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Galaxy S23 Ultra 512GB - Black - Unlocked

£427.68
before trade-in
Save £1,171.32


Free delivery by 25 Apr - 28 Apr
Express delivery by 24 Apr-25 Apr 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 S23 Ultra 512GB - Black - Unlocked
Galaxy S23 Ultra
FairStandard battery512 GBDual Physical SIM + eSIMBlack
£427.68
before trade-in
Save £1,171.32

Proudly refurbished by 4gadgets (United Kingdom)

Free delivery by 25 Apr - 28 Apr
Express delivery by 24 Apr-25 Apr from £5.00

Comes with

Compatible charging cable

Galaxy S23 Ultra 512GB - Black - Unlocked: customer reviews

4.5/5

2,252 verified reviews in the last 24 months.

  • D

    Dimitar K.

    Purchased on the 11 April 2025

    Verified purchase
    5/5

    I recently purchased a Samsung Galaxy S23 Ultra from Back Market and wanted to share my experience. As someone looking for a high-end smartphone without paying full retail price, Back Market offered exactly what I needed. The ordering process was straightforward and user-friendly. The product listings clearly showed the condition of the device, included accessories, and warranty information. I appreciated the detailed grading system that helped me understand exactly what to expect from my "refurbished" purchase. My Samsung Galaxy S23 Ultra arrived well-packaged and in the condition described on the website. The phone functions perfectly - the powerful Snapdragon processor handles everything I throw at it, and the camera system (especially that 200MP main sensor) takes incredible photos. Battery life has been excellent, and the screen is flawless with no signs of previous use. What really stands out about Back Market is their commitment to sustainable tech. Knowing my purchase extended the life of a premium device while reducing electronic waste made me feel good about my decision. Their customer service was responsive when I had a question about delivery timing. The 12-month ...

    Reviewed in United Kingdom on 21 April 2025

  • J

    James H.

    Purchased on the 10 April 2025

    Verified purchase
    4.9/5

    I can't justify spending over a thousand pound on a phone so I decided to buy a refurbished galaxy s23 ultra, I paid extra for an immaculate screen but left the body as gently used. In all it cost me £415 and I must say the phone looks as if it's hardly ever been used, the screen is perfect and the body is also in perfect condition,not to mention the fast delivery. I will be ordering 1 again for the wife for her birthday.

    Reviewed in United Kingdom on 20 April 2025

  • T

    Tanya P.

    Purchased on the 24 November 2024

    Verified purchase
    5/5

    I ordered a 'good' condition Samsung S23 ultra Sunday afternoon. Paid a little for faster despatch and received Tuesday morning. I am so pleased. Only marks I can see to suggest it is a refurbishment is a little scratch near the charging port. Thank you so much 👌

    Reviewed in United Kingdom on 27 March 2025

  • L

    Lois S.

    Purchased on the 12 March 2025

    Verified purchase
    5/5

    This is the first time buying a refurbished phone so I was a little worried. I brought a phone in 'good' condition and have to say I'm so impressed. It's in near perfect condition and is working as if it was brand new. I paid extra for the faster delivery and it was delivered the next day. Will definitely be using this company again.

    Reviewed in United Kingdom on 26 March 2025

  • L

    Lan B.

    Purchased on the 15 February 2025

    Verified purchase
    5/5

    Exactly as described at a fair price. Perfect for my teen son who wanted a decent phone model but wasn’t fussy about new/refurbished. Very pleased with the product and service and would buy from Backmarket again.

    Reviewed in United Kingdom on 26 March 2025

  • H

    Henry B.

    Purchased on the 13 February 2025

    Verified purchase
    5/5

    First time, taking a 'punt' at a refurbished phone purchase & was not disappointed. Outstanding, fast (less than 48 hours) service from initial order to receiving my S23 Ultra (advertised as in excellent condition) & of which was in 'mint condition' at a price that is a fraction of the current retail price. No nonsense customer service between both Back Market & delivery company was fantastic; notified / kept informed of said delivery every step of the way. I highly recommend (it's a no brainer), if you are hesitant of a refurb purchase - this is one customer that will defo be opting for the refurbished purchase option in the future (Back Market is the place to shop!)

    Reviewed in United Kingdom on 26 March 2025

  • B

    Ben D.

    Purchased on the 26 October 2024

    Verified purchase
    4.5/5

    I ordered a good grade phone so expected it to have some blemishes on the back and sides which it did. As the phone will always be in a case this is not an issue. However the good description states that the screen should be flawless but unfortunately there are a couple of feint scratches. Once I'd applied a screen protector these can't be seen so not serious enough to warrant returning the phone. So, overall I'm very happy with my refurbished S23 Ultra which was significantly less than half the price of buying one new. The order process is straightforward and phone was delivered on time so would definitely recommend Back Market for buying quality refurbished tech.

    Reviewed in United Kingdom on 11 April 2025

See all 2,252 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 S23 Ultra 512GB - Black - Unlocked


  • Durability

  • Overall performance

  • Camera

  • Screen quality

  • BlackColour

  • 512 GBStorage

  • 12 GBMemory

  • Galaxy S23 UltraModel

  • AndroidOS

  • NoRetro tech

  • Dynamic AMOLED 2XScreen type

  • USB-CConnector

  • 12 megapixelsFront camera

Galaxy S23 ULTRA 512 GB (Dual Sim) - Black - Unlocked

Galaxy S23 Ultra 512GB - Black - Unlocked
ColourBlack
Storage512 GB
Memory12 GB
ModelGalaxy S23 Ultra
OSAndroid
Retro techNo
Screen typeDynamic AMOLED 2X
ConnectorUSB-C
Front camera12 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 camera200 megapixels
Colour (official name)Phantom Black
SD Card SlotNo
FoldableNo
Compatible with latest UpdateYes
Network5G
Resolution1440 x 3088
SAR body1.398
SAR body part2.95
SAR head0.963
Screen size (in)6.8
Carrier compatibilityUnlocked
Year of Release2023
BrandSamsung
Weight233 g
Height16,3 cm
Width0,9 cm
Depth8,9 cm
  • 1-year minimum warranty
  • Free delivery on all items
  • Free 30-day returns
  • Excellent customer support