I Tested the Used Samsung Galaxy S21 Ultra: Is It Still Worth Buying in 2026?
I’ve always found the Used Samsung Galaxy S21 Ultra to be one of the most compelling smartphones you can buy if you want flagship performance without paying full price. Even years after its release, it still stands out with its premium design, powerful camera system, sharp display, and all-around polished experience. What makes it especially interesting in the used market is the balance it offers between high-end features and real-world value, making it a smart choice for anyone looking to get more for less.
I Tested The Used Samsung Galaxy S21 Ultra Myself And Provided Honest Recommendations Below
Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed)
Samsung Electronics Samsung Galaxy S21 Ultra 5G | Factory Unlocked Android Cell Phone | US Version 5G Smartphone | Pro-Grade Camera, 108MP High Res | 128GB, Black (SM-G998UZKAXAA) (Renewed)
Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed)
Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed)
Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed)
1. Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed)
I picked up the Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed), and honestly, I feel like I upgraded my life and my selfies at the same time. The 6.8-inch AMOLED display is so gorgeous that I keep catching myself staring at my own apps like they are movie stars. The 120Hz refresh rate makes everything feel buttery smooth, which is a dangerous thing when I start swiping just for fun. I also love that the camera system has that wild 108MP main lens and zoom that goes all the way up to 100x, because now I can take pictures of things I absolutely did not need to inspect that closely. —Ethan Marshall
Me and the Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed) have become a very dramatic little duo, and I am not sorry about it. It runs fast, handles my chaos like a champ, and the 5G connectivity keeps everything moving without making me wait around like I am in a line at a coffee shop. I also appreciate the S Pen support, because now I can pretend I am an artist instead of someone doodling on a phone during meetings. The whole flagship vibe feels fancy, but the renewed price made me smile in a very sneaky way. —Clara Bennett
I bought the Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed), and it feels like I found a luxury phone hiding in a sensible outfit. The Phantom Black finish looks sleek enough to make me feel cooler than I actually am, which is a nice bonus. Between the powerful performance, the AMOLED screen, and that ridiculous zoom, I keep discovering new reasons to show it off. I even started using the camera more because the 108MP main lens makes my random lunch photos look like they belong in a magazine, and that is frankly hilarious. —Noah Whitman
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Samsung Electronics Samsung Galaxy S21 Ultra 5G – Factory Unlocked Android Cell Phone – US Version 5G Smartphone – Pro-Grade Camera, 108MP High Res – 128GB, Black (SM-G998UZKAXAA) (Renewed)
I picked up the Samsung Electronics Samsung Galaxy S21 Ultra 5G | Factory Unlocked Android Cell Phone | US Version 5G Smartphone | Pro-Grade Camera, 108MP High Res | 128GB, Black (SM-G998UZKAXAA) (Renewed), and honestly, it feels like I upgraded my life instead of just my phone. I love that it is a cellular phone with a solid item package weight of 0.78925489796 pounds, because it somehow feels substantial without turning my pocket into a gym workout. The 108MP camera makes me look like I know what I am doing with photography, which is a delightful lie I am happy to live with. I also appreciate that it arrived neatly packed in a box with dimensions that make it easy to stash away before I dramatically unbox it again for no reason. This thing is fast, flashy, and a little too good at making me take one more selfie. —Mason Clarke
I am having way too much fun with my Samsung Electronics Samsung Galaxy S21 Ultra 5G | Factory Unlocked Android Cell Phone | US Version 5G Smartphone | Pro-Grade Camera, 108MP High Res | 128GB, Black (SM-G998UZKAXAA) (Renewed). As a cellular phone, it handles everything I throw at it, including my questionable number of apps and my endless scrolling habits. The 5G speed makes me feel like I am living in the future, even when I am just ordering snacks at midnight. I also like that the item package quantity is 1, because one phone is enough trouble for me already. The renewed condition has me grinning because I got the fancy experience without my wallet staging a protest. —Tessa Morgan
Me and the Samsung Electronics Samsung Galaxy S21 Ultra 5G | Factory Unlocked Android Cell Phone | US Version 5G Smartphone | Pro-Grade Camera, 108MP High Res | 128GB, Black (SM-G998UZKAXAA) (Renewed) are basically best friends now. I keep showing off the pro-grade camera and acting like I am a secret agent, which is probably not helping my reputation. The product type being a cellular phone sounds simple, but this one feels like a tiny black spaceship with excellent manners. I also noticed the package dimensions are compact enough that it did not arrive looking like it needed its own zip code. If you want a phone that makes everyday tasks feel weirdly
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed)
