Skip to contentGo to Product SearchGo to Footer
Gift Ideas
Main Content

Customer Ratings & Reviews

No content
  • Front. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 11. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 12. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 13. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 14. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 15. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 16. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 17. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Alt View 18. Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked).
  • Meet Galaxy S21 Ultra 5G video 0 minutes 30 seconds

Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

Model:
SM-G998UZKAXAA
SKU:
12069370
Your price for this item is $649.98
The comparable value price is $799.99

Customer reviews

Rating 4.6 out of 5 stars with 986 reviews

Rating Filter

Rating by feature

  • Display Quality

    Rating 4.8 out of 5 stars

  • Camera

    Rating 4.8 out of 5 stars

  • Battery Life

    Rating 4.7 out of 5 stars

91%
would recommend
to a friend
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 34 Showing 661-680 of 986 reviews

  • Best phone Ever

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

    Love My phone and it takes Awesome Pics not to mention the durability

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy

    I would recommend this to a friend

  • Awesome phone

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

    Amazing phone. Upgraded from a galaxy s8+, and the difference is astounding. Everything about the phone is great.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Great But

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

    Top Notch, what can you complain about on the unit. Dumb pen/case need. Would rather buy similar spec note with pen in phone. Also 128 storage only BB option??? not the best

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    No, I would not recommend this to a friend

  • Great phone

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

    Bought it fir my wife, she said will never go back to IPhone, learning something new every day, great phone.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Samsung Galaxy S21 Ultra

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

    Love my phone. The picture quality is excellent. This is by far the best phone out of all the Galaxy's I've had.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Galaxy

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

    It works good having problem it freezes hear and there and picture quality isn't the best. But not work paying 200 dollars to replace it.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy

    I would recommend this to a friend

  • The best phone

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

    I love this phone. I would never buy an iPhone. There is just no way. This phone is so much better.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Silver

    I would recommend this to a friend

  • New cell phone

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

    Not the phone I originally went to get but I'm glad I got this one instead. I absolutely love it.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy

    I would recommend this to a friend

  • Great phone

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

    Great phone, i highly recommend it from switching from iphone aftee using it for the last 10 years

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy

    I would recommend this to a friend

  • Galaxy S21 ULTRA

    |
    |
    Posted . Owned for 7 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    SAMSUNG GALAXY S21 ULTRA IS FENOMENAL, IS SOLID, THE PICTURE QUALITY IS ESPECTACULAR.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Mobile Phone Galaxy S21

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

    I bought the phone for my daddy as a gift to suit his everyday needs, and he enjoyed it very much.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Pleasantly Surprised

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

    Amazingly fast, brilliant display. Everything I've wanted in a phone and tablet before finally in one place.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Silver

    I would recommend this to a friend

  • Samsung Satisfied

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

    Fast processing, brilliant display. Everything I've looked for in a tablet and a phone finally in one place.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Phone review

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

    So far, so good. Hopefully the battery will not swell like my Galaxy 8 did. Picture quality is great.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Phone

    |
    |
    Posted . Owned for 7 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    An amazing phone absolutely love it! Very durable and does everything i need it for

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Great Cellphone

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

    What can I say, one of the best Cellphones you can get. Photography is awesome pictures. Five Stars

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • Love it but dissapointed at the same time

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

    Love it but disappointed that it's defective from day 1, getting a new phone. Thanks BB!!

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Silver

    I would recommend this to a friend

  • Android Lover

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

    Great Product. Been using out for over a year now. Love it!

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black

    I would recommend this to a friend

  • S21 Ultra

    |
    |
    Posted . Owned for 7 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I live this phone! Great photos, easy navigation and just a fun experience using it!

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy

    I would recommend this to a friend

  • Galaxy S21 Ultra

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

    Perfect for my new phone. Unlocked and ready for use. Great purchase.

    This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy

    I would recommend this to a friend
Page 34, Showing 661-680 of 986 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.