfinity, Cox, and Spectrum | for Cable Plans Up to 900 Mbps | DOCSIS 3.0 | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | -18% $89.99$89.99 List: $109.99 | -20% $119.95$119.95 New Price: $149.99 | -10% $197.97$197.97 List: $219.99 | $57.92$57.92 | -15% $169.99$169.99 List: $199.99 | $39.99$39.99 |
Delivery | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | — | Get it as soon as Tuesday, Apr 2 |
Customer Ratings | ||||||
Easy to install | 4.4 | 3.5 | 4.2 | 4.3 | 4.2 | 4.3 |
WiFi signal | 3.9 | 2.5 | 3.7 | 3.9 | 3.8 | 3.8 |
Tech Support | 3.5 | 3.5 | 3.2 | 3.7 | 3.4 | 3.6 |
For gaming | 4.5 | — | — | 4.5 | 3.8 | 4.0 |
Value for money | 4.1 | — | 3.8 | — | 4.0 | 4.5 |
Sold By | MTRLC LLC | Motorola Networking Renewed | Verdi! | Abe's Electronics Center | MTRLC LLC | Woot |
connectivity tech | Ethernet | Ethernet | Ethernet | Wired | Wi-Fi, Ethernet | Ethernet |
ethernet ports | 1 | 1 | 2 | 1 | 4 | 1 |
number of ports | 1 | 1 | 2 | 8 | 4 | 1 |
data transfer rate | 1000 megabits per second | 3.8 gigabits per second | 2500 megabits per second | 680 megabits per second | 1 gigabits per second | 400 megabits per second |
max downstream rate | 1000 megabits per second | — | 2500 megabits per second | 343 megabits per second | 1000 megabits per second | 686 megabits per second |
max upstream rate | — | 3.8 gigabits per second | 2.5 gigabits per second | 123 megabits per second | — | 143 megabits per second |
Product guides and documents
Videos
Videos for this product
2:25
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Excellent Alternative to ISP Provided Modem
Animal Facts
Videos for this product
4:26
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Setting Up The Motorola MB8611 DOCSIS 3.1 Cable Modem
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What's in the box
Product Description
The smart choice for your cable Internet service
Eliminate monthly cable modem rental fees – Typically saves 168 dollars per year in Xfinity cable modem rental fees. Actual savings depend on your service provider.
800+ Mbps – Maximum actual Internet download speed
GigE Ethernet port – For a high-speed wired connection to any router, computer, or other Internet-capable device.
Connect any WiFi router you choose
Plugs easily into any router for shared Internet access by all your WiFi and Ethernet-capable devices. This flexible approach lets you pair this cable modem with any router you choose for your WiFi needs, including a mesh router or gaming router.
If the MB7621’s Ethernet port isn’t used for a router, it can plug into a computer, HDTV, game station, or other Ethernet device.
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Compatible with Most Cable ProvidersCertified by Comcast Xfinity, Cox, Charter Spectrum, and other cable providers. * Not compatible with Verizon, AT&T, CenturyLink, and other fiber optic, satellite, or DSL services. |
Fast Internet SpeedConnects fast with just 3 connections - power, coax cable, and Ethernet. |
Supports internet plans with speeds up to 900 MbpsFor other service providers, supported service speeds are similar to Comcast. |
MB7220 | MB7420 | MB7621 | MB8600 | MB8611 | |
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Customer Reviews |
4.3 out of 5 stars
4,311
|
4.4 out of 5 stars
6,311
|
4.4 out of 5 stars
28,836
|
4.4 out of 5 stars
28,836
|
4.4 out of 5 stars
28,836
|
Product Type (This table only includes cable modems with NO built-in WiFi router) | 8x4 Cable Modem | 16x4 Cable Modem | 24x8 Cable Modem | DOCSIS 3.1 plus 32x8 3.0 Cable Modem | DOCSIS 3.1 plus 32x8 3.0 Cable Modem |
DOCSIS Channel Bonding | 8x4 DOCSIS 3.0 | 16x4 DOCSIS 3.0 | 24x8 DOCSIS 3.0 | DOCSIS 3.1 plus 32x8 DOCSIS 3.0 | DOCSIS 3.1 plus 32x8 DOCSIS 3.0 |
Certified for These Cable Internet Services. Typically Works with Many Others. | Comcast Xfinity, Cox, Spectrum, Sparklight (CableOne), WOW! | Comcast Xfinity, Cox, Spectrum, Suddenlink, Sparklight (CableOne) | Comcast Xfinity, Cox, Spectrum, Suddenlink, Sparklight (CableOne) | Comcast Xfinity, Cox | Comcast Xfinity, Cox |
Recommended by Comcast Xfinity for Internet Service This Speed Tier or Below | 200 Mbps | 300 Mbps | 800 Mbps | 1000 Mbps | 2500 Mbps |
Maximum Internet Download Speed (Actual speeds are lower) | 343 Mbps | 686 Mbps | 1000+ Mbps | 1000+ Mbps | 2500 Mbps |
Built-in WiFi Router | No | No | No | No | No |
Gigabit Ethernet Ports | 1 | 1 | 1 | 1 | 1 (2.5 Gbps) |
Works With Any WiFi Router That Has an Ethernet WAN port | ✓ | ✓ | ✓ | ✓ | ✓ |
Telephone Ports | No | No | No | No | No |
What Modem/Router Product is Most Similar to This Modem-Only Product? | Yes, MG7315 | Yes, MG7540 | Yes, MG7700 | None, but works with any router that has an Ethernet WAN port | Yes, MG8702 |
Looking for specific info?
