Galaxy S23 Ultra 512GB - Green - Unlocked

  • Galaxy S23 Ultra - Unlocked
1 - 5
  • Current
$1,379.99 new


before trade-in
Pay over Time.

Works with all carriers

Comes with

Good Karma
Charging cable

For you? Only the best.

Refurbished and sold by Maroon Mobile

Live on Back Market since 2019


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Galaxy S23 Ultra - Unlocked's customer reviews


44 verified reviews in the last 6 months.

  • A

    Armando M.


    Reviewed in the United States on August 20, 2023

    Galaxy S23 Ultra arrived in excellent condition and unlocked just as advertised. Was a bit disappointed for only receiving the charging cable and not the brick but was more than happy my new Galaxy S23 Ultra I purchased at Back Market.
    Galaxy S23 Ultra 512GB - Phantom Black - Unlocked

    Purchased on August 5, 2023

  • J

    Joshua M.


    Reviewed in the United States on August 13, 2023

    I have had the phone about a week now and it has worked flawlessly. I ordered excellent condition and the phone came in brand new condition. I haven't had any issues out of the phone and would order from Back Market again with no hesitation.
    Galaxy S23 Ultra 512GB - Red - Unlocked

    Purchased on July 28, 2023

  • M

    Mark K.


    Reviewed in the United States on May 29, 2023

    The phone is terrific! The camera is superb with 100x zoom. I came back to Android from Apple and have to relearn the system. The only downsides are that the Android has too much "social media" software installed from the factory and some apps have redundant and complicated maneuvering within the app. You have to click several places just to discard an item. Some apps only allow discarding one item at a time with no "select all" feature. This is very cumbersome but overall, I am very satisfied. The phone arrived in pristine condition and was easy to set up. Thank you Back Market!
    Galaxy S23 Ultra 512GB - Green - Unlocked

    Purchased on May 14, 2023

  • P

    Phoenix B.


    Reviewed in the United States on September 20, 2023

    I just got it, perfect condition seems clean runs pretty good so far. I am testing everything out but so far so good. I’m very satisfied. If anything turns out wrong with it, I will update it here for everyone to see. Only thing is it came with a charger and charger box, but the box was for a fast charger. That’s just a little thing it’s a small price to pay for getting $500 off and for helping take care of the environment.
    Galaxy S23 Ultra 512GB - Red - Unlocked

    Purchased on September 17, 2023

  • D

    Dennis O.


    Reviewed in the United States on September 6, 2023

    I was referred to Back Market by a friend but was still a little skeptical but after finally making my purchase, I'm extremely satisfied. Phone came in basically brand new condition with manufacturers protective tape still on it. I thought there would be a "catch" to the deal but I honestly can't pick on anything negative. Will surely be looking here first for any future phones and devices. Keep it up!
    Galaxy S23 Ultra 512GB - Green - Locked T-Mobile

    Purchased on August 17, 2023

  • R

    Ricardo M.


    Reviewed in the United States on August 30, 2023

    Purchased two in "Excellent Condition", unfortunately only one is. The other has marks all over top and bottom edges as well the rims around the cameras like it's been slid around on tables before. A fairly deep scratch in the center of the screen. Verified "Excellent Condition " was selected and ordered before leaving a review.
    Galaxy S23 Ultra 256GB - Black - Locked T-Mobile

    Purchased on August 25, 2023

  • G

    Greg R.


    Reviewed in the United States on August 13, 2023

    Love the phone no problems yet took some getting used to as I went from a Note 9 to this phone so I'm still learning where some things are as apposed to the Note 9 but love the phone so far great Camera also supper clear picture and the Battery lufe so far last a pretty good while without having to recharge
    Galaxy S23 Ultra 512GB - Phantom Black - Unlocked

    Purchased on July 30, 2023

See all 44 reviews

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 S23 Ultra 512GB - Green - Unlocked

  • Description
    S Series has a legacy of pushing the boundaries of what a smartphone can do. And with Galaxy S23 Ultra, we’re raising that bar again. Galaxy S23 Ultra is more than the next big step in mobile tech. With the crystal-clear camera resolution on a phone and stunning Night Mode powered by Nightography, you can share those big moments no matter the lighting. Plus, with the fastest Snapdragon processor yet, juggle high-intensity games, multiple apps or video calls with ease. Write, sketch, edit, create and share from anywhere with a built-in S Pen. And do all of the above on an incredibly large display built for gaming, streaming, creating and doing. Enhance your day-to-day with a device that’s anything but ordinary, and share the epic with Galaxy S23 Ultra.
    • Capture the night, even in low light

      Ready to own the night? Whether you’re headed to a concert or romantic night out, there’s no such thing as bad lighting with Night Mode. Galaxy S23 Ultra lets you capture epic content in any setting with stunning Nightography.

    • Capture scenes in stunning detail

      Create crystal-clear content worth sharing with Galaxy S23 Ultra 200MP camera. Whether you’re posting or printing, Galaxy S23 Ultra always does the moment justice.

    • Steady video. Incredibly easy.

      Capture incredibly smooth video during life’s most exciting moments. With Video Stabilization, you can easily record daytime outdoor adventures or those spur-of-the-moment dance parties at night.

