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US Mobile - Prepaid SIM Kit
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For you? Only the best.
- Free delivery by Jun 16 - Jun 20
- Express delivery by Jun 13 - Jun 14 from $7.00
- Refurbished tech can help reduce e-waste, more than you think.
Refurbished and sold by BDSJ Tech
Live on Back Market since 2019
Accepts
Often bought together
Galaxy S21 Ultra 5G's customer reviews
403 verified reviews in the last 6 months.
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Lawrence W.
5/5Reviewed in the United States on December 29, 2022
Was kind of worried about a refurbished phone.Ordered the Samsung S21 ultra in very good condition. It came in 3 days. To my surprise it was in excellent condition. Stuck in sim card and fired it up and is running like a champ.Back market you have me as a customer forever.Galaxy S21 Ultra 5G 512GB - Phantom Black - UnlockedPurchased on December 17, 2022
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Levander L.
5/5Reviewed in the United States on February 26, 2023
Hello. This is my first time ever ordering a refurbished, well, anything! So needless to say. I cautiously ordered a Samsung S21 Ultra after reading through many reviews. Boy was i nervous. Not because of the reviews, but i was a mere virgin at this. All i wanted was an ultra with a snapdragon processor and screen and camera unblemished. And then there are the fakes i hear about. $450 on the line here. But i was absolutely blown away and on my children, i am not a bot but i ordered early morning and my phone arrived by the end of the next day. Back market made my freaking year! Im a 5 star satisfied,and from now on persisting customer. ThankGalaxy S21 Ultra 5G 128GB - Phantom Black - UnlockedPurchased on February 23, 2023
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Elijah P.
4.4/5Reviewed in the United States on April 26, 2023
Definitely a great pickup. Was hesitant because I know refurbished products are never as good as new but this phone seems to put that claim to rest. I did order the fun in very good condition, however. It has only been 2 weeks, but the Samsung Galaxy S21 Ultra has been good to me.Galaxy S21 Ultra 5G 256GB - Phantom Silver - UnlockedPurchased on April 13, 2023
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Phyllis H.
5/5Reviewed in the United States on January 7, 2023
Nothing short of awesome ! I wasn’t expecting such a nice phone when I purchased a refurbished one, but to my joy I was shocked. Delivery was very fast. Thank you Back Market, you made everything so easy !Galaxy S21 Ultra 5G 128GB - Phantom Black - UnlockedPurchased on December 24, 2022
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Troy C.
4.3/5Reviewed in the United States on May 15, 2023
Awesome phone. If this was refurbished, I couldn’t see one single nick or scratch. The phone works beautifully. I thought you guys were a scam at first, due to your super low prices, but I will shop here for tech goods and no where else again. You guys are fantastic. Thank you so much. AustinGalaxy S21 Ultra 5G 128GB - Phantom Black - Locked VerizonPurchased on April 25, 2023
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William D.
5/5Reviewed in the United States on April 16, 2023
I purchased a galaxy s21 ultra last year for myself. Recently I purchased another galaxy s21 ultra for my wife. Excellent product, never any problems, Back Market is my choice for reconditioned phones. Also they keep in touch to insure their customers are happy after the purchase..Galaxy S21 Ultra 5G 128GB - Phantom Black - UnlockedPurchased on March 8, 2023
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Musa T.
5/5Reviewed in the United States on February 4, 2023
I am very happy with my purchase of the Galaxy S21 Ultra. The phone is refurbished however its difficult to tell by how clean and in good condition it looks. I am very much satisfied with my purchase.Galaxy S21 Ultra 5G 128GB - Phantom Silver - UnlockedPurchased on February 1, 2023
Reborn vs. brand new
Here’s what you help prevent on average by choosing a reborn smartphone over a brand new one.
171.1 lbs of CO2e
That's like driving an SUV from NYC to Chicago.
6.3 oz of e-waste
That’s around the weight of a baseball.
537.1 lbs of raw materials
That's like 20 dogs digging in your yard for a week.
20,341.2 gallons of water
That's like running a faucet for 3 days
Everything you ever wanted to know about the Galaxy S21 Ultra 5G
Galaxy S21 Ultra 5G 512GB - Phantom Black Unlocked
Our partners are electronics experts who test and verify that each item is 100% functional before it leaves the workshop. This is the reason you benefit from a minimum 1-year warranty with the purchase of a refurbished device at Back Market.
Galaxy S21 Ultra 5G - 512 GB - Phantom Black - Unlocked
- Screen size (inches) : 6.8
- Carrier compatibility : Unlocked
- Storage : 512 GB
- Model : Galaxy S21 Ultra 5G
- Megapixels : 3200x1440
- OS : Android
- Network : GSM/CDMA + 5G
- Memory : 16 GB
- eSIM : Yes
- Foldable : No
- Connector : USB-C
- Release Date : January 2021
- Double SIM : No
- Manufacturer Ref. : SM-G998U
- 5G : Yes
- Series : Galaxy
- Color : Phantom Black
- Verizon compatible : Yes
- AT&T compatible : Yes
- T-Mobile compatible : Yes
- Release Year : 2021
- Memory Card Slot : No
- SAR head : 0.77
- SAR body : 1.02
- Dual SIM : Single-SIM + eSIM
- SIM format : Nano
- Series : Galaxy
- Brand : Samsung
- Weight : 8 oz
Welcome to Back Market
The best prices for high-quality reborn tech by sellers we’ve checked and vetted. We don’t mind if you Google us .
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- Free 30-day returns
- Free standard shipping
- 1-year warranty
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