• Pay with Klarna.
  • Free 30-day returns
  • Free delivery on all items
  • 1-year minimum warranty

Refurbished Samsung Galaxy S21 Ultra 5G

Buy the Samsung Galaxy S21 Ultra 5G refurbished from Back Market and get it up to 60% cheaper than the retail price. Browse our cheap Samsung S21 deals and enjoy a long battery life, four high-resolution cameras and a 120hz Super AMOLED display.
26 products
-76%
less than new
Galaxy S21 Ultra 5G 256GB - Black - Unlocked

Galaxy S21 Ultra 5G

256 GB - Black - Unlocked

Warranty: 12 months
4.3/5
(1490)
Starting at
£231.00 £999.00 new

Staff pick

Our latest and most favourite offer.

Best Seller
Galaxy S21 Ultra 5G 128GB - Black - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

128 GB - Black - Unlocked Warranty: 12 months
4.3/5
(1493)
Starting at:
£219.72 £1,149.00 new
Best Seller
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

128 GB - Silver - Unlocked Warranty: 12 months
4.3/5
(1064)
Starting at:
£233.58 £1,800.00 new
Best Seller
Galaxy S21 Ultra 5G 512GB - Black - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

512 GB - Black - Unlocked Warranty: 12 months
4.3/5
(1064)
Starting at:
£259.24 £1,439.00 new
Galaxy S21 Ultra 5G 128GB - Black - Unlocked

Galaxy S21 Ultra 5G

128 GB - Black - Unlocked Warranty: 12 months
4.3/5
(1064)
Starting at:
£231.75 £1,316.00 new
Galaxy S21 Ultra 5G 256GB - Black - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

256 GB - Black - Unlocked Warranty: 12 months
4.3/5
(1064)
Starting at:
£280.84 £1,250.00 new
Galaxy S21 Ultra 5G 256GB - Silver - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

256 GB - Silver - Unlocked Warranty: 12 months
4.3/5
(1064)
Starting at:
£257.42 £1,598.00 new
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked

Galaxy S21 Ultra 5G

128 GB - Silver - Unlocked Warranty: 12 months
4.3/5
(1063)
Starting at:
£278.00 £1,607.00 new
Galaxy S21 Ultra 5G 256GB - Dark Gray - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

256 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1059)
Starting at:
£322.00 £1,578.00 new
Galaxy S21 Ultra 5G 256GB - Dark Grey - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

256 GB - Dark grey - Unlocked Warranty: 12 months
4.3/5
(1063)
Starting at:
£294.00 £889.00 new
Galaxy S21 Ultra 5G 512GB - Silver - Unlocked

Galaxy S21 Ultra 5G

512 GB - Silver - Unlocked Warranty: 12 months
4.3/5
(1056)
Starting at:
£320.89 £1,533.00 new
Galaxy S21 Ultra 5G 256GB - Brown - Unlocked

Galaxy S21 Ultra 5G

256 GB - Brown - Unlocked Warranty: 12 months
4.3/5
(1065)
Starting at:
£348.00 £1,309.77 new
Galaxy S21 Ultra 5G 128GB - Dark Gray - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

128 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1056)
Starting at:
£293.00 £1,899.00 new
Galaxy S21 Ultra 5G 256GB - Silver - Unlocked

Galaxy S21 Ultra 5G

256 GB - Silver - Unlocked Warranty: 12 months
4.3/5
(1061)
Starting at:
£348.00 £1,647.00 new
Galaxy S21 Ultra 5G 512GB - Black - Unlocked

Galaxy S21 Ultra 5G

512 GB - Black - Unlocked Warranty: 12 months
4.3/5
(1066)
Starting at:
£370.00 £1,417.00 new
Galaxy S21 Ultra 5G 512GB - Dark Gray - Unlocked

Galaxy S21 Ultra 5G

512 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1114)
Starting at:
£373.00 £1,500.00 new
Galaxy S21 Ultra 5G 512GB - Silver - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

512 GB - Silver - Unlocked Warranty: 12 months
4.3/5
(1064)
Starting at:
£314.00 £1,800.00 new
Galaxy S21 Ultra 5G 128GB - Dark Grey - Unlocked

Galaxy S21 Ultra 5G

128 GB - Dark grey - Unlocked Warranty: 12 months
4.3/5
(1067)
Starting at:
£249.99 £950.00 new
Galaxy S21 Ultra 5G 128GB - Dark Gray - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

