• 1-year warranty
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Refurbished Samsung Galaxy S21 series

123 products
Bestseller
Galaxy S21+ 5G - Unlocked

Galaxy S21+ 5G - Unlocked

128 GB - Black

Warranty: 12 months
4.4/5
(157)
Starting at
$178.49
$1,000.00 new
Bestseller
Galaxy S21 Ultra 5G - Unlocked

Galaxy S21 Ultra 5G - Unlocked

128 GB - Black

Warranty: 12 months
4.3/5
(213)
Starting at
$262.49
$1,299.99 new
Bestseller
Galaxy S21 5G - Unlocked

Galaxy S21 5G - Unlocked

256 GB - Gray

Warranty: 12 months
4.2/5
(550)
Starting at
$213.08
$850.00 new
Galaxy S21 5G - Unlocked

Galaxy S21 5G - Unlocked

128 GB - Purple

Warranty: 12 months
4.2/5
(605)
Starting at
$167.99
$799.00 new
Galaxy S21 FE 5G - Unlocked

Galaxy S21 FE 5G - Unlocked

128 GB - Gray

Warranty: 12 months
4.3/5
(80)
Starting at
$160.78
$699.99 new
Galaxy S21+ 5G - Unlocked

Galaxy S21+ 5G - Unlocked

128 GB - Purple

Warranty: 12 months
4.4/5
(157)
Starting at
$178.49
$772.51 new
Galaxy S21 Ultra 5G - Unlocked

Galaxy S21 Ultra 5G - Unlocked

256 GB - Black

Warranty: 12 months
4.3/5
(214)
Starting at
$314.99
$1,026.20 new
Galaxy S21 5G - Unlocked

Galaxy S21 5G - Unlocked

128 GB - White

Warranty: 12 months
4.2/5
(552)
Starting at
$163.25
$799.99 new
Galaxy S21 5G - Unlocked

Galaxy S21 5G - Unlocked

128 GB - Pink

Warranty: 12 months
4.2/5
(551)
Starting at
$169.83
$799.00 new
Galaxy S21 Ultra 5G - Unlocked

Galaxy S21 Ultra 5G - Unlocked

128 GB - Silver

Warranty: 12 months
4.3/5
(214)
Starting at
$262.49
$1,199.99 new
Galaxy S21+ 5G - Unlocked

Galaxy S21+ 5G - Unlocked

256 GB - Black

Warranty: 12 months
4.4/5
(157)
Starting at
$226.12
$1,000.00 new
Galaxy S21+ 5G - Unlocked

Galaxy S21+ 5G - Unlocked

128 GB - Silver

Warranty: 12 months
4.4/5
(157)
Starting at
$202.23
$999.99 new
Galaxy S21 FE 5G - Unlocked

Galaxy S21 FE 5G - Unlocked

128 GB - Green

Warranty: 12 months
4.2/5
(61)
Starting at
$194.00
$699.99 new
Galaxy S21+ 5G - Locked T-Mobile

Galaxy S21+ 5G - Locked T-Mobile

128 GB - Black

Warranty: 12 months
4.2/5
(5)
Starting at
$156.38
$1,000.00 new
Galaxy S21 FE 5G - Unlocked

Galaxy S21 FE 5G - Unlocked

128 GB - Purple

Warranty: 12 months
4.2/5
(61)
Starting at
$192.00
$699.99 new
Galaxy S21 FE 5G - Locked AT&T

Galaxy S21 FE 5G - Locked AT&T

128 GB - Gray

Warranty: 12 months
4.7/5
(8)
Starting at
$139.18
$699.99 new
Galaxy S21 Ultra 5G - Unlocked

Galaxy S21 Ultra 5G - Unlocked

512 GB - Black

Warranty: 12 months
4.3/5
(213)
Starting at
$403.70
$1,499.99 new
Galaxy S21 FE 5G - Locked Verizon

Galaxy S21 FE 5G - Locked Verizon

128 GB - Gray

Warranty: 12 months
4.4/5
(7)
Starting at
$142.00
$699.99 new
Galaxy S21 5G - Locked AT&T

Galaxy S21 5G - Locked AT&T

128 GB - Gray

Warranty: 12 months
5/5
(3)
Starting at
$152.02
$988.99 new
Galaxy S21 5G - Locked T-Mobile

Galaxy S21 5G - Locked T-Mobile

128 GB - Gray

Warranty: 12 months
4.3/5
(12)
Starting at
$157.72
$799.00 new
Galaxy S21 FE 5G - Locked T-Mobile

Galaxy S21 FE 5G - Locked T-Mobile

128 GB - Gray

Warranty: 12 months
4.8/5
(3)
Starting at
$151.99
$699.99 new
Galaxy S21 5G - Locked Verizon

Galaxy S21 5G - Locked Verizon

128 GB - Gray

Warranty: 12 months
3.9/5
(7)
Starting at
$171.59
$799.00 new
Galaxy S21+ 5G - Locked AT&T

Galaxy S21+ 5G - Locked AT&T

128 GB - Black

Warranty: 12 months
5/5
(1)
Starting at
$192.02
$999.00 new
Galaxy S21 5G - Unlocked

