Free delivery by 28 - 29 Oct
Choose location
Suggested searches
Items
Suggested searches
Items
Popular searches
All guaranteed 100% functional
1 / 3.
1 / 3.
Galaxy S21 Ultra 5G
- Fair
- Standard battery
- 256 GB
- Dual Physical SIM + eSIM
- Black
€313.00
Save €1,285.00
Proudly refurbished by Alloccaz (France)
Free delivery by 28 - 29 Oct
Comes with
Compatible charging cable
Often bought together
Galaxy S21 Ultra 5G
Black • 256 GB • Dual Physical SIM + eSIM
Refurbished price:€313.00
€1,598.00 newVersus €1,598.00 new
Total price: €336.99
These items might be sold and delivered by different sellers.
Customer reviews for Galaxy S21 Ultra 5G
Overall rating
4.3/54.3/56,670 verified reviewsRating details
Accessories
4.1/5
Appearance
4.4/5
Battery
4.1/5
Lens & Camera
4.5/5
Overall performance
4.3/5
Packaging
4.4/5
Shipping
4.6/5
Reviews
Reviews
James L.
Verified purchaseReviewed 05/08/2026, Ireland.
4.9/5I was really surprised to see my new phone was in absolute perfect condition. I really had to examine the phone thoroughly to find even the tiniest of a mark. The shipping was bang on time and the packaging was very good too. I'll definitely be using Back Market next time also.
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Condition
Good
Purchased
24/07/2026
Peter L.
Verified purchaseReviewed 22/08/2026, Ireland.
4.9/5Looks brand new, even though I ordered fair condition. Everything is perfect. Very happy with my purchase ☺️
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Condition
Fair
Purchased
15/08/2026
John D.
Verified purchaseReviewed 12/12/2024, Ireland.
4.6/5great phone, like new. the only problem I have us when I was ordering I looked up the specs and it said it was a G988b, which is the European version firmware. I wanted this because I had already bought the same phone from refurbed.ie and they sent me a G988u1 phone, the problem was it's on US Firmware and I could not get it to update to latest firmware. they took it back and promised me a replacement but never followed through. this phone even though it's set to USA region firmware has updated ok, but only downside it's only got American English version. I think you should only sell phones that have regional based firmware to the same firmeare region. for example I should have received a Gʻ988B phone.
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Condition
Excellent
Purchased
24/11/2024
Adam D.
Verified purchaseReviewed 05/04/2026, Ireland.
5/5Amazing phone it's just like brand new im well happy with it . I'll definitely recommend back market to friends.
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Condition
Good
Purchased
26/03/2026
Theresa M.
Verified purchaseReviewed 05/01/2025, Ireland.
5/5Great service.. quick delivery.. ONLY gripe if I had one was that we can't use Klarna on the page, which would have made additional purchases simpler. We had to use refurbed as they do offer that service and as a household of twelve we buy a LOT of phones so would make good business sense to adopt it
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Condition
Excellent
Purchased
21/12/2024
Aaron B.
Verified purchaseReviewed 20/01/2025, Ireland.
4.2/5Slight scratch at bottom of screen but apart from that works perfect
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Condition
Good
Purchased
31/12/2024
Cathal N.
Verified purchaseReviewed 19/01/2025, Ireland.
5/5Seems good so far, nice phone
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Condition
Excellent
Purchased
08/01/2025
Popular searches
Everything you ever wanted to know about the Galaxy S21 Ultra 5G
Durability
Overall performance
Camera
Screen quality
NoSD Card Slot
NoFoldable
40 megapixelsFront camera
7,56 cmWidth
2,56SAR body part
2021Year of Release
12 GBMemory (GB)
AndroidOS
YesCompatible with latest Update
The Galaxy S21 Ultra 5G is a flagship smartphone from Samsung that continues to impress with its advanced features and powerful performance. Released in January 2021, this device is designed for users who demand the best in photography, display quality, and overall functionality.
Key features:- Release Date: January 2021
- Display: 6.8-inch Dynamic AMOLED 2X, QHD+ resolution
- Processor: Exynos 2100 (International) / Snapdragon 888 (USA)
- Camera: Quad-camera system with a 108MP main sensor and 100x Space Zoom
- Connectivity: 5G compatible for ultra-fast downloads and low-latency performance.
The Galaxy S21 Ultra 5G is ideal for professionals, photographers, and tech enthusiasts who require a high-performance smartphone with exceptional camera capabilities and a stunning display. Its versatility makes it suitable for both work and play, providing an immersive experience for content consumption and creation.
Pros & Cons: Pros Cons Exceptional camera performance with versatile shooting options. Large and heavy compared to other smartphones. Stunning display quality with vibrant colours and high resolution. Premium price point for flagship features.Why refurbished?
Choosing a refurbished Galaxy S21 Ultra 5G allows you to experience top-tier technology while being eco-conscious. Back Market ensures that all refurbished devices undergo rigorous testing for quality and functionality. Learn more about our quality standards.
- SD Card Slot
- No
- Foldable
- No
- Front camera
- 40 megapixels
- Width
- 7,56 cm
- SAR body part
- 2,56
- Year of Release
- 2021
- Memory (GB)
- 12 GB
- OS
- Android
- Compatible with latest Update
- Yes
- SIM card
- Dual Physical SIM + eSIM
- Storage
- 256 GB
- Resolution
- 1440 x 3200
- Height
- 16,15 cm
- Camera Type
- Quadruple (4x)
- Screen size (in)
- 6.8
- Connector
- USB-C
- Network
- 5G
- Weight
- 227 g
- Screen type
- Dynamic AMOLED 2X
- Model
- Galaxy S21 Ultra 5G
- Colour
- Black
- Depth
- 0,89 cm
- Main camera
- 108 megapixels
- Carrier compatibility
- Unlocked
- Serie
- Samsung Galaxy S
- Color (official name)
- Phantom black
- SAR body
- 1,58
- Brand
- Samsung
- SAR head
- 0,714
- Manufacturer Ref
- SM-G998B/DS
Galaxy S21 Ultra 5G
Related articles
SamsungIs the Samsung S9 still a good phone to buy? | Back Market
SamsungSamsung Galaxy S22: Price, Release Date and Technical Specifications | Back Market
SamsungSamsung S10e review – Retro Cool or Just Old? | Back Market
SamsungSamsung Galaxy S23 review: display, design, performance and camera specs | Back Market
SamsungThe best Samsung phone in 2025 | Back Market
SamsungOur review of the Samsung Galaxy A71 | Back Market
Samsung TabSamsung Galaxy Tab S9 series first look review: which one should you get? | Back Market
Welcome to Back Market
The best prices for high-quality renewed goods by refurbishers we’ve checked and vetted. We don’t mind if you Google us.
Get to know us
- 1-year minimum warranty
- Free delivery on all orders
- Free 30-day returns
- Excellent customer support
product-page-e2e-translation-check-en-ie