- Galaxy S21 5G
Refurbished Samsung Galaxy S21 5G
Buy a refurbished Samsung Galaxy S21 SIM-free with 85%+ battery health, 12-month warranty, 45-day returns and fast UK delivery.
Overview
Buy a Refurbished Samsung Galaxy S21 SIM-Free
There's something refreshing about a phone that doesn't try to be everything to everyone. The S21 just gets on with it. It’s fast, responsive and capable in all the ways that matter most day to day. Great camera, great display, great build. No unnecessary complexity, no features you'll never use. Just a well made Samsung smartphone that does its job beautifully.
In a world that constantly tells you to upgrade, the S21 makes the case for enough. And enough, here, is really rather good.
Every refurbished S21 we sell at The Big Phone Store is tested and graded in-house — data-wiped, battery checked, unlocked and covered by a 12-month warranty. Uncomplicated. Underpriced. Underrated.
What you get, at a glance
Network: SIM-free and unlocked for compatible UK networks
Testing: 90+ point quality check before dispatch
Battery health: Minimum 85% as standard
Like New battery: 100% guaranteed battery health
Warranty: 12 months included
Returns: 45-day returns process
Delivery: Free UK delivery over £30, free fast delivery over £150
Preparation: Tested, graded, data-wiped and dispatched in-house
Direct answer: Is a reconditioned Samsung Galaxy S21 worth it?
Yes. A reconditioned Samsung Galaxy S21 is worth it if you want a compact Samsung flagship with 5G, a bright AMOLED display, strong cameras and a much lower price than newer models. It is a smart choice for buyers who want value over the latest label. Testing, battery checks, warranty and returns make it safer than buying used privately.
Why Buy from The Big Phone Store?
Buying an older flagship can be a very smart move. You avoid the high price of a new phone, keep quality tech in use for longer and still get the protection of a proper retailer. The Big Phone Store has specialised in refurbished, recycled and reused electronics since 1999.
Experience: Refurbishing electronics since 1999 - You buy from a long-standing specialist
Trust: 4.8 Trustpilot rating with 80,000+ reviews - You can see proof from real UK shoppers
Security: Data-wiped and history checked, including CheckMEND where relevant - Lower risk than a private sale
Quality: 90+ point quality check - Core features are tested before dispatch
Support: UK-based customer support - Help is available if you need it
Sustainability: WEEE-certified recycler - Your upgrade helps reduce electronic waste
Stock: Website stock means it is actually in stock - No false availability
Device quality: OEM-quality parts or higher where parts are used - Repairs are handled to a proper standard
Key Features That Matter Day to Day
6.2-inch Dynamic AMOLED 2X display: Bright, sharp and compact enough for easy everyday use.
120Hz refresh rate: Makes scrolling, browsing and switching apps feel smoother.
Exynos 2100 processor: Strong enough for social media, banking, maps, streaming, photos and daily multitasking.
8GB RAM: Keeps normal app switching responsive.
Triple rear camera system: Wide, ultra-wide and telephoto-style shooting give you more photo options.
3x hybrid optical zoom: Useful for pets, events, travel and detail shots without moving closer.
4,000mAh battery: A sensible size for a compact flagship, with battery health checked before dispatch.
5G connectivity: Fast mobile data on compatible UK networks.
IP68 rating: Added dust and water resistance for everyday confidence.
Refurbished vs Used Samsung Galaxy S21
A refurbished Samsung Galaxy S21 is professionally prepared before sale. A typical used Samsung Galaxy S21 from a private seller may look cheaper, but it can come with unknown battery health, unclear history and no useful warranty.
Professionally Refurbished | Typical Used Phone |
90+ point testing before dispatch | May only be briefly checked |
Minimum 85% battery health | Battery health may be unknown |
Professionally data-wiped | Data removal may not be complete |
12-month warranty included | Usually no warranty |
Clear cosmetic grade | Condition can be unclear |
Network and history checks completed | Hidden finance or network risk may remain |
Direct answer: Is refurbished safer than buying used privately?
Yes. Refurbished is usually safer because the phone is tested, graded, data-wiped and sold with a warranty and returns process. A private used Samsung Galaxy S21 may seem like a saving, but you often lose battery checks, support, history checks and a clear route back if something goes wrong.
Condition Grades Explained
Every refurbished Samsung Galaxy S21 we sell is fully functional. The grade describes cosmetic condition, not performance.
Like New: Best for the cleanest look and 100% guaranteed battery health
Pristine: Best for excellent condition with very light signs of use
Very Good: Best for smart savings with minor cosmetic marks
Good: Best for the lowest price if visible wear does not bother you
“The Galaxy S21 is a smart buy for people who want flagship Samsung quality without paying flagship money.” - The Big Phone Store Refurbishment Team
Battery Health and Everyday Use
Every refurbished Samsung Galaxy S21 comes with at least 85% battery health as standard. This matters more on older models, because a private seller may not give you a reliable battery reading or any support after purchase.
Choose a Like New Samsung Galaxy S21 if you want 100% guaranteed battery health. This is the best option if you use your phone heavily for maps, photos, work calls, social media, streaming or long days away from a charger.
Direct answer: What battery health will I get?
You will get at least 85% battery health as standard. If you choose a Like New refurbished Samsung Galaxy S21, you get 100% guaranteed battery health. For older flagship models, Like New is the strongest choice if battery life matters most.