Galaxy S21 5G - Unlocked

128 GB - Black

Warranty: 12 months
4.2/5
(552)
Starting at
$231.22
$459.00 new
Galaxy S21 FE 5G - Unlocked

Galaxy S21 FE 5G - Unlocked

128 GB - Dark Blue

Warranty: 12 months
4.2/5
(61)
Starting at
$191.00
$699.99 new
Galaxy S21+ 5G - Locked T-Mobile

Galaxy S21+ 5G - Locked T-Mobile

256 GB - Black

Warranty: 12 months
4.3/5
(6)
Starting at
$219.00
$1,000.00 new
Galaxy S21 FE 5G - Unlocked

Galaxy S21 FE 5G - Unlocked

256 GB - Gray

Warranty: 12 months
4.2/5
(61)
Starting at
$240.00
$699.99 new
Galaxy S21 FE 5G - Unlocked

Galaxy S21 FE 5G - Unlocked

128 GB - White

Warranty: 12 months
4.2/5
(61)
Starting at
$177.05
$599.00 new
Galaxy S21 5G - Locked T-Mobile

Galaxy S21 5G - Locked T-Mobile

128 GB - White

Warranty: 12 months
4.3/5
(12)
Starting at
$147.83
$899.99 new

Refurbished Samsung Galaxy S21 series's customer reviews

4.2/5

1,096 verified reviews in the last 6 months.

  • M

    Michael E.

    Purchased on February 2, 2024

    4/5

    The Samsung S21 Ultra appears to be fine in the two weeks since we received it and was as promised. Ordering was easy and delivery was as expected. Our trade-in offer was much lower than we had anticipated ($25.00) for a phone in complete working order without problems. I have previously purchased certified, refurbished smartphones directly from Samsung and felt we received a much better & fairer trade-in offer. While the price of the S21 Ultra was cheaper from Back Market, I believe that I might have fared better buying from Samsung in terms of overall cost. I will research more closely when it's time for our next purchase.

    Reviewed in the United States on February 19, 2024

    Galaxy S21 Ultra 5G 128GB - Black - Unlocked
  • S

    Shawn N.

    Purchased on May 20, 2024

    4.6/5

    The phone is amazing and just as I expected. It did have a small scratch on the front that is deep enough to see when the phone isn't on when I ordered the excellent version, but other than that it's great!! I would definitely recommend it to anyone looking to buy refurbished!

    Reviewed in the United States on July 1, 2024

    Galaxy S21 Ultra 5G 128GB - Black - Unlocked
  • S

    Scott K.

    Purchased on April 16, 2024

    4.5/5

    I was skeptical About buying a refurbished model but everything turned out great.The phone is an awesome condition.And it came with a screensaver already on the phone. There was no problems in updating the phone or getting it programmed correctly.

    Reviewed in the United States on July 1, 2024

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

    Sabrina D.

    Purchased on March 25, 2024

    5/5

    Delivery was on time. The phone itself came with a screen protector already on. (that was so nice) It has one or two little scratches on it but that is to be expected because its refurbished. Honestly once you put a phone case on you cant see it anymore. All in all I would recommend backmarket to friends and family. I'm so happy I got my Andrew (android) back lol!

    Reviewed in the United States on July 1, 2024

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

    Gerald P.

    Purchased on March 10, 2024

    4.5/5

    Trading in my beat-up S21Ultra with damaged screen for this excellent condition replacement enabled me to, in turn, take advantage of trade-in promotion at Samsung Store. My old phone was worthless for trade-in otherwise. The refurbisher who purchased my trade-in tried to claim that it didn't take a charge... but with my photos in hand, the Backmarket staff swiftly dealt with that. Be sure to take photos of live phone, and of each stage of packaging, so that Backmarket is able to support you in case of dispute. Great customer service!

    Reviewed in the United States on July 1, 2024

    Galaxy S21 Ultra 5G 128GB - Black - Unlocked
  • G

    Gene B.

    Purchased on February 29, 2024

    5/5

    the whole experience was seamless and great! couldn't have asked for a better experience. I purchased S21 Ultra 256gb Unlocked. while I was hesitant about buying a refurbished device, then my device showed up and all the hesitance went right away! will purchase from again !

    Reviewed in the United States on March 21, 2024

    Galaxy S21 Ultra 5G 256GB - Black - Unlocked
  • T

    Tom Z.

    Purchased on February 24, 2024

    5/5

    I'm very pleased with the phone.l really enjoy not having to spend a lot of money on the latest and greatest products out there. To be able to buy a refurbished phone and have it perform as good as it does makes me happy.

    Reviewed in the United States on March 29, 2024

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

    Tia G.

    Purchased on February 16, 2024

    5/5

    This is my second order from Back Market, and again I am in love with my new phone. I first ordered a iPhone 8 for my daughter to test out how I would feel about refurbished phones, as soon as hers arrived I immediately ordered mine. I ordered excellent condition and that's what I received. It's working perfectly.

