Refurbished Galaxy S21 Ultra 5G

Name: Used & Refurbished Galaxy S21 Ultra 5G for Sale
Brand: Back Market
Price: 236.99 USD
Availability: InStock
Rating: 4.21 (1931 reviews)

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Galaxy S21 Ultra 5G • Unlocked

(1,407)

Starting at

Refurbished price:$236.99

Versus $1,299.99 new

+2 more colors

Galaxy S21 Ultra 5G • Locked Verizon

(41)

Starting at

Refurbished price:$261.38

Versus $1,500.00 new

+2 more colors

Galaxy S21 Ultra 5G • Locked AT&T

(38)

Starting at

Refurbished price:$295.00

Versus $1,500.00 new

Galaxy S21 Ultra 5G • Locked T-Mobile

(74)

Starting at

Refurbished price:$299.88

Versus $1,500.00 new

+1 more colors

Smartphones

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

In June2026, Galaxy S21 Ultra 5G prices starts at $215.99, but prices vary based on storage, color, condition and carrier compatibility.

Customer reviews for Refurbished Galaxy S21 Ultra 5G

Overall rating

1,931 verified reviews

Rating details

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

Reviews

Christine P.
Verified purchase
Reviewed 2/15/26, United States.
I love my Galaxy S21, it is quite a bit larger than my last phone. I don't know why it took me so long to upgrade. Never disappointed with buying from Back Market.
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
2/7/26
Billy H.
Verified purchase
Reviewed 11/27/25, United States.
Wow, kudos to Black Market for their novel approach to sales: selling brand new, flawless phones as 'refurbished'. I mean, who needs transparency, right? It's not like customers might feel misled when they get a phone that's literally perfect. But seriously... But let's talk about my recently purchased Samsung Galaxy S21 Ultra - it's a stunning device. The display is vibrant, the camera is incredible, and performance is top-notch. I mean, you'd never guess it's refurbished; it looks and performs like brand new! If you're in the market for a high-end device and want a brand new phone at a refurbished price (wink), I'd say go for it. Just don't try to tell anyone it's 'refurbished'. HA! Product: Samsung Galaxy S21 Ultra Rating: 5/5 stars (for the product, and the sales pitch)
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
11/12/25
Philip H.
Verified purchase
Reviewed 10/13/25, United States.
I was very sceptical about buying a refurbished phone, but after reading other reviews I took the chance and I'm glad I did. I purchased for my wife so that we can have the same phones. The only issue, may not be an issue, is there is three permanent light hard to see rings, about the size of a small button on the screen, it's only visible in photos when looking at pictures, other than that, the phone is perfect. I highly recommend others to purchase their phones through back market.
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
9/24/25
Wynsergs rave M.
Verified purchase
Reviewed 1/2/26, United States.
This is so super great, when i had it this phone it makes me happy that i bought my dream phone that i earned. I don't have to waste a thousand dollar for this phone. The performance was so great you won't realize that is a refurbished after all, from the good pictures of taking photos on camera to the perfomance when you take so much apps. For the great price of 200 dollars you can have a great phone for taking pictures and high graphics on playing online games.
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
12/25/25
Nikki H.
Verified purchase
Reviewed 2/25/26, United States.
This is a great backup phone. Despite the "fair" condition it only has a scratch on the screen which isn't noticeable while using it. The functionality it's perfect and what I expect from a Samsung S series.
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
2/11/26
Joe M.
Verified purchase
Reviewed 3/19/26, United States.
It's Great 👍 Really User friendly. lots memory for pictures and for different apps . She really like the Big Screen and the camera Takes Awesome Pictures and videos . Would recommend it Anyone looking for a Great Phone 📱
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
3/8/26
Olivia L.
Verified purchase
Reviewed 4/7/25, United States.
I was a bit hesitant to order my phone at first since I’d never bought a refurbished device before, and I had seen a few negative reviews on social media. But I decided to give it a try, and I’m so glad I did! The shipping was quick, the phone looks brand new, and it runs perfectly — you’d never guess it’s refurbished. I’ll definitely be ordering again!
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Galaxy S21 Ultra 5G 128GB - Silver - 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
3/23/25
Agneeshwar V.
Verified purchase
Reviewed 3/18/26, United States.
I ordered with a 50/50 mindset. The phone I received was in great shape. Looked like a brand new phone. No charging issues yet. Battery life is good. Camera works fine. As of now I have no issues with the phone. I gifted the phone to my dad. I will buy next phone with back market soon👍🏽
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
3/12/26
Elsa E.
Verified purchase
Reviewed 8/7/25, United States.
I chose the Premium Option and the equipment arrived intact, brand new. Thank you very much Back Market. I will definitely buy again.😃😃😃♥️♥️
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
Galaxy S21 Ultra 5G 128GB - Silver - Unlocked
See item
Condition
Premium
Close to perfection. The body may have tiny micro-scratches. For items with screens, the screen will be flawless.
Purchased
8/4/25
Michael t W.
Verified purchase
Reviewed 11/11/24, United States.
This is my fourth phone Ive gotten from backmarket!! WHY? Because searching the net up and down ..Backmarket alwasy seemed tpo have the best deal.One big reason is the first two had clear new screens and the phone was refurbished.This time i got a galaxy s21..It is brand new looking..Super good phone.Super happy-PEACE
Galaxy S21 Ultra 5G 128GB - Black - Unlocked
Galaxy S21 Ultra 5G 128GB - Black - 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
9/11/24