How We Test Each Device
A cheap Samsung Galaxy S21 usually reflects condition grade, storage, colour or a current offer, not weak functionality. Each device is checked before dispatch so you can save money without accepting private-seller uncertainty.
Testing includes:
Battery health and charging
Display and touchscreen
Fingerprint and face recognition
Rear and front cameras
Speakers and microphones
Buttons and haptics
Wi-Fi, Bluetooth and mobile signal
USB-C port, sensors and core functions
Three quality checks buyers rarely see anywhere else
Network and history checks: We complete checks, including CheckMEND where relevant, to reduce hidden-device risk.
Part-quality review: Where parts are used, we use OEM-quality parts or higher.
In-house control: Devices are tested, graded and dispatched by our own team, not passed through an unknown chain.
Technical Specifications
Specification | Samsung Galaxy S21 Detail | Benefit |
Display | 6.2-inch Dynamic AMOLED 2X | Compact, bright screen for daily use |
Resolution | 1080 x 2400 pixels | Clear detail for apps, photos and video |
Refresh rate | Up to 120Hz | Smooth scrolling and gaming |
Chip | Exynos 2100, UK model | Strong everyday flagship performance |
Storage | 128GB or 256GB | Options for apps, photos and downloads |
Rear camera | 12MP wide, 64MP telephoto, 12MP ultra-wide | Flexible photos without newer-model pricing |
Video | Up to 8K recording | High-detail video capture |
Front camera | 10MP | Clear selfies and video calls |
Battery | 4,000mAh | Built for everyday compact use |
Charging / port | USB-C, wired and wireless charging support | Modern charging options |
Connectivity | 5G, Wi-Fi 6, Bluetooth 5.0, NFC | Fast networks and easy payments |
What Comes in the Box?
Your order includes:
Refurbished Samsung Galaxy S21 handset
Charging cable
Sustainable packaging
SIM tool where applicable
A plug is only included if stated on the listing. This helps reduce unnecessary electronic waste and avoids sending chargers many buyers already own.
Reconditioned Samsung Galaxy S21 vs Samsung Galaxy S21 Plus
Feature | Samsung Galaxy S21 | Samsung Galaxy S21 Plus |
Display | 6.2-inch AMOLED | 6.7-inch AMOLED |
Battery | 4,000mAh | 4,800mAh |
Storage | 128GB or 256GB | 128GB or 256GB |
Camera | Triple rear camera | Triple rear camera |
Feel | Smaller and easier one-handed | Bigger and more immersive |
Best for | Low-cost S21 flagship entry | Bigger screen and stronger battery value |
Choose the refurbished Samsung Galaxy S21 if you want the cheapest, easiest entry into the S21 flagship range. Choose the Galaxy S21 Plus if you want a larger screen and bigger battery while still keeping costs below newer models.
Warranty, Delivery and Returns
Benefit | Detail |
Warranty | 12-month warranty as standard |
Warranty upgrades | Upgrade to 2 years, 5 years or lifetime where available |
Returns | 45-day returns process |
Standard delivery | Free UK delivery over £30 |
Fast delivery | Free fast delivery over £150 |
Support | UK-based support from real people |
Customer Reviews
We value the opinions of all of our customers, and we're sure that you do too! If you're still unsure about buying the Galaxy S21 5G you want, take a look at the reviews our customers have left for us.
4.9/5
Based on 15 customer
reviews
E
Erin
6 months ago
I bought a Samsung Galaxy S21 from The Big Phone Store and it's amazing! The screen protector they applied looks great and I’m happy with the battery upgrade. Delivery was quick too. My niece absolutely loved it when I showed her! Great value for everything I got. Would definitely recommend!
Value for money
Overall performance
Phone condition
Battery
Delivery speed
Recycled packaging
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Karen
10 months ago
Just got my Galaxy S21 and I love it! The phone is in excellent condition and looks brand new. It came with all the accessories fitted, like the screen protector. The service was smooth and fast. I'm really happy with my second phone after buying one for my partner. Definitely recommend!
Value for money
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Recycled packaging
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nick
11 months ago
I'm really happy with my new phone! It's in great condition and works perfectly. The battery lasts all day, which I love. Plus, the case is so sleek and fits like a glove. My friend recommended Big Phone Store and I see why. Great service from start to finish.
Value for money
Overall performance
Phone condition
Battery
Delivery speed
Recycled packaging
Frequently Asked Questions
Yes. It is SIM-free and unlocked for compatible UK networks, so you can use your current SIM or choose a SIM-only deal.
Yes. It is a strong value choice because you get 5G, an AMOLED display, smooth 120Hz scrolling and Samsung flagship features at a much lower refurbished price.
Yes. It has a triple rear camera system with wide, ultra-wide and zoom options, making it strong for everyday photos, travel, portraits and video.
It depends on what you need. The S21 is cheaper and easier to hold. The S21 Plus gives you a bigger 6.7-inch screen and larger 4,800mAh battery.
Yes. Older refurbished flagships can offer excellent value because they still have useful premium hardware, while costing much less than newer models. Reusing a phone also helps reduce e-waste.
Second hand usually means previously owned. Refurbished means the device has been tested, graded, cleaned, data-wiped and sold with warranty support.
Yes. Lower prices usually reflect grade, storage, colour or current offers. Functionality is still checked before dispatch.
Delivery depends on the option chosen at checkout. Free UK delivery is available over £30, with free fast delivery over £150.