    Reviewed in the United States on March 5, 2024

    Galaxy S21+ 5G 128GB - Purple - Unlocked
  • L

    Lilly R.

    Purchased on February 27, 2024

    5/5

    I have purchased from BackMarket before (back in 2021) and loved my S9+! I recently decided to upgrade to the S21 and, of course, knew that BackMarket would be my best option! This time around I decided to go with the, "Good" condition option (went with "Excellent" for my S9+) and I'm honestly very, very pleased. There are a few scuff marks on the back of the phone, and there's a slight scratch on the screen, though neither are very noticeable! All in all, I would (and do!) - highly- recommend buying refurbished, and buying refurbished from BackMarket at that!

    Reviewed in the United States on March 14, 2024

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

    Philip A.

    Purchased on February 7, 2024

    4.1/5

    I was encouraged by another customer review to just take the leap and buy one of the refurbished phones. There was some fear, but the phones arrived sooner than expected and in excellent shape. So the Back Market experience was positive, we're just not sure we love the phones yet - there are some things to get used to and it seems to want to update more than we would prefer. Hopefully things will improve, but so far I'm not convinced we made the right choice.

    Reviewed in the United States on February 18, 2024

    Galaxy S21 5G 128GB - Gray - Unlocked
See all 1,096 reviews

Read our guides

Refurbished Galaxy S21 Series – High-performance phones in your hands

The refurbished Samsung Galaxy 21 series come in a series of three phones that have been thoroughly and painstakingly tested to ensure they work right in record time. Whether you prefer a refurbished Galaxy S21 5G, Galaxy S21 Plus 5G, or Galaxy S21 Ultra 5G, Back Market has a suitable phone for you. Refurbished Galaxy S21 Series are high-performance devices with ultra-fast connectivity. They are perfect for downloading, streaming, and connecting with friends. Galaxy S21 Series have powerful and sustainable batteries to keep them running for a long time. They have ample storage space to help you store all your media files and documents. If you wish to capture some exciting moments with your loved ones, these phones have high-resolution cameras that guarantee crystal-clear photos and videos.

Significant Features to find in Samsung Galaxy 21 refurbished devices

  • The refurbished Samsung Galaxy S21 5G is the smallest of the three phones. It has a 6.2-inch display that comfortably fits your hand's palm. The device's 5G network connectivity lets you quickly browse, stream, and connect with friends. It has a 4,000mAh battery that allows your phone to run all day long. You can use it to take colourful pictures and videos, thanks to its 64MP camera and extra-sleek 8K video. The phone has 128GB of internal memory for storing videos, music, photos, and apps.

  • If you need a slightly smaller refurbished Samsung 21 device, Galaxy S21 Plus 5G can be your best bet. The phone has a 6.7-inch display, larger than Galaxy S21 5G. Its 5G connectivity and powerful processor ensures you download, stream, and connect with others in record time. Also, the refurbished Galaxy S21 Plus 5G has a 4,800mAh battery to help it run throughout the day. It has a 64GB rear camera to take stunning photos and videos like a pro. You can use its 128GB internal memory to store your media files.

  • The refurbished Samsung Galaxy 21 Ultra 5G is the most powerful device in the series. It has 16GB of RAM and 5G network connectivity for high efficiency. It is also the largest, with a 6.8-inch display and the biggest battery at 5,000mAh. If you wish to capture the best moments in your life, the phone has a 108MP camera and a sensor that takes crisp, clear, and colorful photos and videos. You can use its 128GB internal memory to store your photos, videos, audio, and documents.

Why buy cheap Samsung Galaxy 21 series from Back Market?

There are various things you'll love about the refurbished Galaxy S21 series when you compare them to their original counterparts. These devices are cheaper, helping you to save more money. Despite being sold as secondhand devices, they have been thoroughly refurbished to provide them with new and powerful components. You don't have to worry about using a slow processing phone since they are crafted to function like their brand new counterparts. Additionally, these phones come in handy when reducing e-waste. They are the go-to devices for anyone who's eco-conscious. The devices offer 30 days to change your mind if your preferred choice doesn't impress you. Lastly, these phones have a 1-year warranty so you can use your phone with much confidence.

What other accessories are included in Galaxy S21 series used devices?

All Samsung Galaxy 21 Series come with compatible charging cables. However, they don't include AC adapters and headphones since they contribute to e-waste.

Do the refurbished Galaxy S21 Series have external memory slots?

Unfortunately, these phones don't have external memory slots for MicroSD cards. However, you can use their large internal 128GB memory to store all your media files, apps, and essential documents.

Sell us your old Galaxy for cash towards the Galaxy S21

If you already have an older Samsung Galaxy model and you'd like to upgrade, don't just throw it away or leave it behind in a drawer. Let us help by paying you cash for your old phone so you have a little more room in your budget to upgrade to the Galaxy S21. Selling your Samsung Galaxy to Back Market is as easy as it gets: get a free offer from us in under 2 minutes online and upon approval, we'll pay for your shipping and send you a direct cash deposit once it's been received. You get paid and the planet catches a break from electronic waste - win win!

Here are a few great options for older models that you might be looking to sell: