Free delivery by 19 - 20 Oct
Suggested searches
Items
Suggested searches
Items
Popular searches
All guaranteed 100% functional
1 / 3.
1 / 3.
Galaxy S21 5G
- Fair
- Standard battery
- 256 GB
- Physical SIM + eSIM
- Grey
£190.99
before trade-in
applies (starting at £0.49)
Save £903.01
Proudly refurbished by idoodirect
Free delivery by 19 - 20 Oct
Comes with
Compatible charging cable
Often bought together
Galaxy S21 5G
Grey • 256 GB • Physical SIM + eSIM
Refurbished price:£190.99
£1,094.00 newVersus £1,094.00 new
Total price: £212.98
These items might be sold and delivered by different sellers.
Customer reviews for Galaxy S21 5G
Overall rating
4.3/54.3/519,357 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
Galaxy S21 5G 128GB - Purple - Unlocked
Condition
Fair
Purchased
14/04/2026
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
Galaxy S21 5G 256GB - Grey - Unlocked
Condition
Fair
Purchased
04/09/2026
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
Galaxy S21 5G 128GB - Grey - Unlocked
Condition
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
Galaxy S21 5G 128GB - Grey - Unlocked
Condition
Excellent
Purchased
12/09/2026
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
Galaxy S21 5G 128GB - Purple - Unlocked
Condition
Excellent
Purchased
02/06/2026
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
Galaxy S21 5G 128GB - Grey - Unlocked
Condition
Excellent
Purchased
13/04/2026
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
Galaxy S21 5G 128GB - Grey - Unlocked
Condition
Fair
Purchased
24/05/2026
Popular searches
Everything you ever wanted to know about the Galaxy S21 5G
Durability
Overall performance
Camera
Screen quality
Galaxy S21 5GModel
Samsung Galaxy SSerie
SM-G991BManufacturer Ref
169 gWeight
SamsungBrand
AndroidOS
Phantom GrayColour (official name)
1080 x 2400Resolution
1.51SAR body part
The Samsung Galaxy S21 5G is a flagship smartphone that combines cutting-edge technology with a sleek design. Launched in January 2021, this model remains a strong contender in the market, offering a powerful performance 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 rear cameras with 12MP ultra-wide, 12MP wide, and 64MP telephoto lenses
- Connectivity: 5G compatible ensuring ultra-fast downloads and low-latency performance.
The Samsung Galaxy S21 5G is ideal for users who want a high-performing smartphone with excellent photography capabilities. It's well-suited for professionals, content creators, and anyone who enjoys streaming media on a vibrant display.
Pros & Cons:| Pros | Cons |
|---|---|
| Stunning display with vibrant colours and high refresh rate. | No expandable storage option available. |
| Versatile camera system for various photography styles. | Plastic back may not appeal to all users. |
Why refurbished?
Choosing a refurbished Samsung Galaxy S21 5G allows you to enjoy premium features while being eco-conscious. Back Market ensures each device undergoes thorough testing and meets high-quality standards. Learn more about our quality standards.
- Model
- Galaxy S21 5G
- Serie
- Samsung Galaxy S
- Manufacturer Ref
- SM-G991B
- Weight
- 169 g
- Brand
- Samsung
- OS
- Android
- Colour (official name)
- Phantom Gray
- Resolution
- 1080 x 2400
- SAR body part
- 1.51
- Carrier compatibility
- Unlocked
- Year of Release
- 2021
- SIM card
- Physical SIM + eSIM
- Storage
- 256 GB
- Memory (GB)
- 8 GB
- Compatible with latest Update
- Yes
- Screen type
- Dynamic AMOLED 2X
- Colour
- Grey
- Screen size (in)
- 6.2
- Foldable
- No
- Front camera
- 10 megapixels
- Main camera
- 12 megapixels
- Mobile network
- 5G
- SAR head
- 0.46
- SD Card Slot
- No
Galaxy S21 5G
Related articles
NewsNew vs. Refurbished: The Environmental Impact of the Tech Industry | Back Market
SamsungBest Galaxy smartphones: From deluxe to budget | Back Market
Samsung TabHow to reset a Samsung tablet: Easy Guide | Back Market
- Samsung
How to factory reset a Samsung phone | Back Market
SamsungSamsung Galaxy S25 series review: Is it worth it? | Back Market
Black Friday buying guidesPlayStation 5 Black Friday Deals 2026 - 'Deals of the Year' sale | Back Market
Black Friday buying guidesXbox Black Friday 2026 Deals - 'Deals of the Year' sale | Back Market
Welcome to Back Market
The best prices for high-quality renewed goods by sellers 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 items
- Free 30-day returns
- Excellent customer support
product-page-e2e-translation-check-en-gb