Galaxy S21 Ultra 5GBlack • 512 GB • Dual Physical SIM + eSIM

(6,516 reviews)

€355.00

Save €1,084.00

Free delivery by 19 - 22 Jun

Express delivery by 16-17 Jun from €5.00

Restored professionally

Based on up to 100 points of inspection

Customer reviews for Galaxy S21 Ultra 5G

Overall rating

6,516 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

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
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
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
Beauty ezinne J.
Verified purchase
Reviewed 29/10/2023, Ireland.
The phone arrived on time and it's worth the price. It had just few scratches (because I selected the fair quality) which won't be visible when in a phone pouch. Overall, I'm satisfied and glad to save money while living sustainably.
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
10/10/2023
Mantas K.
Verified purchase
Reviewed 24/03/2024, Ireland.
I purchased the Galaxy S21 Ultra 512GB model in good condition and it did arrive in good condition indeed. Screen - mint condition. I'm very happy, only thing is I had to get a fast charger for it. Also, battery is somewhat average but in fairness I didn't expect it to be much better anyway (lasts about a day with medium usage). Shopping experience was absolutely fantastic 👌 💯 I would highly recommend this company to anyone.
Galaxy S21 Ultra 5G 512GB - Silver - Unlocked - Dual-SIM
Galaxy S21 Ultra 5G 512GB - Silver - Unlocked - Dual-SIM
Condition
Good
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
12/03/2024
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

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

Durability
Overall performance
Camera
Screen quality

0,89 cmDepth
BlackColour
Samsung Galaxy SSerie
512 GBStorage
7,56 cmWidth
SM-G998B/DSManufacturer Ref
Phantom BlackColor (official name)
16 GBMemory (GB)
1440 x 3200Resolution

The Samsung Galaxy S21 Ultra 5G is a flagship smartphone that showcases Samsung's commitment to innovation and high performance. Released in January 2021, it remains a top choice for users seeking a premium experience with advanced features.

Key features:

Display: 6.8-inch Dynamic AMOLED 2X, QHD+ resolution
Processor: Exynos 2100 (international) / Snapdragon 888 (USA)
Camera: Quad-camera system with a 108MP wide lens, 12MP ultra-wide, and dual 10MP telephoto lenses
Connectivity: 5G compatible, ensuring ultra-fast downloads and low-latency performance
Operating System: Ships with Android 11, upgradable to the latest versions

Who is this for?

The Samsung Galaxy S21 Ultra 5G is ideal for professionals, content creators, and tech enthusiasts who demand high-quality photography, powerful performance, and a stunning display. It’s perfect for users who want the best multimedia experience and multitasking capabilities in a smartphone.

Pros & Cons: Pros Cons Exceptional camera quality with versatile shooting options. Large size may not be comfortable for all users. Stunning display with high refresh rate. No expandable storage option available.
Why refurbished?

Choosing a refurbished Samsung Galaxy S21 Ultra 5G allows you to enjoy flagship features while being eco-conscious. Back Market ensures each device undergoes rigorous testing to meet high-quality standards. Learn more about our quality standards.

Depth: 0,89 cm
Colour: Black
Serie: Samsung Galaxy S
Storage: 512 GB
Width: 7,56 cm
Manufacturer Ref: SM-G998B/DS
Color (official name): Phantom Black
Memory (GB): 16 GB
Resolution: 1440 x 3200
Compatible with latest Update: Yes
Foldable: No
Network: 5G
SIM card: Dual Physical SIM + eSIM
SAR body part: 2,56
SAR body: 1,58
Screen size (in): 6.8
Front camera: 40 megapixels
Model: Galaxy S21 Ultra 5G
Weight: 227 g
SD Card Slot: No
Screen type: Dynamic AMOLED 2X
Carrier compatibility: Unlocked
Brand: Samsung
Main camera: 108 megapixels
OS: Android
SAR head: 0,714
Height: 16,15 cm
Year of Release: 2021

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Galaxy S21 Ultra 5GBlack • 512 GB • Dual Physical SIM + eSIM

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Customer reviews for Galaxy S21 Ultra 5G

Overall rating

Rating details

Reviews

Reviews

Theresa M.

Adam D.

Corey O.

John D.

Beauty ezinne J.

Mantas K.

Haitam K.

Popular searches

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

Durability

Overall performance

Camera

Screen quality

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