Refurbished Samsung Galaxy S21 (5G)

Compare devices

3 products

Trade in to get it for less

Today’s purchase could set you back a lot less when you trade in an old device at the same time.

Galaxy S21 5G • Unlocked

(3,047)

Starting at

Refurbished price:$139.99

Versus $799.00 new

+1 more colors

Galaxy S21 5G • Locked AT&T

(26)

Starting at

Refurbished price:$128.99

Versus $799.00 new

+1 more colors

Galaxy S21 5G • Locked T-Mobile

(99)

Starting at

Refurbished price:$259.00

Versus $849.00 new

Smartphones

How much does the Galaxy S21 5G cost? | June 2026

In June2026, Galaxy S21 5G prices starts at $139.99, but prices vary based on storage, color, condition and carrier compatibility.

Customer reviews for Refurbished Samsung Galaxy S21 (5G)

Overall rating

4,763 verified reviews

Rating details

Battery
4.1/5
Shipping
4.5/5
Lens & Camera
4.4/5
Accessories
4.1/5
Packaging
4.4/5
Overall performance
4.1/5
Appearance
4.2/5

Reviews

Harry M.
Verified purchase
Reviewed 2/15/26, United States.
Great product! Looks and acts like it is new. Specifically being used to extend medical device signals to my personall Cell Phone. Very pleased with the quality and expediant delivery. It's my second device from Back Market and both have been great!
Galaxy S21 5G 128GB - Gray - Unlocked
Galaxy S21 5G 128GB - Gray - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
2/2/26
Heriberto D.
Verified purchase
Reviewed 1/22/25, United States.
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 !!!
Galaxy S21 5G 128GB - Gray - Unlocked
Galaxy S21 5G 128GB - Gray - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
1/18/25
Valorie C.
Verified purchase
Reviewed 11/25/25, United States.
I ordered my Galaxy S21 5G from Backmarket after a recommendation from a rep at a local battery shop. My other Samsung was having numerous issues but a brand new phone was not an option. Luckily, I had jotted down the info and looked up Backmarket that same night and was impressed with the reviews. It was easy to order and arrived as promised. It sat on my side table for a couple of weeks as I was unsure if I could do the set up myself. Thank goodness for You Tube! Tech savvy I am not. But I do know how to follow directions and save for a couple of little hiccups, I was up and running in an hour. So far, so good and I would recommend Backmarket to anyone looking to upgrade for a lot less.
Galaxy S21 5G 128GB - Gray - Unlocked
Galaxy S21 5G 128GB - Gray - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
11/12/25
Theresa M.
Verified purchase
Reviewed 11/24/25, United States.
Arrived quickly and well packaged. I appreciate that you guys have a page to help with transferring info from old devices to new ones, so it was super easy to switch my phone over. I'm so happy I found this company - I prefer buying refurbished and used things, especially when they work perfectly fine. Very affordable too.
Galaxy S21 5G 256GB - Gray - Unlocked
Galaxy S21 5G 256GB - Gray - Unlocked
See item
Condition
Good
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
11/13/25
Jakson B.
Verified purchase
Reviewed 11/19/24, United States.
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 my expectations. If you're looking to save money while supporting sustainability, I highly recommend checking out BackMarket. Rating: 5/5
Galaxy S21 5G 128GB - Purple - Unlocked
Galaxy S21 5G 128GB - Purple - Unlocked
See item
Condition
Good
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
11/16/24
Kody S.
Verified purchase
Reviewed 3/12/26, United States.
I am pleased to say that she was able to activate and use her phone she loves it. I am glad that I received it and had no issues compared to the new phone I bought on Amazon store front and it was locked and had to send back get money back. So thank you for making my wife happy. Happy wife happy life.
Galaxy S21 5G 128GB - Gray - Unlocked
Galaxy S21 5G 128GB - Gray - Unlocked
See item
Condition
Excellent
Almost no signs of wear. The body may have very light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
2/13/26
Franchesca I.
Verified purchase
Reviewed 4/6/25, United States.
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!
Galaxy S21 5G 128GB - Purple - Unlocked
Galaxy S21 5G 128GB - Purple - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
3/24/25
Andy J.
Verified purchase
Reviewed 11/1/23, United States.
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.
Galaxy S21 5G 256GB - Gray - Unlocked
Galaxy S21 5G 256GB - Gray - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
10/17/23
Lisa P.
Verified purchase
Reviewed 1/5/26, United States.
Not only was the phone shipped promptly but it is the best Galaxy s21 I've ever owned performance-wise The buttons are not hard like my other one that I bought off of eBay The phones performances super fast and the phone was not scratched in any way it's in great condition it must have a lot of memory because like I said the processor is super fast I'm very happy and will no longer buy a phone from anyone else but back market.
Galaxy S21 5G 128GB - Gray - Unlocked
Galaxy S21 5G 128GB - Gray - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
12/22/25
Rayge G.
Verified purchase
Reviewed 1/2/25, United States.
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
Galaxy S21 5G 128GB - White - Unlocked
Galaxy S21 5G 128GB - White - Unlocked
See item
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
11/28/24

Read our guides

Our recent comparisons

Searches so popular you can't sit with them

Galaxy S6 Edge iPhone Green Nothing Phone (1)Samsung Galaxy Mother's Day OnePlus iPhone 5c Huawei P8 Valentine's day Father's Day

Choose location

Suggested searches

Popular searches

Refurbished Samsung Galaxy S21 (5G)

Trade in to get it for less

Galaxy S21 5G • Unlocked

Galaxy S21 5G • Locked AT&T

Galaxy S21 5G • Locked T-Mobile

How much does the Galaxy S21 5G cost? | June 2026

Reviews

Reviews

Harry M.

Heriberto D.

Valorie C.

Theresa M.

Jakson B.

Kody S.

Franchesca I.

Andy J.

Lisa P.

Rayge G.

Read our guides

Samsung Galaxy S25 Ultra vs S24 Ultra: Is it worth the upgrade? | Back Market

Samsung Galaxy S25 review: Is it still worth it with the Galaxy S26 out? | Back Market

Samsung Galaxy S23 Ultra review | Back Market

Reviewing the Galaxy S9 - Still worth it in 2023? | Back Market

Samsung Galaxy S10 review: Is it worth it? | Back Market

Samsung Galaxy S24 review | Back Market

Samsung Galaxy Z TriFold review | Back Market

Our recent comparisons

Galaxy S25 • Unlocked vs iPhone 16 • Unlocked comparison

Galaxy S6 • Unlocked vs Galaxy S7 • Unlocked comparison

Galaxy S25 Ultra • Unlocked vs iPhone 16 Pro Max • Unlocked comparison

Galaxy S25 • Unlocked vs iPhone 15 • Unlocked comparison

Galaxy S24 Ultra • Unlocked vs Google Pixel 6a • Unlocked comparison