Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy
Color
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Specifications
- Screen Size6.8 inchesRear-Facing Camera108 megapixelsCarrier CompatibilityAT&T, Sprint, T-Mobile, Google Fi, Verizon, Cricket, Mint Mobile, Simple Mobile, H2O Wireless, Ting Mobile, Ultra Mobile, Metro by T-MobileBuilt-in Storage128 gigabytesPhone Memory (RAM)8 gigabytes
- Key Specs
- Screen Size: 6.8 inches (Size of the screen, measured diagonally from corner to corner.)
- Rear-Facing Camera: 108 megapixels
- Carrier Compatibility: AT&T, Sprint, T-Mobile, Google Fi, Verizon, Cricket, Mint Mobile, Simple Mobile, H2O Wireless, Ting Mobile, Ultra Mobile, Metro by T-Mobile
- Built-in Storage: 128 gigabytes
- Phone Memory (RAM): 8 gigabytes (Random-access memory (RAM) temporarily stores data so that it can be accessed quickly. The size of the RAM determines how efficiently the phone can handle large amounts of information at once, such as switching between several open apps.)
- General
- Brand: Samsung
- Model Number: SM-G998UZBAXAA
- Product Name: Galaxy S21 Ultra 5G 128GB (Unlocked)
- Color: Navy
- Display
- Screen Size: 6.8 inches (Size of the screen, measured diagonally from corner to corner.)
- Camera
- Integrated Camera: Front, Rear
- Front-Facing Camera: 40 megapixels
- Rear-Facing Camera: 108 megapixels
- Network
- Carrier: Unlocked
- Carrier Compatibility: AT&T, Sprint, T-Mobile, Google Fi, Verizon, Cricket, Mint Mobile, Simple Mobile, H2O Wireless, Ting Mobile, Ultra Mobile, Metro by T-Mobile
- Network Connectivity: 5G (The manner in which a device sends data to another device over a long distance using a cellular network.)
- Unlocked: true (Can be used with any carrier, typically by exchanging the phone's SIM card with another one compatible for the intended area of service. Can be used with a new or existing cellular service plan.)
- No-Contract: true (Can be purchased without committing to a contract with a cellular service provider. No-contract phones are only compatible with a specific carrier.)
- Mobile Hotspot Capability: true (A hotspot-enabled device is able to connect wirelessly to a cellular network and share the connection via Wi-Fi with nearby compatible devices.)
- Connectivity
- Headphone Jack: false (The device features an interface that allows for the connection of headphones.)
- Wireless Connectivity: Bluetooth (The manner in which a device sends data to another device over a short distance without the use of wires or cables.)
- Compatibility
- Charging Interface(s): USB-C (The connection for transmitting power to charge the device.)
- Voice Assistant Built-in: Bixby (A digital assistant built into the device that uses voice commands to answer questions and control smart devices.)
- Power
- Wireless Charging: true
- Features
- Model Family: Samsung Galaxy S21 Ultra 5G
- Ingress Protection (IP) Rating: IP68 (A 4 to 6 character code classifying a product's degree of protection against intrusion of solid particles and liquids as well as impact. Each number in the IP Code denotes a level of protection, determined through testing and published by the International Electrotechnical Commission (IEC). The first digit represents the degree of protection against solid foreign objects or particles and the second digit represents the degree of protection against water ingress.)
- Built-in Storage: 128 gigabytes
- Performance
- Operating System: Android 11 (The operating system manages all software and hardware, including files, memory and connected devices. Most importantly, it lets you interact with your device and your programs in a visual way; otherwise, you'd be typing computer code to get anything done.)
- Processor Brand: Snapdragon
- Phone Memory (RAM): 8 gigabytes (Random-access memory (RAM) temporarily stores data so that it can be accessed quickly. The size of the RAM determines how efficiently the phone can handle large amounts of information at once, such as switching between several open apps.)
- Dimensions
- Product Height: 6.2 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
- Product Width: 3.1 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
- Product Depth: 0.3 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
- Product Weight: 0.4 ounces (The out of box weight of the item.)
- Warranty
- Warranty - Parts: 1 year
- Warranty - Labor: 1 year
- Other
- UPC: 887276581804
Galaxy S21 Ultra 5G is crafted so you don’t need to choose between video and photo. With a single tap, you can pull super-clear stills straight from high-resolution 8K video. Or if you’re looking to capture stunning photos, the 108MP camera feels like you’ve brought your own professional studio with you. Galaxy S21 Ultra 5G, designed to be epic in every way.
- Life moves fast. S21 Ultra moves faster.: Transform your story sharing, live streaming, video-editing and multi-tasking with hyper fast processor speeds (Compared to GS20)
- Universal Unlocked: Compatible with all major U.S. carriers, including Verizon, AT&T, Sprint, and T-Mobile. Also compatible with prepaid carriers, including Cricket Wireless, Boost Mobile, Metro by T-Mobile, Simple Mobile, Total Wireless, Tracfone, Net10, Mint, and H2O.
