

Battery
4.2/5
Shipping
4.3/5
Lens & Camera
4.4/5
Accessories
3.9/5
Packaging
4.3/5
Overall performance
4.3/5
Appearance
4.2/5
Reviewed 5/11/25, United States.
The phone is in great condition. ONE tiny nick in a discreet spot, can't even notice! No scratches on screen or back . Definitely worth the money I spent. Phone works exactly how it suppose to. Another plus was fast shipping. I couldn't be happier.
Galaxy S21 Ultra 5G 256GB - Silver - Locked T-Mobile
Galaxy S21 Ultra 5G 256GB - Silver - Locked T-Mobile
Condition
Good
Purchased
4/28/25
Reviewed 8/17/23, United States.
I'm really happy with the phone, but the Asurian insurance plan is terrible. The screen on my phone cracked within 10 days so I filed a claim with Asurian. I entered all of the info into their system. They acknowledged my claim and asked me to fill in a pdf with all of the same info unless I already provided it. Apparently, they wanted me to provide it again and I only learned that after spending 45 minutes on the phone. They also asked for a copy of the product receipt and insurance receipt. They should have all of this on file. The latest request is for a picture of the front and back of the phone. I wonder what the next hoop is that they want me to jump through. It feels like they are making this difficult on purpose to prevent claims. Also, Back Market is not listed as a retailer with Asurian so it's impossible to get info from them on claim status.
Galaxy S21 Ultra 5G 256GB - Black - Locked T-Mobile
Galaxy S21 Ultra 5G 256GB - Black - Locked T-Mobile
Condition
Fair
Purchased
7/31/23
Reviewed 5/12/25, United States.
Phone said it was in good shape, I would say excellent
Galaxy S21 Ultra 5G 256GB - Silver - Locked T-Mobile
Galaxy S21 Ultra 5G 256GB - Silver - Locked T-Mobile
Condition
Good
Purchased
4/29/25
Reviewed 11/10/24, United States.
Very quick shipping. Product came as described.
Galaxy S21 Ultra 5G 256GB - Black - Locked T-Mobile
Galaxy S21 Ultra 5G 256GB - Black - Locked T-Mobile
Condition
Premium
Purchased
10/28/24
Reviewed 10/29/23, United States.
I purchased a phone advertised as excellent condition and it wasn't!! the top of the screen has a chip and right below it a scratch!!! The bottom of the phone buy speaker and charging port are chipped and scratched...I had no choice but to keep the phone because my previous phone was no longer working...I wasn't going to leave a review but I think you should know that it wasn't in excellent condition but phone is in good working condition everything works as it should...Thanks Nick
Galaxy S21 Ultra 5G 128GB - Black - Locked T-Mobile
Galaxy S21 Ultra 5G 128GB - Black - Locked T-Mobile
Condition
Excellent
Purchased
10/15/23
Reviewed 9/25/23, United States.
Phone is in terrible shape considering this is considered "good." It has several scratches on the screen. Some are so deep I can feel them with my fingernail. USB-C port looks to be in bad shape too. Didn't even try turning it on. Very disappointed.
Galaxy S21 Ultra 5G 128GB - Black - Locked T-Mobile
Galaxy S21 Ultra 5G 128GB - Black - Locked T-Mobile
Condition
Good
Purchased
9/21/23
Reviewed 9/3/23, United States.
In better than new condition
Galaxy S21 Ultra 5G 128GB - Black - Locked T-Mobile
Galaxy S21 Ultra 5G 128GB - Black - Locked T-Mobile
Condition
Excellent
Purchased
8/22/23
NoFoldable
Samsung Galaxy SSerie
40 megapixelsFront camera
0.77SAR head
Physical SIM + eSIMSIM card
Phantom TitaniumColor (official name)
SM-G998UManufacturer Ref.
1.02SAR body
AndroidOS
The Samsung Galaxy S21 Ultra 5G, released in January 2021, remains a powerful flagship device with a large, vibrant display and advanced camera system. Though it is now a few generations old, it still offers strong performance and versatile features suitable for demanding users.
Key features:The Galaxy S21 Ultra 5G is suited for users who need a large, high-quality display and a versatile camera setup capable of detailed photography and zoom. It works well for professionals, content creators, and tech enthusiasts who value performance and multimedia capabilities. Compared to later models like the Galaxy S22 Ultra, it remains competitive but lacks some of the newest software refinements and camera improvements.
Pros & Cons: Pros Cons Large and vibrant 6.8-inch AMOLED display with 120Hz refresh rate Heavier and bulkier than smaller flagship phones Versatile quad-camera system including 108MP main and dual telephoto lenses No microSD card slot for expandable storage 5G connectivity for fast network speeds Ships with Android 11, may require updates for latest featuresChoosing a refurbished Samsung Galaxy S21 Ultra 5G supports a more sustainable approach by extending the device’s lifecycle. Back Market ensures each pre-owned device undergoes comprehensive testing to meet quality standards and reliability. Learn more about our quality standards.




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