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Customer Ratings & Reviews

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Customer reviews

Rating 4.7 out of 5 stars with 324 reviews

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Rating by feature

  • Connection Quality

    Rating 4.8 out of 5 stars

  • Performance

    Rating 4.8 out of 5 stars

  • Setup

    Rating 4.7 out of 5 stars

Pros mentioned filter

Cons mentioned filter

94%would recommend to a friend

Customers are saying

Customers express satisfaction with the MB7621 cable modem's ease of use, performance, and setup process, frequently citing positive experiences with installation and speed. Many appreciate its compatibility with various routers and internet service providers, as well as its reasonable price. However, some users reported occasional connection issues and noted the lack of built-in Wi-Fi functionality. A few also mentioned the modem's size and the need for sufficient channels for optimal performance.

This summary was generated by AI based on customer reviews.

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.
Page 9 Showing 161-180 of 324 reviews
  • Rated 5 out of 5 stars

    Motorola-MB76121

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    Posted . Owned for 1 year when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great modem! So far no lagging when streaming. Very pleased with my purchase!

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Great Buy

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Should have purchased a modem a long time ago instead of renting one from our carrier for 15.00 monthly. This is definitely giving us fantastic internet quality. Highly recommend.

    I would recommend this to a friend
  • Pros mentioned:
    Setup, Speed

    Rated 5 out of 5 stars

    nice and easy

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very easy to set up with RCN Speed equal or just a bit better compared to the rcn modem

    I would recommend this to a friend
  • Pros mentioned:
    Performance

    Rated 5 out of 5 stars

    Great modem, get value, get quailty & performance

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Incredible value, my family needed a new modem and after a lot of review online this was the best value and performance. I have not had to manually reboot this modem even once in 4 months! The online activation through Comcast was super easy and was up and running quickly. We have a lot of devices and the 8 upstream/24 downstream have really helped out congestion. Highly recommend

    I would recommend this to a friend
  • Pros mentioned:
    Performance, Setup

    Rated 5 out of 5 stars

    Works flawlessly

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    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Solid Performance. Easy Setup. No issues whatsoever.

    I would recommend this to a friend
  • Pros mentioned:
    Speed

    Rated 5 out of 5 stars

    Fits my needs

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This modem doubled my download and upload speeds. I was paying for a service that provided the speeds that this modem reaches. My old modem couldn’t reach half the speeds and constantly needed to be reset. Now I get the service I am paying for. Great modem!

    I would recommend this to a friend
  • Cons mentioned:
    Wifi

    Rated 4 out of 5 stars

    Good multiple WiFi connected devices

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this item because I wanted to upgrade my current modem. Only reason I got this modem is because my old modem was only 8x4 channels. This one had double the channels which I thought would be good enough for my smart home. I was going to purchase a separate router anyways but the fact that this modem didn’t have NO WiFi signal was a little disappointing. But the router I got is doing the job. So if you’re looking to upgrade your WiFi signal I suggest purchasing a good router and use this modem to get the signal to the router with Ethernet cable.

    I would recommend this to a friend
  • Pros mentioned:
    Speed

    Rated 5 out of 5 stars

    Great modem!

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Quality modem that gives me a rock-solid stable 200mbps connection, even when my neighbors complain about poor speeds from the same ISP. Buy your own modem, save on the monthly rental fees, and enjoy much better internet!

    I would recommend this to a friend
  • Pros mentioned:
    Speed

    Rated 5 out of 5 stars

    Love it

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It's actually pretty good no longer losing internet on any platform then the actual speed test for I don't lose any packets when I was using the spectrum router yeah I lost like 50 packets per time I did a speed test sometimes even 100 so I'm pretty happy with my purchase

    I would recommend this to a friend
  • Pros mentioned:
    Performance, Setup

    Rated 5 out of 5 stars

    Good Modem

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy installation and activation. Works great....

    I would recommend this to a friend
  • Pros mentioned:
    Speed

    Rated 5 out of 5 stars

    Great modem

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    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great modem for the price and high speeds. Recommend for plans <500 mbps

    I would recommend this to a friend
  • Pros mentioned:
    Performance, Setup

    Rated 5 out of 5 stars

    Works great.

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy set up. So far so good with it. Have not had to reset at all.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Excellent Modem

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Had to change my older modem since Comcast stopped supporting that specific model Pretty easy to install and Doubled my download speed under the same plan

    I would recommend this to a friend
  • Cons mentioned:
    Channels

    Rated 5 out of 5 stars

    Excellent cable modem

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This Motorola cable modem replaced my 5-year old Arris SBG6782 modem-router combo that had at least one disconnection per day. I haven't had any disconnections with the new Motorola, possibly because it supports 24x8 channel bonding. My old modem only had 16x4, which I hear some ISPs are no longer supporting. Great modem at a great price!

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Motorola rockn rolla

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great buy and it’s smooth working router works great and easy to set up.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Works as intended.

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    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Worked fine, no performance or noticable difference with the supplied Modem from Spectrum.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Great Product

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great product but I decided to upgrade from 3.0 to the 3.1 just to protect against future changes to my Internet service.

    I would recommend this to a friend
  • Pros mentioned:
    Setup

    Rated 4 out of 5 stars

    Does the job; stable design

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Modem setup was easy. It has an interactive program where you can choose from cable ISPs. I had to reset the router to recognize the dynamic IP through the modem, but that’s on the router. A subsequent reboot when I switched out a new surge protector did not require a router reset. The modem is doing it’s job. I like the “tower” footprint of this modem. It takes less space on the desk and has remained stable on the surface.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Rock Solid Reliable

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    We were having constant internet disruptions with Spectrum's crappy modem. After multiple technician visits they claimed everything was working fine so it had to be our router. I wasted time and money replacing the router and the disruptions continued until I installed this modem. It's rock solid reliable and I don't have to rely on Spectrum's incompetent technicians and their garbage modem.

    I would recommend this to a friend
  • Pros mentioned:
    Performance

    Rated 4 out of 5 stars

    Apparently a good modem.

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    it's a cable modem; works fine with my 300Mbps xfinity/commie-cast connection . . . which shouldn't be stretch for its abilities. The main point is: 1) i save $14/mnth compared to the Commi-cast modem; and 2) i could install a very much better phased-array router that covers the whole house.

    I would recommend this to a friend