    • Upgrade your Note pad

      Capture scribbles, strokes of genius and everything in between with the built-in S Pen. Writing your next short story or sketching on the go has never felt this easy.

    • Take out the S Pen. Take a pic.

      Capture epic selfies and beautiful photos with the click of your S Pen. Simply open up the camera app and click the button on the S Pen instead of the screen. Getting that great shot just got easier.

    • Our fastest mobile processor available

      Whether you’re working hard, playing hard or doing both at the same time, smoothly switch between apps with our fastest processor ever.

    • The power to stay on top of your game

      Power through a packed day or a long night of gaming without worrying about your phone dying. The robust 5,000mAh battery has been fine-tuned with a smarter processor that helps manage energy usage without slowing you down.¹

    • More storage. More memories.

      You’re good on storage space. With an impressive amount of storage, starting at 256GB, you can enjoy being behind the camera without the stress that comes with getting close to filling up your phone.

    • Watch anything in any light

      Watch your content comfortably as Adaptive Vision Booster helps your screen adapt to your environment. Whether out in direct sunlight or in bed with the lights off, the contrast on Galaxy S23 Ultra expansive screen still looks amazing.

    • Convenient collaboration

      Easily answer video calls and collaborate with the team while remote with Galaxy S23 Ultra and Google Meet.²

    • Love it? Share it.

      Send even your large files —whether it’s cute puppy videos or work documents —between your Galaxy S23 Ultra and any iOS or Android device. Quick Share helps minimize frustration when sharing the epic.³

    • Snap once. Capture a ton.

      Get the group together for one shot and capture a variety of candid moments. Simply tap, record and choose from multiple stills and videos.⁴

    • Capture memories in stunning 8K Video

      Capture memories in stunning detail with 8K Video recording. No matter the moment, Galaxy S23 Ultra lets you shoot ultra-bright, crystal-clear scenes —day or night.

    • Get back to on the go

      Life’s best moments could happen at any second. With a battery that supports up to 45W Super-Fast Charging, it’s easy to stay ready. Power up your Galaxy S23 Ultra quickly and get back to making more memories.⁵

    • Tough when it matters most

      Take on the day confidently with a tough yet stylish phone —one built to resist spills and scratches.

    • Your phone. Your look. Your style.

      Design your own Galaxy experience with Galaxy S23 Ultra. With our versatile One UI, you can personalize a lock screen that reflects your lifestyle.

    • Designed with our planet in mind

      Feel good knowing your new phone supports what you support. Galaxy S23 Ultra was designed to help you live in a more sustainable world, while enjoying everything that makes that life amazing.

    • Smart Switch into the Galaxy

      Diving right into your new Galaxy S23 Ultra is easy. Simply transfer your favorite content —photos, calendar dates, alarms and even call history —from your previous phone with Smart Switch.

    • ¹Based on average battery life under typical usage conditions. Average expected performance based on typical use. Actual battery life depends on factors such as network, features selected, frequency of calls, and voice, data, and other application usage patterns. Results may vary.

    • ²Requires devices to have One UI 2.5 or later. Must be logged into the same Google account and Google Meet app must be activated on each device.

    • ³For Galaxy-to-Galaxy or any other devices: Quick Share to Galaxy smartphones and tablets smartphones and tablets with Android OS version 10.0 (Q) and One UI 2.1 or above requires Wi-Fi and Bluetooth connection.

    • ³Quick Share to iOS and Android devices available by sending shared link: individual files shared cannot exceed 3GB (for a total of 5GB per day) and link will expire after two days; requires a Samsung account and Internet connection.

    • ³For Galaxy-to-Galaxy device: Quick Share between Galaxy smartphones and tablets with Android OS version 10.0 (Q) and One UI 2.1 or above requires Wi-Fi and Bluetooth connection.

    • ⁴Single Take captures images and video for up to 15 seconds.

    • ⁵Wall charger sold separately; use only Samsung-approved chargers and cables. To avoid injury or damage to your device, do not use incompatible, worn or damaged batteries, chargers or cables. Supports up to 45W charging.

Galaxy S23 Ultra 512GB - Green - Unlocked

  • Manufacturing part numbers (MPN) : SM-S918UZGFXAA
  • Screen size (inches) : 6.8
  • Carrier compatibility : Unlocked
  • Storage : 512 GB
  • Memory : 12 GB
  • Model : Galaxy S23 Ultra
  • eSIM : No
  • Processor brand : Snapdragon
  • Megapixels : 200
  • OS : Android
  • Resolution : 1440x3088
  • Foldable : No
  • Screen type : AMOLED
  • Connector : USB-C
  • Network : GSM/CDMA + 5G
  • Release Date : February 2023
  • Double SIM : No
  • Manufacturer Ref. : SM-S918UZGFXAA
  • SAR head : 1.18
  • Series : Galaxy S
  • Color : Green
  • SIM card : Single-SIM + eSIM
  • Verizon compatible : Yes
  • AT&T compatible : Yes
  • T-Mobile compatible : Yes
  • Release Year : 2023
  • SIM format : Micro
  • Memory Card Slot : No
  • Series : Galaxy S
  • Brand : Samsung
  • Weight : 8 oz
  • Height : 6.4 in
  • Width : 3.1 in
  • Depth : 0.4 in

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