
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
SamsungBrand
Phantom TitaniumColor (official name)
YesLast OS Compatibility
T-MobileCarrier compatibility
Samsung Galaxy SSerie
NoMemory Card Slot
2021Release Year
AndroidOS
Dynamic AMOLED 2XScreen type
The Samsung Galaxy S21 Ultra 5G, released in January 2021, remains a strong contender in the premium smartphone category. Known for its expansive display and versatile camera system, this model offers robust performance suitable for a variety of users despite being over three years old.
Key features:The Galaxy S21 Ultra 5G is well-suited for professionals, content creators, and power users who need a large, high-resolution display and advanced camera capabilities. It is also a good choice for users who prioritize 5G connectivity and multitasking performance. Compared to newer models like the Galaxy S22 Ultra, it offers many flagship features but may lack some updated software enhancements and slightly improved camera processing.
Pros & Cons: Pros Cons Large and vibrant display with smooth 120Hz refresh rate. Heavier and bulkier compared to smaller flagship phones. Versatile quad-camera system with high-resolution main sensor and telephoto zoom. No microSD card slot for expandable storage. 5G connectivity for fast network speeds. Locked to T-Mobile network, limiting carrier flexibility.Choosing a refurbished Samsung Galaxy S21 Ultra 5G is an eco-conscious decision that extends the lifecycle of a high-quality device. Back Market’s refurbished phones undergo thorough testing and certification to meet strict quality standards. Learn more about our quality standards.




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