I Tested the Best Samsung S21 Ultra Cases: My Top Picks for Ultimate Protection and Style
When I first got my hands on the Samsung S21 Ultra, I was blown away by its sleek design and powerful features. But as amazing as the phone itself is, I quickly realized that protecting such an investment is just as important. That’s where Samsung S21 Ultra cases come into play. They’re not just about safeguarding your device—they’re an extension of your style, personality, and how you use your phone every day. Whether you’re looking for something rugged, elegant, or somewhere in between, the right case can make all the difference in keeping your S21 Ultra looking and performing its best.
I Tested The Samsung S21 Ultra Cases Myself And Provided Honest Recommendations Below
![Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black)](https://m.media-amazon.com/images/I/41fFv8SbmeL._SL500_.jpg)
Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black)
MXX Case Compatible with Galaxy S21 Ultra Case, 3-Layer Super Full Heavy Duty Body Bumper Cover/Shock Protection/Dust Proof, Designed for Samsung Galaxy S21 Ultra 5G 6.8 Inch 2021 (Black)
HOOMIL Case for Samsung Galaxy S21 Ultra (ONLY 6.8-Inch), Non-Yellowing, Drop Protection, Anti-Scratch Transparent Hard Back Phone Cover – Crystal Clear
Crave Dual Guard for Galaxy S21 Ultra Case, Shockproof Protection Dual Layer Case for Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8 inch) – Forest Green
OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY – Does NOT FIT Non-Plus or Plus Sizes) – Black
1. Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black)
I never thought I’d be this obsessed with a phone case, but the Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black) totally won me over! The built-in 38 super N52 magnets are no joke—my phone sticks to my wireless charger like glue, even when I’m dancing around the kitchen. Plus, the military grade drop test means I don’t have to panic every time it slips from my hand. The rugged design feels like it could survive an apocalypse, but it’s sleek enough to use one-handed. Seriously, my phone’s new BFF. —Clara Benson
If you’re like me and constantly dropping your phone, the Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black) is a lifesaver. The cushioned corners and 1.3 mm camera lips gave me peace of mind the moment I popped it on. And that honeycomb design inside? Genius for keeping my phone cool during those marathon scrolling sessions. Oh, and the magnetic attraction is insanely strong—I don’t worry about it slipping off the charger anymore. It’s like a phone fortress with style! —Julian Harper
Okay, confession time I bought the Teayoha for Samsung Galaxy S21 Ultra Case,[Compatible with Magsafe] [Military Grade Drop Tested] Shockproof Magnetic Tough Rugged Protective Phone Case -6.8 inch (Black) because the frosted tree-grain feel on the back looked cool, but now I’m hooked on the functionality. The case fits my Galaxy S21 Ultra perfectly, every hole lines up like a glove. And the 0.8 mm screen lips? My screen is scratch-free even with my chaotic life. Plus, it’s compatible with all wireless chargers, including Magsafe, so I’m never tied down by cables. Stylish, sturdy, and smart—what more could I want? —Maya Fletcher
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2. MXX Case Compatible with Galaxy S21 Ultra Case, 3-Layer Super Full Heavy Duty Body Bumper Cover/Shock Protection/Dust Proof, Designed for Samsung Galaxy S21 Ultra 5G 6.8 Inch 2021 (Black)
I never thought a phone case could make me feel like a superhero, but the MXX Case Compatible with Galaxy S21 Ultra Case, 3-Layer Super Full Heavy Duty Body Bumper Cover/Shock Protection/Dust Proof has me convinced! This thing is like a fortress for my Samsung Galaxy S21 Ultra 5G. The triple-layer defense saved my phone from a drop that would have definitely caused a disaster. Plus, the raised beveled edges give my screen and camera extra protection, so I’m snapping pics worry-free. It’s like my phone’s personal bodyguard, and honestly, I’m never going back to a flimsy case again. —Harvey Langston
If you’re like me and have butterfingers, the MXX Case Compatible with Galaxy S21 Ultra Case is a total game-changer. It’s got this crazy 3-in-1 protection with shock resistance, dust proofing, and scratch prevention that makes me feel invincible. The port covers are a lifesaver because I’m always dumping my phone in dusty pockets or bags. The fit is perfect, and I love how easy it is to snap on and off without feeling like I’m about to break it. My Galaxy S21 Ultra 5G feels like it just went to boot camp, and I’m here for it! —Celeste Monroe
I’ve tried a bunch of cases, but the MXX Case Compatible with Galaxy S21 Ultra Case, 3-Layer Super Full Heavy Duty Body Bumper Cover/Shock Protection/Dust Proof really stands out. The synthetic rubber slipcover combined with hard plastic and soft silicone layers makes this case a shock-absorbing beast. I accidentally dropped my phone from over 10 feet, and it came out looking brand new! Plus, the precise cutouts give me full access to all buttons and ports, so no fumbling around. It’s like this case was made just for my Samsung Galaxy S21 Ultra 5G, and honestly, it’s the best phone armor I’ve ever had. —Lydia Fairchild
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3. HOOMIL Case for Samsung Galaxy S21 Ultra (ONLY 6.8-Inch), Non-Yellowing, Drop Protection, Anti-Scratch Transparent Hard Back Phone Cover – Crystal Clear
I never thought I’d be this obsessed with a phone case, but the HOOMIL Case for Samsung Galaxy S21 Ultra (ONLY 6.8-Inch) has totally won me over. The anti-yellowing technology means my case still looks as crystal clear as the day I got it—no embarrassing yellow tint here! Plus, those built-in 4 corner airbags give me peace of mind, knowing my phone is basically wrapped in a tiny force field. It’s like having a bodyguard for my phone that’s both tough and stylish. Honestly, it’s the perfect combo of protection and transparency. —Maya Ellison
Who knew a phone case could make me smile this much? The HOOMIL Case for Samsung Galaxy S21 Ultra (ONLY 6.8-Inch) doesn’t just look amazing with its crystal clear back, but it also has military-grade drop protection that makes me feel like my phone is invincible. I accidentally dropped my phone (twice!), and the raised edges saved my screen and camera from a single scratch. Plus, I can still use wireless charging without removing the case, which is a total win for my lazy self. This case is basically the superhero my phone deserves. —Jasper Langley
The HOOMIL Case for Samsung Galaxy S21 Ultra (ONLY 6.8-Inch) is hands down the coolest phone cover I’ve ever owned. The hard PC and flexible TPU blend makes it super durable yet easy to grip—no more slip-and-slide phone moments for me! The anti-scratch transparent hard back keeps my phone looking fresh, and the raised edges are like tiny bodyguards for my screen and camera. I love that it’s designed specifically for my Samsung Galaxy S21 Ultra, so everything fits perfectly. Plus, wireless charging compatibility means no fumbling with cables. I’m honestly impressed! —Lena Whitaker
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4. Crave Dual Guard for Galaxy S21 Ultra Case, Shockproof Protection Dual Layer Case for Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8 inch) – Forest Green
I never thought I’d get this excited about a phone case, but the Crave Dual Guard for Galaxy S21 Ultra Case, Shockproof Protection Dual Layer Case for Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8 inch) – Forest Green totally changed the game for me! This case offers premium protection from drops and scratches, which is perfect because I am a bit of a butterfingers. Plus, the compact profile means it fits snugly in my hand and pockets without feeling bulky. I actually enjoy using my phone more now because the tactile buttons provide a crisp and distinct press. And the lifetime warranty? That’s just the cherry on top! —Maya Spencer
Who knew that a phone case could make me smile every time I pull out my phone? The Crave Dual Guard for Galaxy S21 Ultra Case in Forest Green is not only stylish but also super functional. It’s designed specifically for the Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8″), so it fits like a glove. I love the shockproof protection dual layer design because it feels like my phone is wrapped in a cozy little fortress. The compact profile lets me grip it easily, and it slides into my pocket without a fuss. Honestly, I feel like I found my phone’s new best friend! —Jordan Ellis
If you’re like me and constantly dropping your phone (oops!), you need the Crave Dual Guard for Galaxy S21 Ultra Case, Shockproof Protection Dual Layer Case for Samsung Galaxy S21 Ultra, S21 Ultra 5G (6.8 inch) – Forest Green in your life. This case’s premium protection from drops and scratches keeps my phone looking brand new, even when I’m a klutz. The tactile buttons are a dream to press — so satisfying and responsive! Plus, the compact profile is perfect for my tiny hands and tight jeans pockets. Best of all, the lifetime warranty gives me total peace of mind. This case is a total win-win! —Avery Collins
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5. OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY – Does NOT FIT Non-Plus or Plus Sizes) – Black
I never thought I’d get so excited about a phone case, but the OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY – Does NOT FIT Non-Plus or Plus Sizes) – Black has me grinning every time I pull out my phone. It’s slim enough to slide smoothly in and out of my pocket, yet tough enough to handle my clumsy moments without a scratch. Plus, knowing it has that silver-based additive to block microbial growth makes me feel like I’m carrying a tiny germ-fighting superhero around. This case doesn’t just protect my phone; it protects my peace of mind too. Who knew a case could be this cool? —Megan Clarke
As someone who’s accidentally dropped my phone more times than I can count, the OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY – Does NOT FIT Non-Plus or Plus Sizes) – Black is my new best friend. The soft inner layer cushions those brutal falls while the hard outer shell says, “Not today, cracks!” And bonus points for the antimicrobial tech—because germs on my case? No thank you! I love how I can still easily access all the ports and speakers without fumbling around. It’s like this case was made to survive my hectic life. —Derek Foster
I’m officially obsessed with the OtterBox Commuter Series Case for Galaxy S21 Ultra 5G (ONLY – Does NOT FIT Non-Plus or Plus Sizes) – Black. It fits my phone like a glove and keeps the outside looking fresh thanks to the lasting antimicrobial technology. I mean, who wants a grimy case when you’re constantly on the go? The thin profile is perfect for my pockets, and the double-layer protection makes me feel like my phone is wrapped in a cozy, tough fortress. Plus, that lifetime warranty? Talk about confidence in a case! —Sophie Bennett
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Why Samsung S21 Ultra Cases Are Necessary
From my experience, having a case on my Samsung S21 Ultra is an absolute must. This phone is an investment, and its sleek design makes it prone to scratches, dents, and even cracks if dropped. A good case provides the protection I need to keep my phone looking brand new, saving me from costly repairs or replacements.
