
United States
English (US)

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
See itemCondition
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
See itemCondition
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
See itemCondition
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
See itemCondition
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
See itemCondition
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
See itemCondition
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
See itemCondition
Excellent
Purchased
8/22/23
8 ozWeight
SM-G998UManufacturer Ref.
T-MobileCarrier compatibility
NoFoldable
NoMemory Card Slot
6.8Screen size (inches)
5GNetwork
AndroidOS
108 megapixelsMain camera
The Samsung Galaxy S21 Ultra 5G is a flagship smartphone released in early 2021, known for its advanced camera system and large, vibrant display. Despite being a few generations old, it still offers strong performance suitable for demanding tasks and multimedia consumption.
Key features:The Galaxy S21 Ultra 5G is well suited for professionals, photographers, and tech enthusiasts who require a high-performance smartphone with versatile camera capabilities and a large, high-quality display. It is a solid choice for users who want flagship features without the newest model’s incremental updates.
Pros & Cons: Pros Cons High-resolution, vibrant display with smooth 120Hz refresh rate. Large size and weight may not suit users preferring compact phones. Versatile quad-camera system with strong zoom capabilities. No microSD card slot for expandable storage. 5G connectivity for future-proof network performance. Locked to T-Mobile network, limiting carrier flexibility.Choosing a refurbished Samsung Galaxy S21 Ultra 5G supports a more sustainable approach by extending the device’s lifecycle. Each pre-owned device from Back Market undergoes thorough testing and quality checks to ensure reliable performance. Learn more about our quality standards.




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