Product information
Product Dimensions | 7.25 x 2.25 x 7.88 inches |
---|---|
Item Weight | 1.12 ounces |
ASIN | B077BL65HS |
Item model number | MB7621 |
Batteries | 1 9V batteries required. |
Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank | #7,506 in Electronics (See Top 100 in Electronics) #17 in Computer Networking Modems |
Is Discontinued By Manufacturer | No |
Date First Available | December 20, 2017 |
Manufacturer | MTRLC LLC |
Country of Origin | Vietnam |
Warranty & Support
Feedback
From the brand
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers are happy with the quality of the modem. They say it works well and has no issues. They are also happy with speed and ease of setup. However, some customers have reported issues with rebooting. They mention that the mode would reboot itself 6 to 8 times a day. Customers have mixed opinions on stability, value, compatibility, and signal strength.
AI-generated from the text of customer reviews
Customers like the quality of the modem. They mention that the hardware works fine, it works as expected, and it works fantastic together. Customers also say that it's very reliable and has a decent expectation of a great ROI.
"...Wow. I really like this modem. This is a barebones rock solid dead simple workhorse...." Read more
"...modem in place with my Erro wifi router and these two work fantastic together!..." Read more
"I received the modem and it is not working as expected...." Read more
"...UPDATE JUL2018: The MB8600 is still running like a champ. No issues...." Read more
Customers find the setup of the modem to be very easy. They mention that it's simple, quick, and easy. Some say that the mode is a plug-and-play device that hooks up fast.
"...It works great and I've had 0 issues with it so far. Easy as plug and play" Read more
"...I got the Motorola AC2600 4x4 WiFi Smart router. Installation of both devices was very easy. Literally, plug and play...." Read more
"...So far it appears I worried needlessly. Setup and activation was a breeze...." Read more
"...Setting up the MB8611 was a breeze. It's a plug-and-play device, so all I had to do was connect it to my coaxial cable, power it on, and it was..." Read more
Customers like the speed of the modem. They mention that it's much better on their internal network, fast pages load, and there's no lagging or buffering. They say it'll handle higher speeds and is easy to install. Customers also say that the mode is capable of handling higher speeds, resulting in a 40% increase in download speed. They also say the setup is simple, quick, and easy, and that the device continues to run smoothly.
"...Plus it's blazingly fast." Read more
"...We haven't had any lagging or any buffering and at peak usage with all persons at home, we have up to 4 smart phones, 3 laptops, 2 iPads and the..." Read more
"...UPDATE: This modem continues to run so smoothly I don't know it is there except when I look across the room at its satisfying cluster of blinking..." Read more
"...turned on version 3.1 but; I was provisioned for 150 Mbps and did not see a speed jump. Nine months later, still no Century Link offer...." Read more
Customers are mixed about the signal strength of the modem. Some mention that the line is dirty, but the mode is good and offers bonded internet connections. However, others say that they could not obtain an Internet connection, the internet connection stopped working, and the LAN connection loses every five minutes.
"...step did initially lead me to frustration with my modem and router failing to connect as I had the assumption of plug-n-play service...." Read more
"...That's it. It makes a connection. And hasn't failed since I got it a month or so ago...." Read more
"...Comcast quickly (according to the lights); but, I could not obtain an Internet connection...." Read more
"...I've experienced no issues with dropped connections nor spontaneous reboots. Lovin' it." Read more
Customers are mixed about the value of the modem. Some mention it's really good value, worth the investment, and the best priced along with speed, while others say that it'll increase the price of an obviously defective modem and is mediocre at best.
"Pricy, but worth it. Motorola is the go to brand for high quality...." Read more
"...from the 192.168.100.1 web server, makes it, once again, totally useless." Read more
"Reasonably priced, easy to install and almost a 40% increase in download speed...." Read more
"...-The future of modems, great investment at a better price than the Netgear and ARRIS branded 3.1 modems...." Read more
Customers are mixed about the stability of the modem. Some mention that it's been stable so far with no issues, while others say that it has intermittent drop outs and the base is very unstable.
"...Long story short, if you experience repeated reboots and intermittent drop outs then consider it may be the modem...." Read more
"...And this modem serves as an example. My network is solid. Strongly recommend as a replacement to Netgear" Read more
"...I will now have to look for another modem since this one just keeps dropping at random." Read more
"...This cable mode delivers not only the high performance and stability, but absolutely the easiest cable modem installation that I have done yet...." Read more
Customers are mixed about the compatibility of the modem. Some mention that it works seamlessly with any WiFi router, providing better WiFi connectivity throughout the house. However, others say that issues changed and the mode was not compatible with their Spectrum plan. The support for modems is buried and it's not currently supported by Spectrum.
"...gentlemen comment on this review saying that the modem doesn't have any router functionality what so ever and that a separate router was needed...." Read more
"...This should be good for about 3-5yrs.3. A good compatible router...." Read more
"...Also not found is the "spectrum analyzer view". These disappointments have cost them 1 star in my review...." Read more
"...Unfortunately I have to return it in that it is not compatible with my Spectrum plan." Read more
Customers are dissatisfied with the rebooting of the modem. They mention that it constantly reboots and gets worse with time. Some say that the modemm would reboot itself 6 to 8 times a day, and that it would reboot automatically. They also say that it randomly restarts for 5 minutes, and fails to reboot a minute later. Some customers also say the modemat would need a hard reboot.
"...was pretty easy, but after a month and a half, the modem would suddenly reboot with no warning. No power issues...nothing obvious...." Read more
"...1.5yrs of ownership it has dropped signals numerous of times, needing constant resets...." Read more
"...I would get intermittent drop out and the modem would reboot itself 6 to 8 times a day...." Read more
"...After further troubleshooting I determined that the modem itself was rebooting every couple of hours...." Read more
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Wow. I really like this modem. This is a barebones rock solid dead simple workhorse.
It's got a plug for the cable and one ethernet (RJ-45) port out and I think an on/off switch.
That's it. It makes a connection. And hasn't failed since I got it a month or so ago.
All I had to do was call my ISP and give them the MAC address (on the sticker on the device)
and they updated their tables and that was it. Turn it on. It goes through the startup cycle. Takes a few minutes to connect like they all do and that's it. Set it and forget it.
What prompted me to get it, is I don't like having to rent the modem from the ISP @ $10.00/mo forever. This literally pays for itself in 16 months, and most people will have their Internet connection for many times that long, and time flies. So it's a good investment.
It doesn't have phone connection like the ISP's modem did. So I called the company/provider that owns copper phone lines in the area and ordered landline service. I'm a nerd/techie and don't care what people say about landlines being for old fogeys, it's like having a backup generator ... I know I can use that landline if the power goes out or if the cell tower gets overwhelmed (too many calls or cell traffic at once), or there's radio interference in the area. Technically cable phone is a 'land line' (hardwired cable connection to provider) and the battery backup in the modem (which the ISP charges more for), could give you emergency phone service in an outage, but a cable phone connection can (and does) fail for more reasons than copper wire phone service does. (Those copper wire connections are called POTS - which stands for Plain Old Telephone Service), and copper wire phones are the most reliable.