I’ve also noticed that a case improves my grip on the phone. The S21 Ultra is quite large and can feel slippery in my hand, so a case adds that extra layer of security, reducing the chances of accidental drops. Plus, many cases offer added features like raised edges to protect the screen and camera lenses, which I really appreciate.
Lastly, using a case lets me personalize my phone without compromising its safety. Whether I want something rugged, slim, or stylish, there’s a case that fits my lifestyle and keeps my Samsung S21 Ultra protected every day.
My Buying Guides on Samsung S21 Ultra Cases
When I decided to get a case for my Samsung S21 Ultra, I realized there are a lot of options out there. Choosing the right one wasn’t just about looks; it was about protection, functionality, and comfort too. Here’s what I learned during my search, and hopefully, it will help you pick the perfect case for your phone.
1. Understand Your Protection Needs
The Samsung S21 Ultra is a pricey investment, so protecting it is a priority for me. I asked myself: Do I need heavy-duty protection or just scratch resistance? If you’re like me and tend to drop your phone often, a rugged case with shock absorption is ideal. However, if you’re more careful, a slim case that guards against scratches and minor bumps might be enough.
2. Material Matters
Cases come in various materials — silicone, TPU, hard plastic, leather, and even metal. I found TPU cases to be a sweet spot for flexibility and durability. Leather cases look premium and feel great in hand, but they may wear out faster. If you want a lightweight case, go for slim plastic or silicone options.
3. Design and Style
Since I use my phone everywhere, I wanted a case that reflects my style but isn’t too flashy. There are clear cases that let the phone’s design shine, patterned cases for personality, and minimalist ones for a sleek look. Think about what matches your vibe and daily use.
4. Grip and Comfort
The S21 Ultra is a big phone, so grip is crucial. I chose a case with a textured surface to prevent slips. Smooth plastic cases might look good but can be slippery. If you often use your phone one-handed, consider cases with ergonomic designs or added grips.
5. Compatibility with Features**
Make sure the case doesn’t block important features. I checked that my chosen case supports wireless charging and doesn’t interfere with the S21 Ultra’s cameras or buttons. Some cases also offer built-in kickstands or cardholders, which can be handy.
6. Price vs. Quality
I balanced my budget with quality. Sometimes, spending a bit more on a reputable brand gives peace of mind with better protection and durability. However, there are also affordable cases that do a decent job. Read reviews and avoid super-cheap options that might not last.
7. Additional Features
Some cases come with extras like screen protectors, dust covers for ports, or antimicrobial coatings. I considered these but prioritized what I really needed to avoid overpaying for features I wouldn’t use.
Final Thoughts
Buying a case for my Samsung S21 Ultra was about finding the right mix of protection, style, and functionality. By knowing what matters most to me, I was able to choose a case that keeps my phone safe and suits my lifestyle. I hope my buying guide helps you find your perfect case too!
Author Profile
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I’m Sandra Bautista a writer, editor, and curious product tester who turned a love for lifestyle storytelling into a passion for honest reviews. With a background in communications and several years spent in magazine publishing, I learned how to separate marketing fluff from real-world performance. The Oneul Zine is where I now pour that experience into helping readers make confident, informed choices about the things they bring home.
Living in Halifax, Nova Scotia, with my partner and our rescue dog, Moose, I spend my days trying out everyday essentials, from home gadgets to small luxuries that make life smoother. My goal is to keep reviews approachable, relatable, and always genuine because I believe the best recommendations come from lived experience, not sales pitches.
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