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Galaxy S21 5G 128GB - White - Unlocked

£168.48
before trade-in
Save £930.52


Free delivery by 20 May - 21 May
Express delivery by 19 May-20 May from £5.00

All devices are restored professionally based on a 25-point inspection

  • Buttons
  • SIM and/or memory card reader
  • Data deletion
  • Chargers and/or cables
  • Unlocking
  • GPS and/or positioning system
  • Cameras
  • External sensors
  • Biometric sensors
  • WiFi and Bluetooth
  • IMEI serial number
  • Oxidation
  • Flash and indicator lights
  • Mics and speakers
  • Input and output ports
  • Phone carrier
  • Battery health
  • Mechanical parts
  • Parts compatibility
  • Screen
  • Other features specific to this device

Ta-da!

Galaxy S21 5G 128GB - White - Unlocked
Galaxy S21 5G
GoodStandard battery128 GBDual Physical SIM + eSIMWhite
£168.48
before trade-in
Save £930.52

Proudly refurbished by 4gadgets (United Kingdom)

Free delivery by 20 May - 21 May
Express delivery by 19 May-20 May from £5.00

Comes with

Compatible charging cable

Galaxy S21 5G 128GB - White - Unlocked: customer reviews

11,019 verified reviews in the last 24 months.

  • A

    Amy W.

    Purchased on the 12 September 2024

    Verified purchase

    I've used Back market for tech over the last 2-3 years now and have always found it to be great. Good choice of products, wide variety of condition and price, something for every budget. Quick service, reliable, even when there's a problem its dealt with quickly and efficiently. I have been highly recommending you to all my and friends. Buying reconditioned products is good for the environment and that's really important to me. 5 star products with great customer service and good for the planet.

    Reviewed in United Kingdom on 12 April 2025

  • W

    William T.

    Purchased on the 4 November 2024

    Verified purchase

    Good range of choice, well described quality of refurbished products and tast delivery.... tge new phone was up abd running way quicker than a) I expected or b) my network supplier would have managed 👍🏻😁

    Reviewed in United Kingdom on 21 April 2025

  • J

    Jane A.

    Purchased on the 13 September 2024

    Verified purchase

    Thankyou BackMarket you made my purchase thr best decision i have made when it come to choosing my phone. The phone arrived quickly even though it was a refurbished one it looked brand new, the phone was i pristine condition and works perfictly, I would definatly recommend to anyone.

    Reviewed in United Kingdom on 16 May 2025

  • B

    Beryl M.

    Purchased on the 30 October 2024

    Verified purchase

    I treated mysel to a new phone last year for my birthday and After a couple of weeks I hated it, it was like a brick but stuck it out as long as I could till I couldn't stand it any more so decided to treat myself again this year. After being a little dubious about refurbished phones, I did some research and decided to go with Back market and so pleased I did its a S21 wasn't sure what rate to go for and settled on good I thought I can live with a few scratches witch hopefully wouldn't show under a case. Wow what a surprise it came within 48 hrs and is immaculate looks brand new. I absolutely love it thank you back market I've recommended you already and will be back 😀 I don't know about 5* I give you 10 🥰

    Reviewed in United Kingdom on 5 May 2025

  • S

    Sarah W.

    Purchased on the 7 December 2024

    Verified purchase

    Bought my first refurbished phone as a gift and got to say it probably won't be my last purchase. The phone was rated as good condition, but I would say it was more in excellent condition. Other than not having the original box the phone was in near pristine, I say near because there was one tiny and I mean tiny imperfection on the casing, but don't let this put you off as I had to look hard to find it!! Well worth the money on looks alone. I can't comment on the functionality because as I say it is a gift so I won't know about that till after Christmas :).

    Reviewed in United Kingdom on 12 May 2025

  • R

    Richard N.

    Purchased on the 6 April 2024

    Verified purchase

    Well I must say I was a little dubious ordering a refurbished phone but honestly I'm more than happy with it. You wouldn't know it was refurbished at all. I went for the excellent condition samsung s21 and it's perfect and £95 cheaper than anywhere else offering the same phone.

    Reviewed in United Kingdom on 23 April 2025

  • H

    Howard S.

    Purchased on the 10 April 2024

    Verified purchase

    Arrived quickly. Condition (pristine) was accurate - no marks or scratches. Set-up was fine just like a new phone (fairly easy with Samsung Smart Switch). Battery condition is good - retains charge well. A bargain compared to a new phone - and I prefer to use refurbished equipment as long as the condition, price and technology meet my needs. Full marks (so far).

    Reviewed in United Kingdom on 22 April 2025

See all 11,019 reviews

Reborn vs. brand new

Here’s what you help prevent on average by choosing a reborn smartphone over a brand new one.

77.3 kg of carbon

That’s like driving an old banger from London to Edinburgh and back.

6.3 oz of e-waste

That’s around the weight of a baseball.

537.1 lbs of raw materials

That's like 20 dogs digging in your yard for a week.

77,000 litres of water

That's like running a faucet for 3 days

Everything you ever wanted to know about the Galaxy S21 5G 128GB - White - Unlocked


  • Durability

  • Overall performance

  • Camera

  • Screen quality

  • WhiteColour

  • 128 GBStorage

  • 8 GBMemory

  • Galaxy S21 5GModel

  • AndroidOS

  • NoRetro tech

  • Dynamic AMOLED 2XScreen type

  • 10 megapixelsFront camera

  • Samsung ElectronicsCompany name

The Samsung Galaxy S21 5G is a versatile smartphone that combines cutting-edge technology with a sleek design. Released in January 2021, it remains a strong contender in the market, offering impressive features for everyday use.

Key features:
  • 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
  • Connectivity: 5G compatible for ultra-fast browsing and streaming
  • Operating System: Ships with Android 11, upgradable to newer versions
Who is this for?

The Galaxy S21 5G is ideal for users who need a powerful device for multitasking, photography, and media consumption. It’s suitable for professionals, students, and anyone who values a high-quality display and reliable performance in a smartphone.

Pros & Cons:
Pros Cons
Stunning display with vibrant colours and high brightness. No expandable storage option.
Excellent camera performance for photography enthusiasts. Plastic back instead of glass, which may not appeal to some users.

Why refurbished?

Choosing a refurbished Samsung Galaxy S21 5G allows you to enjoy a premium smartphone experience while being environmentally conscious. Each device is thoroughly inspected and tested to meet quality standards set by Back Market. Learn more about our quality standards.

Galaxy S21 5G 128GB - White - Unlocked
ColourWhite
Storage128 GB
Memory8 GB
ModelGalaxy S21 5G
OSAndroid
Retro techNo
Screen typeDynamic AMOLED 2X
Front camera10 megapixels
Company nameSamsung Electronics
SeriesSamsung Galaxy S
Company email addresssupport@samsung.com
Company postal addressSamsung House, 1000 Hillswood Drive, Chertsey, Surrey, KT16 0PS, UK
SIM cardDual Physical SIM + eSIM
Main camera12 megapixels
Colour (official name)Phantom white
SD Card SlotNo
FoldableNo
Compatible with latest UpdateYes
Manufacturer RefSM-G991B/DS
Network5G
Resolution1080 x 2400
SAR body1,509
SAR head0,456
Screen size (in)6.2
Carrier compatibilityUnlocked
Year of Release2021
BrandSamsung
Weight169 g
Height15,17 cm
Width7,12 cm
Depth0,79 cm
  • 1-year minimum warranty
  • Free delivery on all items
  • Free 30-day returns
  • Excellent customer support