Having a separate modem from a router is optima for a few of reasons... Generally hybrid units of anything do everything okay, but nothing optimally (for example combination modem-router units like my ISP rents out). Better to keep the modem separate from the router. Then you can swap either out independently to upgrade as needed, disrupting less of your own network configuration doing so, and also help avoid a single point of failure. Plus, you might be able to score a router in a pinch on shorter notice than a cable modem if the router is the component that fails. Then you can choose the router you actually like, for whatever reason, and don't have to settle for whatever bundling du jour your ISP decides is right for you (even if it isn't).
That gets me to the other point. What DID the ISP decide was right for me (but wasn't)?
For awhile my ISP modem connection was dropping briefly in the middle of the morning. My computer came back up connected to the ISP's 'general public' wi-fi connection to their router which did not work for me and I'd have to keep manually switching back to my own internal Wi-Fi LAN (network). That was not only inconvenient but it forced me to investigate was was going on there.
I learned my ISP gives lets passersby connect to their rental-modem's Wi-Fi signal, without giving me any way to disable that service! That really pissed me off to learn. The idea is that people driving around who have accounts with the provider can get internet access around the neighborhoods. If I was a passerby, that could really help me, so at first glance maybe 'why not, be a good samaritan'.
But wait! There may be more too it than that.
Besides the fact that I don't like it (for good reason), they give me no control over that 'feature'!
And I see some downsides. What's good for the ISP isn't necessarily optimal for me.
What I don't like about that 'service' is that one or more people could sit outside and suck down bandwidth (e.g. slow my connection down), unbeknownst to me. It also might cause the unit to use more energy and put out a stronger wi-fi signal than it needs to. Which health conscious people are well advised to be aware of. Wi-Fi is radiation. Not strong and may not ruin your life, but it is a stressor at a cellular level, this is known. And strong signals, persistent signals and people who are more sensitive or have immunity issues can be more vulnerable (headaches, sleep disruption, or worse). But I like Wi-Fi so I settle for whatever unknown health consequences I may not be aware of.
Also it makes me wonder if a hacker might be able to use it as an additional point of access to my home network.
I also wonder if it's 100% clear to law enforcement at first glance who might be visiting sites or doing something nefarious from the connection point. Might it look like the owner is doing something that a passerby did (and even if they can sort it out later, what if it takes awhile to figure out and they make a bad assumption?)
Anyway, I don't have that problem with this modem and I'm just much happier with it all the way around.
Plus it's blazingly fast.
I already had Cox internet service in place and was using it without issue with my rental modem. Your newly purchased modem has a MAC address, make and model and all must be added to your Cox account to establish the service connection from the wall coax cable to your new personal modem equipment. -This step was not expressed in the setup instructions of the modem nor did I read any reviews of this. Not knowing this first step did initially lead me to frustration with my modem and router failing to connect as I had the assumption of plug-n-play service. Cox will also advise they can not assist you with any personal equipment troubleshooting. Fyi.
Once I contacted Cox tech support and provided my new modem details, they sent a connection signal to my new modem and the lights confirmed the signal and strength and I was done with Cox and my monthly rental fee!
After that call, which took the longest part of the whole setup process, everything else was a breeze!
I am using an Erro Pro wifi router with 2 beacon hubs and setting up my new modem and connection to Erro was S I M P L E. I'd conservatively estimate 10-15 mins after contacting Cox, to getting your in-house internet back online with your new modem and router.
It's been a week with the new Motorola modem in place with my Erro wifi router and these two work fantastic together! We haven't had any lagging or any buffering and at peak usage with all persons at home, we have up to 4 smart phones, 3 laptops, 2 iPads and the smart tv all running with no connection issues. *Now we haven't had all those at once pulling wifi but easily the phones, laptops and tv are continuously. Our Cox service is the 150mgb. We do not game stream.
Yes I would recommend this product for the long-haul investment. This modem is a DOCIS 3.1 and currently Cox services do not require this, however technology is moving this direction and it's just a matter of time. I wanted this equipment purchase to carry us for years to come and not compromise our connection compatibility. With Cox router rental of $11/mo, and this Motorola modem purchase at $160, it will take 14.5 months to break even.
I could have purchased a DOCSIS 3.0 modem at half the cost but I'm not wanting to collect obsolete equipment in years to come. Buy once. Cry once.
*NOTE: This Motorola modem is just a modem. No phone jack for digital phone service. Keep this in mind when choosing to buy equipment to replace your rental gear from Cox. Also verify your chosen equipment is compatible with your Cox services.