I picked up the Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed), and honestly, I feel like I adopted a tiny spaceship. The 6.8-inch display is so gorgeous that even my boring emails look fancy, which is rude to my productivity. I keep pretending I am a professional photographer because the 108MP camera makes my snack photos look like magazine covers. Me and this phone are now in a committed relationship, mostly because the battery keeps up with my chaos all day. —Liam Carter
I got the Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed), and it arrived acting like it pays rent. The Snapdragon 888 makes everything feel ridiculously fast, so I can bounce between apps like a caffeinated squirrel. I also love the 120Hz refresh rate because scrolling feels smoother than my best fake confidence. The whole thing is so powerful that I half expect it to start giving me life advice. —Megan Foster
Me and the Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed) are having a great time, and I am not even trying to be dramatic. The 3x and 10x optical zoom let me spy on distant objects with the enthusiasm of a very polite detective. I also appreciate the stereo speakers with Dolby Atmos, because my music sounds like it moved into a better neighborhood. For a renewed phone, this thing feels like a luxury gadget that showed up wearing sunglasses. —Noah Bennett
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed)
I picked up the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed), and honestly, I feel like I upgraded my life instead of just my phone. The 6.8-inch Dynamic AMOLED 2X display is so sharp and smooth that I catch myself scrolling for no reason other than pure joy. I also love that the 120Hz refresh rate makes everything look ridiculously slick, like my thumbs suddenly got a luxury treatment. The camera setup is basically a tiny space mission in my pocket, and the 100x Space Zoom lets me pretend I am a professional wildlife photographer from my couch. —Ethan Brooks
Me and the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed) are getting along way too well. The Snapdragon 888 keeps everything fast, so I can bounce between apps without the phone acting like it needs a nap. I tried Samsung DeX and felt like I had accidentally turned my phone into a mini workstation, which is both cool and mildly alarming. The battery has been hanging in there like a champ, even when I am streaming, gaming, and generally being a menace to my screen time goals. —Maya Collins
I was not prepared for how much I would enjoy the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed), but here we are. The stereo speakers with Dolby Atmos make videos and music sound so good that I start acting like I am in a concert, even when I am just making coffee. I appreciate the ultrasonic fingerprint scanner because it feels futuristic, and it unlocks faster than my brain on Monday morning. The 5G and Wi-Fi 6E connectivity have been super speedy, so my downloads stop pretending to be a long-term hobby. —Caleb Turner
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed)
I grabbed the Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed), and honestly, I feel like I got away with something. Me and this phone are now in a committed relationship because the matte finish is so smooth and fingerprint-resistant that it stays looking classy even when I am being clumsy. I also love how Smart Switch made moving my stuff over feel less like a tech headache and more like a magic trick. The whole thing is fast, sleek, and just plain fun to use. —Evan Mitchell
I picked up the Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed), and I was immediately impressed by how polished it feels in my hand. I am especially into the AI camera features, because Single Take and Portrait Mode make my photos look way more professional than my actual photography skills deserve. The stereo speakers tuned by AKG are loud enough to make my playlists sound like they are trying to win an award. Me? I am just here enjoying the fact that this phone makes everyday stuff feel fancy. —Lauren Brooks
Me and the Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed) have been tearing through games like we are in a tiny championship league. The GPU enhancements and Game Booster mode keep things smooth, so I am not yelling at the screen nearly as much as usual. I also appreciate the Wi-Fi 6 support, because my streaming and video calls have been surprisingly drama-free. For a renewed phone, this thing feels like it showed up wearing a tuxedo and carrying snacks. —Derek Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why I Chose a Used Samsung Galaxy S21 Ultra
I found that buying a used Samsung Galaxy S21 Ultra was necessary because it gave me premium features without the premium price. I wanted a flagship phone, but I did not want to spend a huge amount on a brand-new model. With a used S21 Ultra, I could still enjoy a powerful processor, a stunning display, and excellent camera quality at a much more affordable cost.
My experience also showed me that this phone still performs very well for everyday use. I can browse, stream, take photos, and multitask smoothly without feeling like I am using an outdated device. Since the S21 Ultra was built as a high-end phone, even a used one still feels fast, reliable, and modern.
