Skip to contentGo to Product Search
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
$649.98

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 33 Showing 641-660 of 986 reviews

  • Samsunv S21

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

    I have been wanting this phone ever since it came out. I finally bought it and I love it. Lots of features not on my Galaxy 8

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

    I would recommend this to a friend

  • Quality phone

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

    Love this new phone. The employee was able to transfer all data from old phone to the new one and it is working well

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

    I would recommend this to a friend

  • Best phone on the market. Excellent product

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

    Excellent product. Superior quality. Best phone on the market. Excellent camera and quality pictures and videos.

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

    I would recommend this to a friend

  • Upgrade to my Note 8

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

    A very needed upgrade. My Note 8 needed to be retired. This fit all of my requirements. A very acceptable upgrade.

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

    I would recommend this to a friend

  • New phone

    |
    |
    Posted . Owned for 8 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Phone and I sufficient 5G Galaxy 21 very cool nice very useful and helpful everything's up very good item

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

    I would recommend this to a friend

  • TIGHT

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

    I LOVE THE COLORS OF THESE PHONES. THEY ARE SO MULTICOLORED. CANT WAIT TO UP GRADE.

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

    I would recommend this to a friend

  • Extreamly satisfied

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

    Josh... was very professional, a great employee Bust Buy loosing a great employee because the location closing.

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

    I would recommend this to a friend

  • S21 Ultra

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

    The phone is great. Battery life seems to be great too. Camera is excellent. Display is large and clear.

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

    I would recommend this to a friend

  • Amazing phone

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

    Switched back to android again after owning every phone past the X and would not think of switching back.

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

    I would recommend this to a friend

  • Must have

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

    This phone is amazing. Ive only had it for about 2 weeks and I absolutely love it. The only thing I wish the battery last longer! Other than that its a must have for android users.

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

    I would recommend this to a friend

  • Love this phone

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

    Love this phone especially the new options with video and pictures you van remove objects you don't want in your picture

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

    I would recommend this to a friend

  • Great Phone

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

    I love this phone! Also I love the fact that if I decide to switch services, I won't have to get a new phone.

    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.

    Really good phone has good quality and is 5G and its faster, the photos that are taken come out very clear and pretty.

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

    I would recommend this to a friend

  • Awe Phone

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

    Awesome service. Awesome camera. Sleek design and vibrant display. Fast user interface. By far best phone on market

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

    I would recommend this to a friend

  • Try to compare with note series or the S22

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

    I would recommend galaxy note 20 ultra over this or the successor S22 but not these. It is ok but has pros and cons. Compare before u buy.

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

    No, I would not 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

  • Power

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

    Its the best phone ever i recommend this to everyone in the world

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

    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

  • good phone

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

    great phone , pictures are not as good as i was expecting, if someone moves they come out blurry

    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
Page 33, Showing 641-660 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.