128 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1047)
Starting at:
£293.00 £1,500.00 new
Galaxy S21 Ultra 5G 128GB - Brown - Unlocked

Galaxy S21 Ultra 5G

128 GB - Brown - Unlocked Warranty: 12 months
4.3/5
(1063)
Starting at:
£293.00 £1,148.00 new
Galaxy S21 Ultra 5G 512GB - Dark Gray - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

512 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1055)
Starting at:
£311.16 £1,900.00 new
Galaxy S21 Ultra 5G 512GB - Dark Gray - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

512 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1056)
Starting at:
£388.00 £1,500.00 new
Galaxy S21 Ultra 5G 512GB - Dark Gray - Unlocked

Galaxy S21 Ultra 5G

512 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1059)
Starting at:
£388.00 £1,000.00 new
Galaxy S21 Ultra 5G 512GB - Brown - Unlocked

Galaxy S21 Ultra 5G

512 GB - Brown - Unlocked Warranty: 12 months
4.3/5
(1061)
Starting at:
£408.00 £1,309.77 new
Galaxy S21 Ultra 5G 256GB - Dark Gray - Unlocked

Galaxy S21 Ultra 5G

256 GB - Dark Gray - Unlocked Warranty: 12 months
4.3/5
(1122)
Starting at:
£418.00 £1,329.63 new
Galaxy S21 Ultra 5G 256GB - Brown - Unlocked - Dual-SIM

Galaxy S21 Ultra 5G

256 GB - Brown - Unlocked Warranty: 12 months
4.3/5
(1063)
Starting at:
£679.00 £1,309.77 new
Trade-in

Verified customer reviews for Refurbished Samsung Galaxy S21 Ultra 5G

4.4/5

326 verified reviews in the last 6 months.

4-5 stars
80%
3-4 stars
13%
2-3 stars
5%
1-2 stars
2%
I

Ireneusz B.

5/5

Reviewed in United Kingdom on 4 November 2023

I recently purchased a refurbished Samsung Galaxy S21 Ultra in excellent condition from backmarket.co.uk, and I couldn't be happier with my decision. The device looks and functions like brand new, and I got it at a fraction of the original price. The service was exceptional, with fast shipping. I highly recommend buying refurbished electronics from this site, and my Samsung S21 Ultra is a testament to the quality and value they provide. It's been a fantastic experience, and I'm thrilled with my purchase!
Galaxy S21 Ultra 5G

Overall performance

Appearance

Accessories

Battery

Lens & Camera

Packaging

Shipping

 

Purchased on the 20 October 2023

J

John O.

5/5

Reviewed in United Kingdom on 20 November 2023

I really love the phone and everyone attested to the fact that if i hadn't mentioned its refurbished, they wouldn't have know due to it excellent outlook, affordability and payment structure. Back market has won my heart!
Galaxy S21 Ultra 5G

Overall performance

Appearance

Accessories

Battery

Lens & Camera

Packaging

Shipping

 

Purchased on the 8 November 2023

K

Karen R.

5/5

Reviewed in United Kingdom on 13 December 2023

Phone was delivered in impeccable condition, honestly looked brand new! So pleases I discovered Back Market and saved myself so much money without compromising on quality. Highly recommend to anyone who's wanting to buy a new phone as you would never tell the difference that you're getting a refurbished phone.
Galaxy S21 Ultra 5G

Overall performance

Appearance

Accessories

Battery

Lens & Camera

Packaging

Shipping

 

Purchased on the 24 November 2023

E

Ellen D.

4.6/5

Reviewed in United Kingdom on 17 April 2024

I bought this phone for a better battery, there isn't much difference to my previous phone s20. However, everything else works perfectly. Really happy with my purchase, you couldn't tell it was a refurbished phone. Thanks Back Market 😁
Galaxy S21 Ultra 5G

Overall performance

Appearance

Accessories

Battery

Lens & Camera

Packaging

Shipping

 

Purchased on the 28 March 2024

J

Joel L.

4.2/5

Reviewed in United Kingdom on 11 December 2023

Phone arrived with the bottom corners scratched, the screen itself was mildly scratched as well which is to be expected from a refurbished phone. Functionally, the phone works as expected, however battery life is abysmal. I was hoping the phone would've arrived with a better battery condition.
Galaxy S21 Ultra 5G

Overall performance

Appearance

Accessories

Battery

Lens & Camera

Packaging

Shipping

 

Purchased on the 24 November 2023

See all reviews

Popular searches -  our most popular searches