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Galaxy S21 Ultra 5G 512GB - Silver - Unlocked - Dual-SIM

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Galaxy S21 Ultra 5G's customer reviews

4.3/5

1,107 verified reviews in the last 6 months.

  • C

    Corey O.

    Reviewed in Ireland on 17 November 2023

    4.8/5
    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!
    Galaxy S21 Ultra 5G 128GB - Silver - Unlocked - Dual-SIM

    Purchased on the 14 November 2023

  • C

    Christian O.

    Reviewed in Ireland on 20 December 2023

    4/5
    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.
    Galaxy S21 Ultra 5G 256GB - Black - Unlocked - Dual-SIM

    Purchased on the 24 November 2023

  • M

    Mantas K.

    Reviewed in Ireland on 24 March 2024

    4.5/5
    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.
    Galaxy S21 Ultra 5G 512GB - Silver - Unlocked - Dual-SIM

    Purchased on the 12 March 2024

  • B

    Beauty ezinne J.

    Reviewed in Ireland on 29 October 2023

    4.9/5
    The phone arrived on time and it's worth the price. It had just few scratches (because I selected the fair quality) which won't be visible when in a phone pouch. Overall, I'm satisfied and glad to save money while living sustainably.
    Galaxy S21 Ultra 5G 512GB - Black - Unlocked - Dual-SIM

    Purchased on the 10 October 2023

  • P

    Pedro D.

    Reviewed in Ireland on 26 November 2023

    4.1/5
    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
    Galaxy S21 Ultra 5G 128GB - Black - Unlocked - Dual-SIM

    Purchased on the 11 November 2023

  • L

    Liam M.

    Reviewed in Ireland on 25 March 2024

    4.8/5
    Hey quick service and good quality phone received. Recommended
    Galaxy S21 Ultra 5G 256GB - Silver - Unlocked - Dual-SIM

    Purchased on the 4 March 2024

  • E

    Emma B.

    Reviewed in Ireland on 28 February 2024

    5/5
    Phone works perfectly and came in fantastic condition, and so quickly!
    Galaxy S21 Ultra 5G 256GB - Black - Unlocked - Dual-SIM

    Purchased on the 25 February 2024

See all 1,107 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

Samsung Galaxy S21 Ultra 5G 512 GB - Silver - Unlocked


Our partners are electronics experts who test and verify that each product is 100% functional before it leaves the factory. This is the reason you benefit from a minimum 1-year warranty with the purchase of a refurbished device at Back Market.

Galaxy S21 Ultra 5G 512GB - Silver - Unlocked - Dual-SIM

  • Colour : Silver
  • SIM card : Unlocked
  • Screen size (in) : 6.8
  • Storage : 512 GB
  • Memory : 16 GB
  • Model : Galaxy S21 Ultra 5G
  • Megapixels : 12
  • OS : Android
  • Resolution : 1440x3200
  • Network : 5G
  • SD Card Slot : No
  • Double SIM : Yes
  • Manufacturer Ref : SM-G998B/DS
  • Year of Release : 2021
  • Series : Samsung Galaxy S
  • Foldable : No
  • SAR head (W/kg) : 0,714
  • SAR body (W/kg) : 1,58
  • SAR body part (W/kg) : 2,56
  • SIM card : Dual-SIM + eSIM
  • Color (official name) : Phantom silver
  • Product type : Refurbished
  • Brand : Samsung
  • Weight : 227 g
  • Height : 16,15 cm
  • Width : 7,56 cm
  • Depth : 0,89 cm

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