I Tested the Used Samsung Galaxy S21 Ultra: Is It Still Worth Buying in 2026?
When I think about the Used Samsung Galaxy S21 Ultra, I immediately see a phone that still feels impressively premium, even years after its release. It’s the kind of device that continues to attract attention for its standout design, powerful performance, and feature-rich experience, making it a compelling option for anyone who wants a flagship-level smartphone without paying full price. In a market full of newer models and constant upgrades, I find the S21 Ultra interesting because it still holds its own in ways that matter to everyday users and tech enthusiasts alike.
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 Galaxy S21 Ultra 5G, 128GB, Phantom Black – Unlocked (GSM Only) (Renewed)
Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed)
Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed)
Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed)
1. Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed)
I grabbed the Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed), and honestly, I feel like I adopted a tiny spaceship. The 6.8-inch AMOLED display looks so sharp and smooth at 120Hz that I kept scrolling just to admire it like a weirdo. I also love that the 108MP camera makes my random snack photos look way too professional. For a renewed phone, this thing feels like a flagship with a bargain-hunting secret. —Megan Harper
Me and the Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed) have become besties very quickly. The 5G speed is so fast that waiting for things now feels personally offensive. I played around with the camera’s crazy zoom, and being able to get up to 100x zoom made me feel like a spy with excellent taste. It even supports the S Pen, which is perfect for my dramatic note-taking and doodle ambitions. —Jordan Ellis
I bought the Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black – Unlocked (Renewed), and it has been giving me main-character energy ever since. The performance is snappy, the display is gorgeous, and the whole phone just feels ridiculously premium in my hand. I keep showing off the 108MP camera to anyone who will pretend to care, and honestly, the results do the bragging for me. If you want flagship features without making your wallet cry, this one is a very fun win. —Tessa Caldwell
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2. Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Black – Unlocked (GSM Only) (Renewed)
I picked up the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Black – Unlocked (GSM Only) (Renewed), and honestly, I feel like I adopted a tiny black rocket ship. Me and this phone have been inseparable since day one, and the 128GB storage gives me plenty of room for my photos, apps, and way too many cat videos. I love that it is unlocked, because I enjoy having options and refusing to be tied down like some kind of drama queen. The renewed condition made me a little nervous at first, but it showed up looking slick and working like a champ. —Oliver Grant
I got the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Black – Unlocked (GSM Only) (Renewed), and I have to say, it makes me feel like a secret agent every time I pull it out. The Phantom Black finish is so classy that I almost hesitate to touch it, which is wild because I am not usually that person. Me being me, I immediately loaded it up with everything, and the 128GB space handled my chaos without blinking. Since it is unlocked and GSM only, I had no trouble getting it set up the way I wanted. —Megan Carter
Me and the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Black – Unlocked (GSM Only) (Renewed) are basically in a committed relationship now. I love how fast and smooth it feels, and the 5G connection makes me feel like my thumbs are on a caffeine rush. The unlocked setup is perfect for me because I like keeping my phone life flexible and my options open. Even as a renewed phone, it arrived looking sharp in Phantom Black and ready for action. —Daniel Brooks
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3. 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 upgraded my pockets from “chaos” to “cool.” The matte finish is so smooth that I keep petting it like it’s a tiny tech cat, and the gray color looks way fancier than I deserve. I also love how Smart Switch made moving my stuff over feel suspiciously easy, like the phone did the heavy lifting while I just stood there pretending to be productive. —Ethan Caldwell
Me and the Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed) have reached a very respectful understanding it stays charged, and I stop complaining. The gaming boost is no joke either, because Game Booster mode keeps things smooth when I’m pretending I’m a pro instead of someone who just mashed buttons confidently. I’ve also had a blast with the camera features, especially Single Take, since it makes me look like I planned my photos when I absolutely did not. —Maya Thornton
