Galaxy S21 Ultra 5GSilver • 512 GB • Physical SIM + eSIM

Name: Galaxy S21 Ultra 5G 512GB - Silver - Unlocked
Brand: Samsung
Price: 305.99 GBP
Availability: InStock

(6,527 reviews)

£305.99

before trade-in

Save £1,227.01

Free delivery by 9 - 10 Jun

Restored professionally

Based on up to 100-points of inspection

Customer reviews for Galaxy S21 Ultra 5G

Overall rating

6,527 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

Javed S.
Verified purchase
Reviewed 07/04/2025, United Kingdom.
Ordered a "Good" quality Samsung Galaxy S21 Ultra 5g phone and surprised as its almost like a brand new phone apart from a few cosmetic dints which were expected I suppose. Still to find out how battery performs over time but my wife is quiet impressed with the phone. Would definitely buy another phone from here as they've kept the word on quality of the phone. Keep up the good work and help the planet.
Galaxy S21 Ultra 5G 256GB - Silver - Unlocked
Galaxy S21 Ultra 5G 256GB - Silver - 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
23/03/2025
Hakim A.
Verified purchase
Reviewed 13/05/2026, United Kingdom.
It is so far the best experience I had with a refurbished phone it is absolutely stunning the quality is Immaculate and the service has been fast Safe and efficient. I have recommended Back Market to my friend who bought a phone for his wife I also highly recommend this seller to anyone who wants a very good phone at a fraction of the price.
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Galaxy S21 Ultra 5G 128GB - Silver - 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
25/04/2026
Stephanie W.
Verified purchase
Reviewed 15/04/2026, United Kingdom.
Absolutely brilliant phone. I am very happy with my purchase. Samsung galaxy s21 ultra. The phone arrived in perfect condition and although I requested a phone in" good condition" I can't tell the difference from a brand new one. I would highly recommend Back market to anyone.
Galaxy S21 Ultra 5G 256GB - Dark Blue - Unlocked
Galaxy S21 Ultra 5G 256GB - Dark Blue - 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
11/04/2026
Deivids S.
Verified purchase
Reviewed 04/03/2026, United Kingdom.
Much better than previous phone, this time rear camera was refurbished right and auto focused without the onbnoxious manual tapping. Battery is solid so far and minimal scratches all for a good price :)
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
19/02/2026
Andrea N.
Verified purchase
Reviewed 31/05/2026, United Kingdom.
my device was just as described, however within a few days it was clear it had a fault with mobile data. I contacted back market via help section. I received an identical phone the next day, and once my new phone had been updated I returned the faulty one. I was amazed how easy the issue I had was felt with and sorted. excellent service and the phone is working as it should.
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Galaxy S21 Ultra 5G 128GB - Silver - 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
19/05/2026
Keith H.
Verified purchase
Reviewed 25/05/2026, United Kingdom.
We had a device delivered and it wasn't working as it should, we were away on holiday and it turned itself off and wouldn't restart. I emailed Back market and they sent out a replacement within 24 hours. Excellent customer service, we will certainly recommend and use them again.
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
14/05/2026
Michelle G.
Verified purchase
Reviewed 24/05/2026, United Kingdom.
First time I’ve ever bought from Back Market & have to honestly say the service was fantastic. The phone I got was in excellent condition, the delivery service was quick and can’t fault the company what so ever. Will definitely recommend to friends & will be using this company for my next purchase. Thank you again for amazing service.
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Galaxy S21 Ultra 5G 128GB - Silver - 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
09/05/2026

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

Durability
Overall performance
Camera
Screen quality

AndroidOS
UnlockedCarrier compatibility
2021Year of Release
16 GBMemory (GB)
1.58SAR body
108 megapixelsMain camera
227 gWeight
6.8Screen size (in)
512 GBStorage

The Galaxy S21 Ultra 5G is a premium smartphone that showcases Samsung's flagship technology. Released in January 2021, this model stands out with its impressive camera capabilities and vibrant display, making it a top choice for photography enthusiasts and power users alike.

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 108MP wide lens and 10x optical zoom
Connectivity: 5G compatible for high-speed internet access.

Who is this for?

The Galaxy S21 Ultra 5G is ideal for professionals, content creators, and tech enthusiasts who demand top-tier performance and camera quality. Its large display and powerful hardware make it suitable for multitasking and media consumption, while its advanced camera system caters to those who enjoy photography and videography.

Pros & Cons:

Pros	Cons
Exceptional camera capabilities with versatile zoom.	Bulky design may not suit all users.
Stunning display with high refresh rate.	High price point compared to other models.

Why refurbished?

Choosing a refurbished Galaxy S21 Ultra 5G allows you to experience premium features while being environmentally conscious. Each device is thoroughly tested to meet Back Market's quality standards, ensuring reliability and performance. Learn more about our quality standards.

OS: Android
Carrier compatibility: Unlocked
Year of Release: 2021
Memory (GB): 16 GB
SAR body: 1.58
Main camera: 108 megapixels
Weight: 227 g
Screen size (in): 6.8
Storage: 512 GB
SD Card Slot: No
SIM card: Physical SIM + eSIM
Manufacturer Ref: SM-G998B/DS
Colour: Silver
Resolution: 1440 x 3200
Mobile network: 5G
Compatible with latest Update: Yes
Connector: USB-C
Model: Galaxy S21 Ultra 5G
Foldable: No
Brand: Samsung
Camera Type: Quadruple (4x)
Screen type: Dynamic AMOLED 2X
Front camera: 40 megapixels
Serie: Samsung Galaxy S
SAR head: 0.71
Colour (official name): Phantom Silver

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Galaxy S21 Ultra 5GSilver • 512 GB • Physical SIM + eSIM

Galaxy S21 Ultra 5GSilver • 512 GB • Physical SIM + eSIM

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Customer reviews for Galaxy S21 Ultra 5G

Overall rating

Rating details

Reviews

Reviews

Javed S.

Hakim A.

Stephanie W.

Deivids S.

Andrea N.

Keith H.

Michelle G.

Popular searches

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

Durability

Overall performance

Camera

Screen quality

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