Darn, it's out of stock
(for now)
Galaxy S21 Ultra 5G 256GB - Dark Blue - Unlocked

Galaxy S21 Ultra 5G 256GB - Dark Blue - Unlocked

is currently unavailable.

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

  • Buttons
  • SIM/memory card reader
  • Data deletion
  • Chargers/cables
  • Unlocked by previous owner
  • GPS/positioning system
  • Cameras
  • External sensors
  • Biometric sensors
  • Wi-Fi and Bluetooth
  • IMEI serial number
  • Water damage
  • 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

Customer reviews for Galaxy S21 Ultra 5G 256GB - Dark Blue - Unlocked

3,681 verified reviews in the last 24 months.

  • C

    Corey O.

    Purchased on the 14 November 2023

    Verified purchase

    I ordered a silver 128gb S21 Ultra off this site, I got it in fair condition expecting maybe a couple of scratches or dents. the phone was in absolutely FLAWLESS condition, I had to look for anything off, nothing. best refurbished device I ever bought. I recommend Backmarket and the reseller ReMarket 100%! fast delivery and great service!

    Reviewed in Ireland on 17 November 2023

  • T

    Theresa M.

    Purchased on the 21 December 2024

    Verified purchase

    Great service.. quick delivery.. ONLY gripe if I had one was that we can't use Klarna on the page, which would have made additional purchases simpler. We had to use refurbed as they do offer that service and as a household of twelve we buy a LOT of phones so would make good business sense to adopt it

    Reviewed in Ireland on 5 January 2025

  • J

    John D.

    Purchased on the 24 November 2024

    Verified purchase

    great phone, like new. the only problem I have us when I was ordering I looked up the specs and it said it was a G988b, which is the European version firmware. I wanted this because I had already bought the same phone from refurbed.ie and they sent me a G988u1 phone, the problem was it's on US Firmware and I could not get it to update to latest firmware. they took it back and promised me a replacement but never followed through. this phone even though it's set to USA region firmware has updated ok, but only downside it's only got American English version. I think you should only sell phones that have regional based firmware to the same firmeare region. for example I should have received a Gʻ988B phone.

    Reviewed in Ireland on 12 December 2024

  • C

    Christian O.

    Purchased on the 24 November 2023

    Verified purchase

    Before buying, I had spent quite a bit of time researching the phone followed by lots of shopping round for the best prices. Coming up to and including on the day of Black Friday, prices seemed to fluctuate wildly, both up and down but in the end, I got the best price here. Ordering was reasonably easy although it did take two goes to actually pay for it. Delivery was several days later than was predicted but in my case that was not a major issue. Phone was, as advertised, in excellent condition. Transfer from my old Samsung was for the most part easy and automatic although did have trouble with WhatsApp. Battery life is disappointing with no more than 24 hours medium use but that seems to be the way and I doubt a brand new phone would be much better. Overall happy experience.

    Reviewed in Ireland on 20 December 2023

  • M

    Mantas K.

    Purchased on the 12 March 2024

    Verified purchase

    I purchased the Galaxy S21 Ultra 512GB model in good condition and it did arrive in good condition indeed. Screen - mint condition. I'm very happy, only thing is I had to get a fast charger for it. Also, battery is somewhat average but in fairness I didn't expect it to be much better anyway (lasts about a day with medium usage). Shopping experience was absolutely fantastic 👌 💯 I would highly recommend this company to anyone.

    Reviewed in Ireland on 24 March 2024

  • P

    Pedro D.

    Purchased on the 11 November 2023

    Verified purchase

    The delivery was extremely fast, it arrived at my address in 2 days... the quality of the phone is also great, practically perfect, the battery is not in such good condition but that's what you would expect from a used phone, apart from all that it's a 10

    Reviewed in Ireland on 26 November 2023

  • H

    Haitam K.

    Purchased on the 14 March 2025

    Verified purchase

    My S21 ULTRA is doing great and matches the description. Thank you back market for your honesty and your service

    Reviewed in Ireland on 30 March 2025

See all 3,681 reviews

Renewed vs. brand new

Here’s what you help prevent on average by choosing a renewed 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 Ultra 5G 256GB - Dark Blue - Unlocked

  • Dark BlueColour

  • 256 GBStorage

  • 12 GBMemory

  • Galaxy S21 Ultra 5GModel

  • AndroidOS

  • NoRetro tech

  • Dynamic AMOLED 2XScreen type

  • USB-CConnector

  • 40 megapixelsFront camera

The Galaxy S21 Ultra 5G is a flagship smartphone that continues to impress with its advanced features and performance. Launched in January 2021, it remains a top choice for users seeking a powerful device with exceptional camera capabilities and a stunning display.

Key features:
  • Release Date: January 2021
  • Display: 6.8-inch Dynamic AMOLED 2X, QHD+ resolution
  • Processor: Exynos 2100 (international) or Snapdragon 888 (USA)
  • Camera: Quad-camera system with 108MP main sensor, 12MP ultra-wide, and two 10MP telephoto lenses
  • Connectivity: 5G compatible for ultra-fast downloads and low-latency performance.
Who is this for?

The Galaxy S21 Ultra 5G is ideal for photography enthusiasts, gamers, and power users who demand high performance and versatility from their smartphones. It’s particularly well-suited for professionals who need a device that can handle multitasking and content creation with ease.

Pros & Cons: Pros Cons Outstanding camera quality with versatile shooting options. Large and heavy design may not be comfortable for all users. Vibrant and immersive display with 120Hz refresh rate. Premium price point compared to other models.
Why refurbished?

Choosing a refurbished Galaxy S21 Ultra 5G allows you to experience flagship features while being environmentally conscious. Back Market ensures each device is thoroughly tested and restored to excellent condition, providing you with a reliable smartphone. Learn more about our quality standards.

Galaxy S21 Ultra 5G 256GB - Dark Blue - Unlocked
ColourDark Blue
Storage256 GB
Memory12 GB
ModelGalaxy S21 Ultra 5G
OSAndroid
Retro techNo
Screen typeDynamic AMOLED 2X
ConnectorUSB-C
Front camera40 megapixels
Company nameSamsung Electronics
Camera TypeQuadruple (4x)
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 camera108 megapixels
Color (official name)Phantom Navy
SD Card SlotNo
FoldableNo
Compatible with latest UpdateYes
Manufacturer RefSM-G998B/DS
Network5G
Resolution1440 x 3200
SAR body1.58
SAR head0.71
Screen size (in)6.8
Carrier compatibilityUnlocked
Year of Release2021
BrandSamsung
Weight227 g

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