Galaxy S23 Ultra • UnlockedBlack • 256 GB • Physical SIM + eSIM

(730 reviews)

$515.03

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Customer reviews for Galaxy S23 Ultra • Unlocked

Overall rating

730 verified reviews

Rating details

Accessories
4.1/5
Appearance
4.3/5
Battery
4.3/5
Lens & Camera
4.5/5
Overall performance
4.3/5
Packaging
4.4/5
Shipping
4.5/5

Reviews

Noah G.
Verified purchase
Reviewed 1/4/26, United States.
This is the first phone I've purchased for myself, and I have to say it does not dissappoint. It is a major upgrade from a Samsung Galaxy s8 and checks all the boxes in what I wanted in a new phone. Great camera quality, more storage, responsive and larger screen. Best part was I didn't have to spend over 1k to own it. 10/10 would purchase from Back Market again.
Galaxy S23 Ultra 512GB - Green - Unlocked
Galaxy S23 Ultra 512GB - Green - Unlocked
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
12/21/25
Francisco M.
Verified purchase
Reviewed 5/17/26, United States.
My S23 ultra came to Venezuela two days ago, honestly it didn't came in fair state..... think it's really in amazing state, almost brand new one, just a few scratchs, but everything work totally perfect. The package also came with a data cable usb-C and a pretty silicon case with the logo of the lab (Cellfee). I wasn't expecting get it with the Spen, but there was, inside of the Phone and totally functional. And also the Phone came with a screen protector. I highly recommend the seller, was the first device that i buy here in Backmarket, and Cellfee make it perfect.
Galaxy S23 Ultra 256GB - Black - Unlocked
Galaxy S23 Ultra 256GB - Black - Unlocked
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
5/3/26
William L.
Verified purchase
Reviewed 1/12/26, United States.
received it in 2 days and let me tell you. it looked and operates like a brand new one above and beyond what I thought it would be highly recommend the picture of the moon was taken with this phone
Galaxy S23 Ultra 256GB - Green - Unlocked
Galaxy S23 Ultra 256GB - Green - Unlocked
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
12/29/25
Carol R.
Verified purchase
Reviewed 1/11/26, United States.
This is my second time to get a phone from Back Market. Initially I got a Galaxy Note 10. Yes if was old, I used it over 10 years. It was a great phone. Just like new. This time I got a Galaxy S23 Ultra. Again, just like new. No problem connecting to network or transferring data from my ancient phone! I love the phone; yet I am so far behind on the technological leap from a 10 to a 23! I highly recommend purchasing a phone from Back Market. It is much less expensive than buying new and it helps the planet to recycle this tech. I've never had an issue to resolve with Back Market. Things have always been as Back Market said they would be. I tried to get a refurbished phone from AT&T. If was clear that they had not checked all the points that they claimed to check. Back Market does the job right!
Galaxy S23 Ultra 256GB - Black - Unlocked
Galaxy S23 Ultra 256GB - Black - Unlocked
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
12/15/25
Eric O.
Verified purchase
Reviewed 11/20/25, United States.
I just received my Galaxy s23 ultra today (fair condition), and all I can say is that I'm amazed with the quality! I don't have much money to spend , so I was kind of hesitant to buy refurbished, but back market definitely changed my mind! I will always continue to support this amazing company, and it's sellers .
Galaxy S23 Ultra 512GB - Green - Unlocked
Galaxy S23 Ultra 512GB - Green - Unlocked
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
11/17/25
Rose R.
Verified purchase
Reviewed 5/27/26, United States.
So far, it's been great. The phone looked flawless and it was very well packaged, it really does look brand new. It runs smooth and I have not seen any problems as of today.
Galaxy S23 Ultra 256GB - Black - Unlocked
Galaxy S23 Ultra 256GB - Black - Unlocked
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
5/11/26
Justin S.
Verified purchase
Reviewed 4/12/26, United States.
showed up looking better than expected. everything loads up much, much faster. the battery lasting is to be desired but from a refurbished device without ordering new battery it's pretty great. not sure why it won't hold the update I've been trying to install since getting it, but im happy
Galaxy S23 Ultra 256GB - Red - Unlocked
Galaxy S23 Ultra 256GB - Red - Unlocked
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
3/28/26

Everything you ever wanted to know about the Galaxy S23 Ultra • Unlocked

SM-S918UZKEXAA-CMPN
1440x3088Resolution
6.8Screen size (inches)
12 GBMemory (GB)
2023Release Year
256 GBStorage
SM‑S918UManufacturer Ref.
BlackColor
Samsung Galaxy SSerie

Experience the cutting-edge with the Samsung S23 Ultra smartphone in Phantom Black. This unlocked Android 13 device features a massive 6.8-inch display, 12GB of RAM, and a powerful 200MP rear camera for stunning photos. With 5G connectivity and ample 256GB storage, this phone is designed for the future.

Features

6.8-inch 1440 x 3088 Display
256GB Storage Size
200MP Rear Camera
Cellular Connectivity: 5G Fully Unlocked
Operating System: Android 13
6.43" x 3.07" x 0.35" (HxWxD); 0.4lbs

What's in the box

Samsung Galaxy S23 Ultra 256GB Phantom Black Unlocked
USB Cable

Specifications
General Information
Model Number: S23 Ultra
Storage Size (GB): 256
Dual Sim: Single-SIM + eSIM
Lithium Battery Weight (oz): 2
# of Battery Cells: 1
Total RAM (GB): 12
Manufacturer Reference No.: SM‑S918U
Product Line (Phone): Galaxy
Mobile Operating System: Android 13
Battery Capacity (mAh): 5000
Rechargeable Battery Type: Lithium-Ion

Networking
Cellular Status: Unlocked
Network Provider: Not Applicable
Cellular Network: Not Applicable
Wireless Technology: 5G

Physical Features
Item Dimensions - H x W x D (IN): 6.43 x 3.07 x 0.35
Color - Exact: Phantom Black
Item Weight (LBS): 0.4
Color - Generic: Black

Display
Native Resolution - W x H (Pixels): 1440 x 3088
Screen Size (IN): 6.8

Camera
Rear Camera Megapixels: 200

MPN: SM-S918UZKEXAA-C
Resolution: 1440x3088
Screen size (inches): 6.8
Memory (GB): 12 GB
Release Year: 2023
Storage: 256 GB
Manufacturer Ref.: SM‑S918U
Color: Black
Serie: Samsung Galaxy S
SAR head: 1.12
Memory Card Slot: No
Network: 5G
Carrier compatibility: Unlocked
Brand: Samsung
Color (official name): Phantom black
Model: Galaxy S23 Ultra
Foldable: No
Connector: USB-C
OS: Android
SIM card: Physical SIM + eSIM
Screen type: Dynamic AMOLED 2X
Weight: 8 oz

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Galaxy S23 Ultra • UnlockedBlack • 256 GB • Physical SIM + eSIM

Galaxy S23 Ultra • UnlockedBlack • 256 GB • Physical SIM + eSIM

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Customer reviews for Galaxy S23 Ultra • Unlocked

Overall rating

Rating details

Reviews

Reviews

Noah G.

Francisco M.

William L.

Carol R.

Eric O.

Rose R.

Justin S.

Popular searches

Everything you ever wanted to know about the Galaxy S23 Ultra • Unlocked

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