Galaxy S21 5G • Unlocked

(3,126 reviews)

$169.59

Save $680.41

Free delivery by Sep 16 - 17

Express delivery by Sep 15 - 16 from $15.00

Restored professionally

Based on up to 100 points of inspection

Often bought together

Galaxy S21 5G • Unlocked

Gray • 256 GB • Physical SIM + eSIM

Refurbished price:$169.59

Versus $850.00 new

Galaxy S21 protective screen - Tempered glass - Clear

Refurbished price:$14.99

Total price: $184.58

These items might be sold and shipped by different sellers.

Pairs well with

Galaxy S21 protective screen - Tempered glass - ClearBrand new
(6)
Refurbished price:$14.99
AirPods Pro 2 (2022)Fair
(843)
Refurbished price:$130.00
AirPods Pro 2 (2023)Fair
(700)
Refurbished price:$135.00
AirPods 2 (2019)Excellent
(3,329)
Refurbished price:$85.00
AirPods Max (2024)Fair
(54)
Refurbished price:$350.00
AirPods 4 (2024)Fair
(357)
Refurbished price:$93.00
AirPods Pro 3 (2025)Fair
(186)
Refurbished price:$180.00
AirPods 3 (2022)Good
(1,534)
Refurbished price:$90.00
AirPods Pro 1 (2021)Good
(659)
Refurbished price:$106.00
Price drop
AirPods Max (2020)Fair
(212)
Refurbished price:$290.00
Save $50.00
Last lowest price : $340.00
The lowest price for this product in this exact configuration on Back Market in the 30 days prior to 9/14/2026. This reference will update on 9/21/2026.
AirPods 3 (2021)Excellent
(1,528)
Refurbished price:$108.00
AirPods Pro 1 (2019)Excellent
(2,937)
Refurbished price:$110.00

Customer reviews for Galaxy S21 5G • Unlocked

Overall rating

3,126 verified reviews

Rating details

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

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
Michelle U.
Verified purchase
Reviewed 8/21/26, United States.
It is quite the upgrade, still learning as it is a little different than my S9+. The main reason for the upgrade is that I got Fitbit Versa and it was not compatible with the S9+ so there was lots to learn about setting up the fitbit, but setting up the S21 was easier.
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
8/7/26
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
Madison W.
Verified purchase
Reviewed 7/28/26, United States.
I absolutely love it. The color, the speed, the smaller size that actually fits in my hand. It is absolutely amazing and if I ever need a new one then I know where to go for good quality work amd amazing service.
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
7/17/26
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

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Galaxy S21 5G • Unlocked

Restored professionally

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Customer reviews for Galaxy S21 5G • Unlocked

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Reviews

Reviews

Harry M.

Heriberto D.

Valorie C.

Michelle U.

Jakson B.

Madison W.

Theresa M.

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