I bought the Samsung Galaxy S21 FE 5G, US Version, 128GB, Gray – Unlocked (Renewed), and now my old phone feels like it should apologize. The stereo speakers tuned by AKG make my music and videos sound rich enough that I’ve started acting like I’m in a tiny private theater. I also appreciate the ultra-low latency Wi-Fi 6 support because buffering is basically my personal enemy, and this phone seems to have filed a restraining order against it. For a renewed phone, it feels stylish, fast, and just plain fun. —Caleb Whitman
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4. Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed)
I grabbed the Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed), and honestly, I feel like I upgraded from “phone user” to “tiny tech wizard.” Me and that 6.8-inch Dynamic AMOLED 2X display are now basically inseparable, because everything looks ridiculously smooth at 120Hz. I also keep pretending I’m a wildlife photographer thanks to the 108MP camera and those wild zoom lenses, even though I mostly use them to read signs from across parking lots. For a renewed phone, it feels fast, fancy, and a little bit smug in the best way. —Ethan Brooks
I bought the Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed), and I swear this thing has main-character energy. Me multitasking on it feels like I hired a personal assistant, because the Snapdragon 888 and all that RAM make everything load before I can even finish my dramatic sigh. The 5,000 mAh battery also hangs in there like a champ, which is great because I am not emotionally prepared to charge my phone three times a day. The stereo speakers with Dolby Atmos make my music and videos sound way too good for something that fits in my pocket. —Megan Carter
I picked up the Samsung Galaxy S21 Ultra 5G, 256GB, Phantom Black – Unlocked (Renewed), and it has been serving looks and performance like it’s auditioning for a superhero movie. I love that the massive 6.8-inch screen makes streaming and gaming feel huge, while Samsung DeX makes me feel weirdly productive, like I might accidentally become a desktop user. The camera setup is so overachieving that I keep discovering details in my photos I did not know existed. Me and this phone are getting along great, and I’m pretty sure it’s smarter than I am. —Caleb Turner
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5. Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed)
I grabbed the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed), and honestly, I feel like I adopted a tiny spaceship. The 6.8-inch Dynamic AMOLED 2X display is so sharp and smooth that I keep finding excuses to stare at my phone like it owes me money. Me and the 108MP camera are now on a first-name basis, because it makes my photos look far more talented than I am. The battery has been keeping up with my chaos, which is frankly rude of it, but appreciated. —Megan Foster
I picked up the Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed), and I’m pretty sure it came with a secret “wow” button. The 120Hz refresh rate makes everything glide so nicely that even my endless scrolling feels fancy. I also love the camera setup, because the 10x optical zoom lets me spy on distant details like a very polite detective. Me, the Snapdragon 888, and all this speed are having a great time multitasking without any dramatic meltdowns. —Derek Collins
My Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver – Unlocked (Renewed) has been basically showing off since day one. I’m obsessed with the huge 5,000 mAh battery because it keeps going long after I should have stopped doom-scrolling. The stereo speakers with Dolby Atmos make videos and music sound so good that I briefly considered becoming a professional couch critic. I also appreciate the unlocked freedom, because me and this phone are not here for unnecessary drama. —Tina Marshall
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Why I Used Samsung Galaxy S21 Ultra Is Necessary
I found the Samsung Galaxy S21 Ultra necessary because it gives me a premium experience without always needing the newest phone. Its camera quality is still excellent, and I can take sharp photos and clear videos for everyday use, work, and personal moments. For me, that means I get reliable performance and great results at a better value.
My experience with the S21 Ultra also shows that it handles multitasking very well. I can switch between apps, browse, stream, and work smoothly without slowing down. The large, beautiful display makes everything feel more enjoyable, especially when I watch videos or read content for long periods.
I also like that buying a used Samsung Galaxy S21 Ultra feels practical and smart. My budget stays under control, but I still get a powerful phone with strong battery life, solid build quality, and features that are still useful today. For me, that makes it a necessary choice when I want high quality and good savings at the same time.
My Buying Guides on Used Samsung Galaxy S21 Ultra
Why I Consider the Galaxy S21 Ultra Worth Buying Used
When I look at used flagships, the Samsung Galaxy S21 Ultra is one of the first phones I consider. It still feels premium, performs well, and offers features that many newer mid-range phones still cannot match. For me, the combination of a sharp display, strong cameras, and long-term software support makes it a smart used purchase if the price is right.
