Galaxy S21 Ultra 5GBlack • 128 GB • Physical SIM + eSIM

(6,633 reviews)

€325.00

Save €972.00

Free delivery by 11 - 12 Aug

Restored professionally

Based on up to 100 points of inspection

Customer reviews for Galaxy S21 Ultra 5G

Overall rating

6,633 verified reviews

Rating 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

James L.
Verified purchase
Reviewed 05/08/2026, Ireland.
I 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
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
24/07/2026
Theresa M.
Verified purchase
Reviewed 05/01/2025, Ireland.
Great 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
Almost no signs of wear. The body may have very light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
21/12/2024
Adam D.
Verified purchase
Reviewed 05/04/2026, Ireland.
Amazing 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
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
26/03/2026
John D.
Verified purchase
Reviewed 12/12/2024, Ireland.
great 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
Almost no signs of wear. The body may have very light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
24/11/2024
Corey O.
Verified purchase
Reviewed 17/11/2023, Ireland.
I ordered a silver 128gb S21 Ultra off this site, I got it in fair condition expecting maybe a couple of scratches or dents. the phone was in absolutely FLAWLESS condition, I had to look for anything off, nothing. best refurbished device I ever bought. I recommend Backmarket and the reseller ReMarket 100%! fast delivery and great service!
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
14/11/2023
Haitam K.
Verified purchase
Reviewed 30/03/2025, Ireland.
My S21 ULTRA is doing great and matches the description. Thank you back market for your honesty and your service
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Galaxy S21 Ultra 5G 256GB - Black - Unlocked
Condition
Good
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
14/03/2025
James R.
Verified purchase
Reviewed 01/12/2024, Ireland.
only looked at phone ,quality perfect,as I got for a xmas gift, I havent done anthing else with it. will let you know further after xmas day
Galaxy S21 Ultra 5G 512GB - Black - Unlocked
Galaxy S21 Ultra 5G 512GB - Black - Unlocked
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
19/11/2024

Everything you ever wanted to know about the Galaxy S21 Ultra 5G

Durability
Overall performance
Camera
Screen quality

Physical SIM + eSIMSIM card
Phantom BlackColor (official name)
1440 x 3200Resolution
12 GBMemory (GB)
1.58SAR body
Samsung Galaxy SSerie
5GNetwork
40 megapixelsFront camera
Quadruple (4x)Camera Type

The Galaxy S21 Ultra 5G is a premium smartphone that continues to impress with its top-tier specifications and features. Launched in January 2021, it remains a strong contender for those seeking a high-performance device with advanced capabilities.

Key features:

Release Date: January 2021
Display: 6.8-inch Dynamic AMOLED 2X, QHD+ resolution
Processor: Exynos 2100 or Snapdragon 888 (depending on region)
Camera: Quad-camera system with 108MP wide lens
Connectivity: 5G compatible ensuring ultra-fast downloads and low-latency performance.

Who is this for?

The Galaxy S21 Ultra 5G is ideal for professionals, photographers, and tech enthusiasts who demand a robust camera system and a stunning display for media consumption. It’s also suitable for gamers and multitaskers looking for a device that can handle demanding applications smoothly.

Pros & Cons: Pros Cons Exceptional camera capabilities, including 100x Space Zoom. Size and weight may be cumbersome for some users. Stunning display with vibrant colours and high resolution. Premium price point compared to other smartphones.
Why refurbished?

Choosing a refurbished Galaxy S21 Ultra 5G allows you to enjoy flagship features without the new device price tag. Back Market ensures all refurbished devices undergo strict quality checks to guarantee reliability and performance. Learn more about our quality standards.

SIM card: Physical SIM + eSIM
Color (official name): Phantom Black
Resolution: 1440 x 3200
Memory (GB): 12 GB
SAR body: 1.58
Serie: Samsung Galaxy S
Network: 5G
Front camera: 40 megapixels
Camera Type: Quadruple (4x)
Storage: 128 GB
OS: Android
SAR head: 0.71
Brand: Samsung
Year of Release: 2021
Colour: Black
Foldable: No
Main camera: 108 megapixels
Screen type: Dynamic AMOLED 2X
Weight: 227 g
Compatible with latest Update: Yes
Carrier compatibility: Unlocked
SD Card Slot: No
Screen size (in): 6.8
Connector: USB-C
Manufacturer Ref: SM-G998B
Model: Galaxy S21 Ultra 5G

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Galaxy S21 Ultra 5GBlack • 128 GB • Physical SIM + eSIM

Galaxy S21 Ultra 5GBlack • 128 GB • Physical SIM + eSIM

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Customer reviews for Galaxy S21 Ultra 5G

Overall rating

Rating details

Reviews

Reviews

James L.

Theresa M.

Adam D.

John D.

Corey O.

Haitam K.

James R.

Popular searches

Everything you ever wanted to know about the Galaxy S21 Ultra 5G

Durability

Overall performance

Camera

Screen quality

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