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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

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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 15 Showing 281-300 of 324 reviews
  • Rated 4 out of 5 stars

    Solid buy

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    Posted . Owned for 11 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this to supplement the modem I was renting through my internet service provider, as I would enable me to get more out of the plan I was paying for. Definitely smoother connection and less lag.

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    Great until it wasn't

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

    Device inexplicably stopped working after less than 90 days of use despite being attached to an APC UPS battery backup + surge protector for its entire operational life.

    No, I would not recommend this to a friend
  • Rated 5 out of 5 stars

    Modem

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

    Bought this to help boost the signal in the house and that is exactly what it has done for us.

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

    Solid cable modem at great price

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

    Very solid cable modem. Works perfectly with Spectrum service. Great value based on price paid.

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

    No buffering

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    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Finally watching 4K without buffering. Every other one was bad.

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Cable modem keeps dropping to half speed!

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

    This cable modem bites. I replaced the cable company's provided modem with this one. What a mistake. I'm supposed to receive ≥100 Mbps of data, and I register that when I reboot this modem. But after a short time later, it drops down to 50 Mbps. I reboot it and it does the same thing. Going back to cable company provided modem.

    No, I would not recommend this to a friend
  • Rated 5 out of 5 stars

    compatible with RCN

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

    delivers good connection to the wifi router. Have RCN and is compatible. Good value too.

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

    Make a difference

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

    We purchased this to replace the slow cable one, and wow did it make a difference.

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

    Best Buy still the best

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Excellent services Professional sales - everything perfectly calculated I got my item on time

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

    Review

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

    Great product real easy installation and great customer service

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

    DANTSR

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

    Good working machine and very easy to install would tell everyone to buy one

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

    Working great so far

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

    Good overall product so far although I haven’t noticed any change in speed from previous SB6141 modem. Also this one you cannot turn off the LED vs the older Motorola had that feature.

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

    Great Modem

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

    It's a great product but it does not support 1Gbps per the Comcast rep. If you want less than 1G speed then it's a great modem. Works well.

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

    modem

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

    overall a solid modem with reliable download speeds.

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

    NA

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    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    had to return the modem it as its not compatible with AT&T

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

    Great

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    Posted . Owned for 10 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works great. Much better value than renting one from my internet provider.

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

    Perfectly fine.

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

    It's perfectly fine. Wish it had more ethernet ports on the back, but I guess that's the difference between this and pricier modems.

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

    Average

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

    I’ve had to reboot the device twice since purchase (no WiFi signal), no idea where was the source of the problem (device or ISP provider).

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

    Motorola - 24 x 8 DOCSIS 3.0 Cable Modem

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

    Motorola is always putting out great modems over the years/

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

    If you know what this is...

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

    If you know what you're getting, not a bad choice.

    I would recommend this to a friend