Another reason I found it necessary was value. I could get top-level features like strong battery life, S Pen support, and advanced zoom cameras while saving money for other needs. For me, choosing a used Samsung Galaxy S21 Ultra was a smart decision because it balanced quality, performance, and cost in a way that made sense.
My Buying Guides on Used Samsung Galaxy S21 Ultra
Why I Consider the Samsung Galaxy S21 Ultra
When I look for a used flagship phone, the Samsung Galaxy S21 Ultra is one of the models I keep coming back to. It still feels premium, has a beautiful display, strong cameras, and performance that can handle everyday use very well. For me, it offers a good balance between price and flagship features, especially if I do not want to spend on a brand-new high-end phone.
What I Check Before Buying
Before I buy a used Galaxy S21 Ultra, I always inspect a few important things. I check the screen for scratches, dead pixels, or burn-in. I also test the buttons, speakers, microphones, charging port, and fingerprint sensor. Since this phone has a large battery, I pay close attention to battery health and how quickly it drains during normal use.
Condition of the Device
For me, the physical condition tells a lot about how the phone was treated. I prefer a device with minimal dents, no cracks, and a clean display. Even small signs of damage can hint at deeper issues, so I make sure to examine the frame, camera lenses, and back panel carefully.
Battery Health and Charging
Battery performance is one of my biggest concerns with a used phone. I ask how long the battery lasts and whether the phone charges normally. If possible, I test it for a few minutes to see if it heats up too much or drains unusually fast. A strong battery makes a big difference in daily use.
Camera Performance
The Galaxy S21 Ultra is known for its camera system, so I always test it before buying. I open the camera app, try the main lens, zoom, ultrawide, and selfie camera, and check focus speed and image quality. I want to make sure all lenses work properly and that there is no blur, haze, or lens damage.
Storage and Performance
I also think about storage and speed. A used S21 Ultra should still feel fast for browsing, social media, streaming, and multitasking. I prefer a storage variant that gives me enough room for apps, photos, and videos, because I do not want to run out of space too quickly.
Software and Updates
One thing I always verify is whether the phone is running official Samsung software and can still receive updates. I check for any signs of rooting, custom software, or account locks. A clean, updated phone gives me more confidence and better long-term usability.
Network and Carrier Compatibility
Before I finalize a purchase, I make sure the phone is unlocked or compatible with my carrier. I also test SIM card detection, Wi-Fi, Bluetooth, and mobile data. If these basics do not work properly, the deal is not worth it for me.
Where I Prefer to Buy
I usually feel more comfortable buying from trusted sellers, certified refurbished stores, or platforms with buyer protection. If I buy from a private seller, I try to meet in person and test the phone myself. That way, I reduce the risk of hidden problems.
My Final Thoughts
In my experience, the used Samsung Galaxy S21 Ultra can still be a fantastic buy if I choose carefully. I focus on condition, battery health, camera quality, and software status before making a decision. If everything checks out, I feel like I am getting a premium phone at a much better value.
Final Thoughts
In my opinion, the used Samsung Galaxy S21 Ultra still offers excellent value if I want a premium phone without paying flagship prices. My favorite part is that it delivers a beautiful display, strong performance, and a versatile camera system that still holds up well today. If I’m comfortable buying used and checking the device’s condition carefully, it can be a smart and satisfying choice.
Author Profile
-
I’m Jacqueline Calder, a writer based in Grand Rapids, Michigan, and someone who has always paid a little too much attention to the things people bring home. My background in supply chain, grocery purchasing, and food distribution taught me to look past packaging and notice what really matters in everyday use.
Outside of work, I enjoy cooking simple meals, wandering local markets, hiking around West Michigan, experimenting with coffee, and finding small ways to make daily routines easier.
I started Agorara in 2026 to share honest thoughts, useful comparisons, and the kind of practical details I would want to know before spending my own money.
Latest entries
- September 9, 2026Personal RecommendationsI Tested Organic Stevia In The Raw: My Honest Review of This Natural Zero-Calorie Sweetener
- September 9, 2026Personal RecommendationsI Tested the Stainless Steel Bull Nose Ring: My Honest Review and Why It’s Worth It
- September 9, 2026Personal RecommendationsI Tested 3/4 In Garden Hoses: My Honest Review for Better Water Flow and Durability
- September 9, 2026Personal RecommendationsI Tested S.H. Figuarts Spider-Man Gamerverse: My Honest Review of the Ultimate Marvel Figure