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Galaxy S21 5G
- Fair
- 128 GB
- Dual Physical SIM + eSIM
- Grey
£134.00
before trade-in
applies (starting at £0.49)
Save £725.00
Proudly refurbished by Next Day Mobiles LTD
Free delivery by 7 - 9 Nov
Express delivery by 6-7 Nov from £3.95
Comes with
Compatible charging cable
Often bought together
Galaxy S21 5G
Grey • 128 GB • Dual Physical SIM + eSIM
Refurbished price:£134.00
£859.00 newVersus £859.00 new
Total price: £155.99
These items might be sold and delivered by different sellers.
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- 4.3/5 (6,686)Starting at
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£1,149.00newVersus £1,149.00 new
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Pairs well with
- 4.3/5 (37)Brand new
Refurbished price:£21.99
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Customer reviews for Galaxy S21 5G
Overall rating
4.3/54.3/519,391 verified reviewsRating details
Accessories
4.1/5
Appearance
4.5/5
Battery
4/5
Lens & Camera
4.5/5
Overall performance
4.2/5
Packaging
4.5/5
Shipping
4.6/5
Reviews
Reviews
Al B.
Verified purchaseReviewed 17/04/2026, United Kingdom.
5/5Phone is in excellent condition, much better than i was expecting, I can't find a single scratch on the phone, working great, came well packaged, quick shipping to Ireland, I highly recommend this site 🌟🌟🌟🌟🌟
Galaxy S21 5G 128GB - Purple - Unlocked
See itemCondition
Fair
Purchased
14/04/2026
Kane G.
Verified purchaseReviewed 21/07/2026, United Kingdom.
5/5considering it's fair condition it's still in great condition no problems no scratches or minor damage im amazed by the s21 Samsung next step is to sort out coverage option as i don't want damage to the phone as im very clumsy sometimes great item im very thankful
Galaxy S21 5G 128GB - Grey - Unlocked
See itemCondition
Fair
Purchased
13/07/2026
William S.
Verified purchaseReviewed 15/09/2026, United Kingdom.
5/5The phone was excellent, it exceeded my expectations. I previously bought this model from you for my wife and this one is to the same high standard. I'll certainly buy from you again and wholeheartedly recommend you to prospective buyers. A well deserved thanks.
Galaxy S21 5G 128GB - Grey - Unlocked
See itemCondition
Excellent
Purchased
12/09/2026
Jenny L.
Verified purchaseReviewed 23/09/2026, United Kingdom.
4.9/5It's like brand new I couldn't find a single mark. Straight forward to use. The only thing is the battery It's not new didn't have the option at the time so doesn't last long. Overall very pleased definitely recommend Back Market 👍
Galaxy S21 5G 256GB - Grey - Unlocked
See itemCondition
Fair
Purchased
04/09/2026
Denise R.
Verified purchaseReviewed 18/06/2026, United Kingdom.
5/5phone was in great condition looked like a new phone and I liked the colour only draw back was after setting it up had to give it at least 8 software updates now phone is working like it should but I would still buy another phone from this company if I needed one their alot cheaper than some of these shops that sell used phones
Galaxy S21 5G 128GB - Purple - Unlocked
See itemCondition
Excellent
Purchased
02/06/2026
Jenny B.
Verified purchaseReviewed 08/06/2026, United Kingdom.
4.9/5Condition said it was fair but its near on perfect. Bought for my mum who is in her 80s, easy for her to navigate her way round and easy for her to use. This is the 3rd time buying from this site, wouldn't buy phones from anywhere else now. Thankyou. 😀
Galaxy S21 5G 128GB - Grey - Unlocked
See itemCondition
Fair
Purchased
24/05/2026
Matthew S.
Verified purchaseReviewed 26/04/2026, United Kingdom.
4.4/5I was a little nervous to order a refurbished phone but I've gotta say this honestly feels like brand new! There's only minor signs of wear and tear on the main body but other than that it's pretty much perfect!
Galaxy S21 5G 128GB - Grey - Unlocked
See itemCondition
Excellent
Purchased
13/04/2026
Popular searches
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Everything you ever wanted to know about the Galaxy S21 5G
Durability
Overall performance
Camera
Screen quality
Triple (3x)Camera Type
0,79 cmDepth
128 GBStorage
SamsungBrand
GreyColour
USB-CConnector
NoFoldable
1,509SAR body
8 GBMemory (GB)
The Galaxy S21 5G is a powerful smartphone that combines cutting-edge technology with a sleek design. Released in January 2021, this device remains a strong contender in the smartphone market, offering 5G connectivity and impressive camera capabilities.
Key features:- Release Date: January 2021
- Display: 6.2-inch Dynamic AMOLED 2X, FHD+ resolution
- Processor: Exynos 2100 (International) / Snapdragon 888 (USA)
- Camera: Triple-camera system with 12MP ultra-wide, 12MP wide, and 64MP telephoto lenses
- Connectivity: 5G compatible for ultra-fast downloads and low-latency performance.
The Galaxy S21 5G is ideal for users looking for a high-performance smartphone with excellent camera features. It suits students, professionals, and anyone who enjoys capturing high-quality photos and videos while staying connected with the latest technology.
Pros & Cons:| Pros | Cons |
|---|---|
| Vibrant display with 120Hz refresh rate. | No expandable storage option. |
| Versatile camera system for various photography styles. | Plastic back may feel less premium than glass alternatives. |
Why refurbished?
Choosing a refurbished Galaxy S21 5G allows you to enjoy a top-tier smartphone while being eco-conscious. Each device is thoroughly inspected and tested to meet Back Market’s quality standards, ensuring reliability. Learn more about our quality standards.
- Camera Type
- Triple (3x)
- Depth
- 0,79 cm
- Storage
- 128 GB
- Brand
- Samsung
- Colour
- Grey
- Connector
- USB-C
- Foldable
- No
- SAR body
- 1,509
- Memory (GB)
- 8 GB
- SIM card
- Dual Physical SIM + eSIM
- Width
- 7,12 cm
- Year of Release
- 2021
- Weight
- 169 g
- Compatible with latest Update
- Yes
- Manufacturer Ref
- SM-G991B/DS
- Carrier compatibility
- Unlocked
- OS
- Android
- SAR head
- 0,456
- Screen type
- Dynamic AMOLED 2X
- Model
- Galaxy S21 5G
- Serie
- Samsung Galaxy S
- Mobile network
- 5G
- Screen size (in)
- 6.2
- Resolution
- 1080 x 2400
- SD Card Slot
- No
- Front camera
- 10 megapixels
- Main camera
- 12 megapixels
- Colour (official name)
- Phantom gray
- Height
- 15,17 cm
Galaxy S21 5G
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