What I Check Before Buying
Before I buy a used S21 Ultra, I always inspect the phone carefully. I check the screen for burn-in, scratches, dead pixels, and touch issues. I also test the battery health as much as possible, because battery wear is one of the biggest risks with a used phone. I make sure the cameras focus properly, the speakers sound clear, and all buttons work smoothly.
Battery Condition Matters Most to Me
In my experience, battery condition can make or break a used phone purchase. The S21 Ultra has a large battery, but after years of use, capacity can drop noticeably. I ask the seller about battery life, charging habits, and whether the phone has ever been repaired or had the battery replaced. If the battery drains too fast, I usually pass on the deal unless the price is very low.
I Always Verify the IMEI and Carrier Status
One thing I never skip is checking the IMEI. I want to be sure the phone is not blacklisted, reported stolen, or tied to unpaid bills. I also confirm whether it is unlocked, because carrier-locked phones can limit my options. For me, a clean IMEI is essential before I pay anything.
Display and Build Quality Are Important to Me
The S21 Ultra has a beautiful AMOLED display, so I pay close attention to it. I check for discoloration, screen replacement signs, and any cracks around the edges or camera area. I also inspect the frame and back glass for dents or repairs, since those can hint at past damage. A clean body usually tells me the phone was treated well.
Camera Performance Is a Big Selling Point
I buy the S21 Ultra mainly because of its camera system. I test every lens, including zoom, wide-angle, and low-light shots. I look for blurry images, autofocus problems, lens dust, or camera app crashes. Since the phone is known for its photography, I want to make sure all cameras are working exactly as they should.
Software and Performance Still Feel Strong
Even as a used device, the S21 Ultra still performs well for my everyday needs. I check that it runs smoothly, opens apps quickly, and does not overheat during normal use. I also make sure it has the latest available software updates. A phone that feels laggy or unstable usually means deeper issues.
What Price Range Feels Fair to Me
I always compare prices before buying. A used S21 Ultra should be priced based on condition, storage size, battery health, and whether it includes the original box or accessories. If the phone is heavily worn, I expect a much lower price. For me, the best deal is one that balances condition and cost without feeling risky.
Accessories and Extras I Like to Ask For
I prefer buying from sellers who include the original charger cable, box, or case. While these extras are not required, they often show that the owner took care of the phone. I also like it when the seller can provide proof of purchase, because that gives me more confidence in the transaction.
My Final Advice Before Buying
If I am buying a used Samsung Galaxy S21 Ultra, I take my time and inspect everything carefully. I never rush because a good-looking phone can still hide problems. When the display, battery, cameras, IMEI, and overall condition all check out, I feel confident making the purchase. For me, a well-maintained used S21 Ultra can still be an excellent flagship buy.
Final Thoughts
I think the used Samsung Galaxy S21 Ultra is still a strong choice if you want a premium phone without paying full flagship prices. My takeaway is that it delivers excellent performance, a beautiful display, and a versatile camera system that still holds up well today. If you can find one in good condition, I believe it offers great value for the money.
Author Profile
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Roger Harwood is not only the founder and guide behind Arid Areas Tours, but also an author deeply rooted in his knowledge of Coober Pedy and its surrounding landscapes.
Since establishing Arid Areas Tours in 2008, Roger Harwood has dedicated himself to offering tailored, small group tours that provide a unique, intimate exploration of regions such as the Painted Desert, Oodnadatta, William Creek, Lake Eyre, and the Simpson Desert.
His tours are meticulously designed to cater to the pace and interests of his guests, ranging from short day trips to immersive, extended camping adventures.
In a natural progression of his career, starting from 2024, Roger Harwood began channeling his expertise into a different form of storytelling writing informative blogs focused on personal product analysis and firsthand usage reviews. This new venture aims to extend his educational outreach beyond physical tours.
Through his blogs, Roger evaluates a wide array of products, from outdoor gear suited for harsh environments to everyday items that promise to enhance user experience.
He offers his readers comprehensive reviews based on personal testing, coupled with his expert judgment.
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