Galaxy S21 5G • UnlockedWhite • 128 GB • Physical SIM + eSIM

(3,058 reviews)

$147.00

Save $652.99

Free delivery by Jun 10 - 11

Restored professionally

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Customer reviews for Galaxy S21 5G • Unlocked

Overall rating

3,058 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
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
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
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
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
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
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
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

Everything you ever wanted to know about the Galaxy S21 5G • Unlocked

Durability
Overall performance
Camera
Screen quality

SM-G991UZWAXAAMPN
Dynamic AMOLED 2XScreen type
8 GBMemory (GB)
NoFoldable
10 megapixelsFront camera
WhiteColor
2021Release Year
Samsung Galaxy SSerie
SamsungBrand

The Galaxy S21 5G is a flagship-level smartphone from Samsung, offering a balance of performance, 5G connectivity, and a modern design. Although it’s a few generations old, it still provides reliable performance for everyday use.

Key features:

Display: 6.2-inch Dynamic AMOLED 2X, FHD+ resolution
Processor: Exynos 2100 (Global) or Snapdragon 888 (USA)
Camera: Triple rear cameras with 12MP wide, 64MP telephoto, and 12MP ultrawide lenses
Storage: 128GB internal storage
Connectivity: 5G capable for fast network speeds

Who is this for?

The Galaxy S21 5G is suitable for users seeking a high-quality Android device with 5G support, a vibrant display, and versatile camera options. It’s ideal for tech enthusiasts, professionals, or anyone wanting a reliable smartphone for multimedia and communication.

Pros & Cons: Pros Cons Excellent display quality with vibrant colors and high refresh rate. No microSD slot for expandable storage. Powerful processor suitable for multitasking and gaming. Battery life may vary depending on usage, but not included in this description. Why refurbished?

Opting for a refurbished Galaxy S21 5G provides a high-quality device at a more accessible price point. Each device undergoes rigorous testing and quality checks to ensure functionality and condition. Back Market’s commitment to quality is detailed at Back Market Quality Standards.

MPN: SM-G991UZWAXAA
Screen type: Dynamic AMOLED 2X
Memory (GB): 8 GB
Foldable: No
Front camera: 10 megapixels
Color: White
Release Year: 2021
Serie: Samsung Galaxy S
Brand: Samsung
OS: Android
Manufacturer Ref.: SM-G991U
SAR head: 0.74
Carrier compatibility: Unlocked
Last OS Compatibility: Yes
Resolution: 1080 x 2400
Storage: 128 GB
Memory Card Slot: No
Model: Galaxy S21 5G
SAR body: 1.08
Weight: 6 oz
SIM card: Physical SIM + eSIM
Network: 5G
Connector: USB-C
Main camera: 12 megapixels
Color (official name): Phantom White
Screen size (inches): 6.2

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Galaxy S21 5G • UnlockedWhite • 128 GB • Physical SIM + eSIM

Galaxy S21 5G • UnlockedWhite • 128 GB • Physical SIM + eSIM

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Customer reviews for Galaxy S21 5G • Unlocked

Overall rating

Rating details

Reviews

Reviews

Harry M.

Heriberto D.

Valorie C.

Theresa M.

Jakson B.

Kody S.

Franchesca I.

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Everything you ever wanted to know about the Galaxy S21 5G • Unlocked

Durability

Overall performance

Camera

Screen quality

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