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Galaxy S21 5G • Unlocked
  • +1 more colors

Refurbished Samsung Galaxy S21 5G

(1,980 reviews)
Starting at
$152.24before trade-in
$1,000.00 newSave $847.76
See options

Back Market score

Durability 74%

Overall performance 80%

Camera 54%

Screen quality 85%

  • 1-year warranty
  • Free standard shipping
  • Free 30-day returns
  • Friendly customer service

All Galaxy S21 options

Warranty: 12 months

26 products
US - Earth month
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iPhone vs. Galaxy | Back Market

Explore the differences between Apple iPhone and Samsung Galaxy smartphones to help you decide which one is right for you at Back Market.

Refurbished Samsung Galaxy S21 5G's customer reviews

2,253 verified reviews in the last 24 months.

  • H

    Heriberto D.

    Purchased on January 18, 2025

    Verified purchase

    I got it a day earlier ! And it was a little scratched from the top but it’s so worthy buying especially since I got it in a (fair) condition the screen and everything else was ok and worked perfectly fine really recommend and will be buying again thank you !!!

    Reviewed in the United States on January 22, 2025

    Galaxy S21 5G 128GB - Gray - Unlocked
  • E

    Evelyn B.

    Purchased on March 29, 2025

    Verified purchase

    The S21 is great. I had no problem transferring inforamtion form old phone. It moves much aster than my old phone. I love texting on it. I hae not figure the incoming call and call waiting yet but I am sure it will be not problem. Excellent phone even though it is refurbished. I will buy other things fro Back Market.

    Reviewed in the United States on April 16, 2025

    Galaxy S21 5G 128GB - Gray - Unlocked
  • F

    Franchesca I.

    Purchased on March 24, 2025

    Verified purchase

    This is the 3rd time I've purchased a refurbished phone from backmarket. I am absolutely a loyal customer and fan now so much so that I have recommended this site to everyone I know who's in the market for a new phone tablet ect. I love my s25 and have had no problems and the trade in program rocks! I love it!

    Reviewed in the United States on April 6, 2025

    Galaxy S21 5G 128GB - Purple - Unlocked
  • J

    Jakson B.

    Purchased on November 16, 2024

    Verified purchase

    I recently purchased a refurbished Samsung Galaxy S21 from BackMarket, and I couldn't be happier with my experience. Here's a breakdown of my thoughts The phone arrived in excellent condition, just as described on the website. I opted for the "Excellent" grade, and true to its word, the device looked almost brand-new. There were no noticeable scratches or signs of wear, and the performance has been flawless so far. Pricing The pricing was very competitive compared to buying new or from other retailers. I saved a significant amount without sacrificing quality, which made it feel like a great deal. Shipping and Packaging The shipping was fast and efficient. The phone was securely packaged, ensuring it arrived in perfect condition. I appreciated the eco-friendly packaging, which aligns with BackMarket's commitment to sustainability. Performance The Samsung S21 is a fantastic phone with a vibrant display, excellent camera quality, and speedy performance. Thanks to BackMarket's thorough refurbishing process, the device operates like new. Overall Experience BackMarket provided a seamless buying experience. From the user-friendly website to the quality of the product, everything exceeded ...

    Reviewed in the United States on November 19, 2024

    Galaxy S21 5G 128GB - Purple - Unlocked
  • R

    Rayge G.

    Purchased on November 28, 2024

    Verified purchase

    Great purchase on my end, I was still using the S9 before this so it was due for retirement unfortunately, still love my S9 though. This S21 is better in several ways. even being refurbished. it charges in a bit over an hour, the back is plastic so you don't need to worry about the phone flexing in your pocket and cracking, an issue I ran into with my old S9 partly because I procrastinated getting a case. The cameras on this are great, the quality is nice, and I'm not sure which processor it uses but it runs really smooth. It's got the average 60 hertz display and the fast and snappy 120 hertz display that you can cycle through, 9/10 phone imo

    Reviewed in the United States on January 2, 2025

    Galaxy S21 5G 128GB - White - Unlocked
  • T

    Teresa R.

    Purchased on November 24, 2024

    Verified purchase

    The phone was in excellent condition. I had no issues swapping phones and have run across no glitches. I am very pleased. As someone who doesn't need the newest item, just a good functioning one, I am pleased to find a place I can find refurbished items without worry.

    Reviewed in the United States on December 14, 2024

    Galaxy S21 5G 128GB - Purple - Unlocked
  • S

    Seth M.

