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Proudly refurbished by RePhoneMe
Compatible charging cable
832 verified reviews in the last 24 months.
Olivia L.
Purchased on March 23, 2025
Verified purchaseI was a bit hesitant to order my phone at first since I’d never bought a refurbished device before, and I had seen a few negative reviews on social media. But I decided to give it a try, and I’m so glad I did! The shipping was quick, the phone looks brand new, and it runs perfectly — you’d never guess it’s refurbished. I’ll definitely be ordering again!
Condition
Excellent
Item
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Reviewed in the United States on April 7, 2025
Michael t W.
Purchased on September 11, 2024
Verified purchaseThis is my fourth phone Ive gotten from backmarket!! WHY? Because searching the net up and down ..Backmarket alwasy seemed tpo have the best deal.One big reason is the first two had clear new screens and the phone was refurbished.This time i got a galaxy s21..It is brand new looking..Super good phone.Super happy-PEACE
Condition
Good
Item
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Reviewed in the United States on November 11, 2024
Michael E.
Purchased on February 2, 2024
Verified purchaseThe Samsung S21 Ultra appears to be fine in the two weeks since we received it and was as promised. Ordering was easy and delivery was as expected. Our trade-in offer was much lower than we had anticipated ($25.00) for a phone in complete working order without problems. I have previously purchased certified, refurbished smartphones directly from Samsung and felt we received a much better & fairer trade-in offer. While the price of the S21 Ultra was cheaper from Back Market, I believe that I might have fared better buying from Samsung in terms of overall cost. I will research more closely when it's time for our next purchase.
Condition
Excellent
Item
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Reviewed in the United States on February 18, 2024
Jennifer U.
Purchased on October 29, 2023
Verified purchaseI was very very skeptical about buying a refurbished phone. I debated about it for months. When my son bought a refurbished iPhone that looked brand new, and worked perfectly I decided to go for it! I was not disappointed! I got the Samsung galaxy S21 Ultra in excellent condition. It came quicker than expected and there were no noticeable scratches or dings on the back, there was a tiny scratch on the screen which you cannot even see with the screen on. Overall I am super satisfied with the phone, I got a great deal on an awesome phone! I will definitely buy from Backmarket again!
Condition
Fair
Item
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Reviewed in the United States on November 12, 2023
Gerald P.
Purchased on March 10, 2024
Verified purchaseTrading in my beat-up S21Ultra with damaged screen for this excellent condition replacement enabled me to, in turn, take advantage of trade-in promotion at Samsung Store. My old phone was worthless for trade-in otherwise. The refurbisher who purchased my trade-in tried to claim that it didn't take a charge... but with my photos in hand, the Backmarket staff swiftly dealt with that. Be sure to take photos of live phone, and of each stage of packaging, so that Backmarket is able to support you in case of dispute. Great customer service!
Condition
Excellent
Item
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Reviewed in the United States on March 24, 2024
Geraldine M.
Purchased on January 23, 2025
Verified purchaseThe Galaxy S21 Ultra 5G 128G Black is a nice phone. It had one slight scratch although the description said Excellent Condition with no visible marks. Both phones had visible marks. We liked the phone in spite of this.
Condition
Premium
Item
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Reviewed in the United States on February 10, 2025
Sheddrick S.
Purchased on December 20, 2024
Verified purchaseNo complaints here. Came as described, quality holds up extremely well compared to newer gens, definitely worth the price
Condition
Excellent
Item
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Reviewed in the United States on January 7, 2025
Here’s what you help prevent on average by choosing a reborn smartphone over a brand new one.
That's like driving an SUV from NYC to Chicago.
That’s around the weight of a baseball.
That's like 20 dogs digging in your yard for a week.
That's like running a faucet for 3 days
SM-G998UZKAXAAManufacturing part numbers (MPN)
BlackColor
6.8Screen size (inches)
Galaxy S21 Ultra 5GModel
AndroidOS
1440 x 3200Resolution
USB-CConnector
UnlockedCarrier compatibility
128 GBStorage
The Galaxy S21 Ultra 5G is a high-end flagship smartphone that was released in early 2021. It is known for its powerful performance, versatile camera system, and 5G connectivity. This model is the 128GB variant, offering ample storage for everyday use. As a refurbished device, it provides a cost-effective option for those seeking premium features at a lower price point.
Key features:The Galaxy S21 Ultra 5G is suitable for users who want a premium Android device with a large, vibrant display, advanced photography capabilities, and 5G support. It’s ideal for tech enthusiasts, content creators, or anyone needing a powerful, versatile smartphone.
Pros & Cons:Pros | Cons |
---|---|
Large, high-resolution display with 120Hz refresh rate. | Bulkier size may be less comfortable for one-handed use. |
Advanced quad-camera system for versatile photography. | Battery life varies depending on usage, but some users may find it less enduring under heavy load. |
Choosing a refurbished Galaxy S21 Ultra 5G allows you to access a premium device at a more accessible price. Each device is tested and certified to meet quality standards, ensuring reliable performance. Refurbished devices from Back Market undergo rigorous quality checks to guarantee top condition. Learn more about our quality standards.
Manufacturing part numbers (MPN) | SM-G998UZKAXAA |
Color | Black |
Screen size (inches) | 6.8 |
Model | Galaxy S21 Ultra 5G |
OS | Android |
Resolution | 1440 x 3200 |
Connector | USB-C |
Carrier compatibility | Unlocked |
Storage | 128 GB |
Memory | 12 GB |
Screen type | Dynamic AMOLED 2X |
Network | 5G |
Manufacturer Ref. | SM-G998U1 |
Memory Card Slot | No |
Verizon compatible | Yes |
AT&T compatible | Yes |
T-Mobile compatible | Yes |
Last OS Compatibility | Yes |
Foldable | No |
Front camera | 40 megapixels |
SAR head | 0.77 |
SAR body | 1.02 |
Series | Samsung Galaxy S |
SIM card | Physical SIM + eSIM |
Retro tech | No |
Main camera | 108 megapixels |
Color (official name) | Phantom Black |
Release Year | 2021 |
Company name | Samsung Electronics |
Company email address | support@samsung.com |
Company postal address | Samsung House, 1000 Hillswood Drive, Chertsey, Surrey, KT16 0PS, UK |
Brand | Samsung |
Weight | 8 oz |
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