Free delivery by 11 - 12 Nov
Choose location
Items
Suggested searches
Recent
Popular searches
Popular searches
All guaranteed 100% functional
1 / 3.
1 / 3.
Galaxy S21 Ultra 5G
- Fair
- Standard battery
- 256 GB
- Dual Physical SIM + eSIM
- Dark Blue
€315.00
Save €574.00
Proudly refurbished by Alloccaz (France)
Free delivery by 11 - 12 Nov
Comes with
Compatible charging cable
Often bought together
Galaxy S21 Ultra 5G
Dark Blue • 256 GB • Dual Physical SIM + eSIM
Refurbished price:€315.00
€889.00 newVersus €889.00 new
Total price: €339.99
These items might be sold and delivered by different sellers.
Customer reviews for Galaxy S21 Ultra 5G
Overall rating
4.3/54.3/56,537 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
12 GBMemory (GB)
1.58SAR body
Samsung Galaxy SSerie
NoSD Card Slot
40 megapixelsFront camera
SamsungBrand
Phantom NavyColor (official name)
UnlockedCarrier compatibility
Galaxy S21 Ultra 5GModel
The Galaxy S21 Ultra 5G is a flagship smartphone that continues to impress with its advanced features and performance. Launched in January 2021, it remains a top choice for users seeking a powerful device with exceptional camera capabilities and a stunning display.
Key features:- Release Date: January 2021
- Display: 6.8-inch Dynamic AMOLED 2X, QHD+ resolution
- Processor: Exynos 2100 (international) or Snapdragon 888 (USA)
- Camera: Quad-camera system with 108MP main sensor, 12MP ultra-wide, and two 10MP telephoto lenses
- Connectivity: 5G compatible for ultra-fast downloads and low-latency performance.
The Galaxy S21 Ultra 5G is ideal for photography enthusiasts, gamers, and power users who demand high performance and versatility from their smartphones. It’s particularly well-suited for professionals who need a device that can handle multitasking and content creation with ease.
Pros & Cons: Pros Cons Outstanding camera quality with versatile shooting options. Large and heavy design may not be comfortable for all users. Vibrant and immersive display with 120Hz refresh rate. Premium price point compared to other models.Why refurbished?
Choosing a refurbished Galaxy S21 Ultra 5G allows you to experience flagship features while being environmentally conscious. Back Market ensures each device is thoroughly tested and restored to excellent condition, providing you with a reliable smartphone. Learn more about our quality standards.
- Memory (GB)
- 12 GB
- SAR body
- 1.58
- Serie
- Samsung Galaxy S
- SD Card Slot
- No
- Front camera
- 40 megapixels
- Brand
- Samsung
- Color (official name)
- Phantom Navy
- Carrier compatibility
- Unlocked
- Model
- Galaxy S21 Ultra 5G
- Colour
- Dark Blue
- SAR head
- 0.71
- Foldable
- No
- Screen size (in)
- 6.8
- OS
- Android
- Network
- 5G
- Screen type
- Dynamic AMOLED 2X
- Manufacturer Ref
- SM-G998B/DS
- Resolution
- 1440 x 3200
- Main camera
- 108 megapixels
- Storage
- 256 GB
- Weight
- 227 g
- Camera Type
- Quadruple (4x)
- SIM card
- Dual Physical SIM + eSIM
- Compatible with latest Update
- Yes
- Year of Release
- 2021
- Connector
- USB-C
Galaxy S21 Ultra 5G
Related articles
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
Samsung TabSamsung Galaxy Tab S9 series first look review: which one should you get? | Back Market
SamsungOur review of the Samsung Galaxy A71 | Back Market
SamsungIs the Samsung S9 still a good phone to buy? | Back Market
SamsungSamsung Galaxy S22: Price, Release Date and Technical Specifications | 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