    Purchased on November 12, 2024

    Verified purchase

    The phone is very amazing ..what i love most about it it the camera and its weight very light...the phone was in very good condition...had to tell its a. Refurbished phone... Back market goods..salu

    Reviewed in the United States on December 12, 2024

    Galaxy S21 5G 128GB - Gray - Unlocked
  • A

    Andy J.

    Purchased on October 17, 2023

    Verified purchase

    This is the 2nd Samsung smartphone we bought from Back Market. This Samsung Galaxy S21 5g Unlocked 256gb was listed as Fair condition and besides the few scratches on the back of phone, you would have never known it was a refurbished phone.

    Reviewed in the United States on November 1, 2023

    Galaxy S21 5G 256GB - Gray - Unlocked
  • C

    Christian R.

    Purchased on May 10, 2025

    Verified purchase

    The person who the phone was for was used to new condition phones, and the scuffs and scratches were a little difficult during unboxing while I gifted the phone to the person. However, the phone started and setup quickly with the person's Google account and Samsung account, it was grand. We are very satisfied with Back Market, and we with the phone could have been buffed and shiny, but we got a great deal, so that's OK. Thank you!

    Reviewed in the United States on July 6, 2025

    Galaxy S21 5G 128GB - Gray - Unlocked
  • G

    Gene G.

    Purchased on March 2, 2025

    Verified purchase

    Arrived on time. Listed as "Fair Condition". When I opened the well packed box, my phone visually looked Brand New. No scratches no nothing. When I took my phone(Galaxy S21 5g 128) to my Service Provider there was NO PROBLEMS or ISSUES. I GOT MORE THAN I PAID FOR!

    Reviewed in the United States on March 20, 2025

    Galaxy S21 5G 128GB - Gray - Unlocked
See all 2,253 reviews

Benefits of buying a refurbished Samsung Galaxy S21


At Back Market, customers save big compared to the price of new on certified refurbished Samsung Galaxy S21 5G models. The best part is, you don't have to sacrifice performance quality in order to save money; all refurbished devices on our marketplace have been fully reconditioned, cleaned, inspected and tested to the same standards as a new one. This is the biggest difference between buying a used or pre-owned Samsung Galaxy S21 compared to a refurbished one.

Buying a renewed Samsung Galaxy S21 is also a much better option for the environment. A refurbished Samsung Galaxy S21 5G is often a second-hand device that has been restored and updated to meet the Samsung's manufacturer standards, which means you'll be helping to keep old Samsung Galaxy's out of our landfills, reduce electronic waste, and minimize your carbon footprint.

Samsung Galaxy S21 5G Review


Where to buy a refurbished Samsung Galaxy S21


You'll find the biggest selection, highest product quality and lowest prices on restored Samsung Galaxy S21 5G models at Back Market. That's because we specialize specifically in refurbished tech and take the time to carefully vet every seller on our marketplace to ensure customers are getting reliable devices that perform like-new. We have hundreds of refurbed Samsung Galaxy S21 5G phones in price ranges to fit almost anyone's smartphone budget.

Staying true to our brand, we're also a huge advocate for environmental change. In fact, at the beginning of 2023, we hit a milestone for preventing 1 million tons of carbon emission (CO2e) from entering the atmosphere. You can help contribute to a better circular economy when you shop Samsung Galaxy S21 deals on our platform. 

 

Samsung Galaxy S21 5G warranty and return policy


All Samsung Galaxy S21 5G purchases on Back Market come with free standard shipping, a 1-year warranty, and a 30-day money-back guarantee. We want to make sure you can shop with confidence and find the best Samsung Galaxy for your needs at lower prices.

 

What to expect when buying a refurbished Samsung Galaxy S21 5G


If you're a first time refurbished buyer, you might not be sure what to expect from your purchase. First, understand that your Samsung Galaxy S21 may have external cosmetic flaws depending on the condition you choose (Back Market offers devices of Fair, Good and Excellent quality). However, whatever the condition, any external blemishes will not affect the performance of your Samsung Galaxy and you can expect your device to perform as if it were newly opened directly from the Samsung Store.

You should also be confident that your Samsung Galaxy S21 is backed by a 1-year warranty, meaning in the rare case that any defects arise (outside of accidental damage) within 12 months of your delivery date, then you're entitled to your choice of a repair, replacement or reimbursement. 


Smartphone Trade In


If you already have a smartphone that you're looking to replace, consider trading it into Back Market to give you a little extra budget for your next smartphone upgrade. We make the process simple for you and we'll give you a free online quote when you answer a few easy questions about your current smartphone. 

Trade in your smartphone

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