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Refurbished Galaxy S21 Ultra 5G – Fast connectivity device

The refurbished Samsung Galaxy S21 Ultra 5G from Back Market is a high-performing device that has been thoroughly tested to ensure it gets the job done right, right away. It has been refurbished to give it new and exciting features, thus performing like a brand new Galaxy S21 Ultra 5G. If you prefer a Samsung phone that guarantees fast connectivity, the refurbished Galaxy S21 Ultra 5G is your best bet. It has a powerful and intelligent battery that stores adequate power to keep it running all day long. Would you like to take some memorable photos and videos with your family and friends? The device has a high-resolution camera to help you shoot stunning photos and videos any time of the day. The refurbished Galaxy S21 Ultra 5G will help you discover more anywhere and anytime. The S21 Ultra 5G belongs to the Galaxy S21 series, which has been released 2021.

Significant features to find in Galaxy S21 Ultra 5G refurbished device

The first thing you’ll love about the refurbished Samsung Galaxy 21 Ultra 5G is its fast processor and robust connectivity. Its processor and 5G network connectivity allow you to perform various activities such as browsing, live streaming, video editing, and story sharing in a flash. You can also multi-task without it running slowly. It has a 5,000 mAh battery that can last for over 11 hours, ensuring you stay connected to the outside world.
The refurbished Galaxy S21 Ultra 5G helps you capture the best moments in your life, thanks to its highest resolution camera. It has 108MP and an upgraded sensor to take crisp, clear, and colourful photos and videos. The multi-lens camera helps you zoom in with more clarity from multiple angles. Also, its super-sleek 8k video will help you to shoot HD videos during the day and at night. You can use its camera to create share-ready GIFs in a single take. In other words, its camera makes you feel like you have a professional studio wherever you go.
When it comes to displaying, the refurbished Samsung Galaxy 21 Ultra 5G helps you focus on what’s shown on the screen without straining your eyes. It has a high contrast ratio and a 6.8-inch adaptive screen display that will automatically adjust from 10Hz to 120 Hz. Also, it has intuitive blue-light management that changes depending on the time of the day to take care of your eyes.
You can store all your photos, videos, and documents with the refurbished S21 Ultra 5G, thanks to its 128GB internal memory. The device has everything to help you explore and discover more!

Why buy a cheap Galaxy S21 Ultra 5G from Back Market?

Buying a refurbished Samsung Galaxy 21 Ultra 5G from Back Market has various exciting perks. The device is cheap and guarantees the same high-quality features, just like a brand new S21 Ultra 5G. Back Market ensures that the device is meticulously refurbished to function as its original counterpart. As a result, you’ll purchase a high-performing device and save some money.

If you’re eco-conscious, the device conserves the environment by saving 8 Oz of e-waste. You’ll also enjoy 30 days to change your mind if it doesn’t impress you and a 1-year warranty. Are you looking for a cheaper phone than the S21 Ultra 5G but you still want a top notch phone? Then we can recommend you the Galaxy S21 Plus 5G or even the Galaxy S20 Ultra 5G, that has been released in 2020.

Does a refurbished Galaxy S21 Ultra 5G have an external memory slot?

Unfortunately, this phone doesn’t have an external memory slot for a MicroSD card. However, you can use its large internal 128GB memory to store all your media files, apps, and essential documents.

Is refurbished Samsung Galaxy 21 Ultra 5G single or dual sim?

The device is a single sim.

What other accessories are included in Galaxy S21 Ultra 5G?

All Samsung Galaxy 21 Ultra 5G come with a compatible charging cable. However, you won’t find an AC adapter and headphones since they contribute to e-waste, because most likely you already have an adapter and headphones.

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Refurbished Galaxy S21 Ultra 5G

Trade in to get it for less

Galaxy S21 Ultra 5G • Unlocked

Galaxy S21 Ultra 5G • Locked Verizon

Galaxy S21 Ultra 5G • Locked AT&T

Galaxy S21 Ultra 5G • Locked T-Mobile

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

Reviews

Reviews

Christine P.

Billy H.

Philip H.

Wynsergs rave M.

Nikki H.

Joe M.

Olivia L.

Agneeshwar V.

Elsa E.

Michael t W.

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