- Connectivity built for today. And tomorrow.: Built with 5G connectivity in mind, you can share, scroll, browse and binge in a flash¹.
- Our best camera. Your best life.: Zoom in close, take photos and videos like a pro, and capture incredible share-ready moments with our easy-to-use, multi-lens camera.
- Trust us, you'll look amazing in 8K video: A night out. Your best friend’s birthday party. Family moments you’ll want to remember forever. Capture your life’s best moments in head-turning, super-smooth 8K video.
- Movie-making magic in the palm of your hand: Slide into the director’s chair and create share-ready videos on the spot with multi-cam recording and automatic pro-style effects.
- Spontaneity, now captured from multiple angles: Create share-ready GIFs and videos in a single take² or pick your favorite moments and pull your favorite stills in super high-res to share with your followers.
- The highest resolution camera you can get on a smartphone: Pick up more pixels with the highest resolution you can get on a smartphone at 108MP, while an upgraded sensor gives you more color and way less noise in low light³.
- Get closer with the most powerful zoom on a smartphone: Zoom in with amazing clarity with a dual-lens combo of 3x and 10x optical zoom, or go even further with our revolutionary 100x Space Zoom.
- Our best smartphone display yet. There, we said it.: Galaxy S21 Ultra comes with our highest contrast ratio and a 6.8" adaptive display that automatically adjusts from 10Hz to 120Hz. Plus, intuitive blue-light management adjusts based on time of day to keep your eyes happy.
- All your photos are keepers. So keep ‘em.: Every moment matters. Hold on to them with S21+ 5G’s extensive built-in storage⁴.
- All day battery, and then some. No charging.: Power every scroll, click, tap, and stream all day long and then some⁵ with an intelligent battery that works with you, not against you⁶.
- A striking new phone design — may cause phone envy: Modern haze finishes with an all-new integrated metal camera design and our toughest glass on a smartphone. Groundbreaking — it’s a vibe. And it looks good on you.
- Life moves fast. S21 Ultra moves faster.: Transform your story sharing, live streaming, video-editing and multi-tasking with hyper fast processor speeds (Compared to GS20)
- Universal Unlocked: Compatible with all major U.S. carriers, including Verizon, AT&T, Sprint, and T-Mobile. Also compatible with prepaid carriers, including Cricket Wireless, Boost Mobile, Metro by T-Mobile, Simple Mobile, Total Wireless, Tracfone, Net10, Mint, and H2O.
- Connectivity built for today. And tomorrow.: Built with 5G connectivity in mind, you can share, scroll, browse and binge in a flash¹.
- Our best camera. Your best life.: Zoom in close, take photos and videos like a pro, and capture incredible share-ready moments with our easy-to-use, multi-lens camera.
- Trust us, you'll look amazing in 8K video: A night out. Your best friend’s birthday party. Family moments you’ll want to remember forever. Capture your life’s best moments in head-turning, super-smooth 8K video.
- Movie-making magic in the palm of your hand: Slide into the director’s chair and create share-ready videos on the spot with multi-cam recording and automatic pro-style effects.
- Spontaneity, now captured from multiple angles: Create share-ready GIFs and videos in a single take² or pick your favorite moments and pull your favorite stills in super high-res to share with your followers.
- The highest resolution camera you can get on a smartphone: Pick up more pixels with the highest resolution you can get on a smartphone at 108MP, while an upgraded sensor gives you more color and way less noise in low light³.
- Get closer with the most powerful zoom on a smartphone: Zoom in with amazing clarity with a dual-lens combo of 3x and 10x optical zoom, or go even further with our revolutionary 100x Space Zoom.
- Our best smartphone display yet. There, we said it.: Galaxy S21 Ultra comes with our highest contrast ratio and a 6.8" adaptive display that automatically adjusts from 10Hz to 120Hz. Plus, intuitive blue-light management adjusts based on time of day to keep your eyes happy.
- All your photos are keepers. So keep ‘em.: Every moment matters. Hold on to them with S21+ 5G’s extensive built-in storage⁴.
- All day battery, and then some. No charging.: Power every scroll, click, tap, and stream all day long and then some⁵ with an intelligent battery that works with you, not against you⁶.
- A striking new phone design — may cause phone envy: Modern haze finishes with an all-new integrated metal camera design and our toughest glass on a smartphone. Groundbreaking — it’s a vibe. And it looks good on you.
Whats Included
- Galaxy S21 Ultra 5G 128GB (Unlocked)
- Galaxy S21 Ultra 5G 128GB (Unlocked)
Q: does it come with a charger?
A: No it does not
Q: Does this phone still except expanded memory micro SD cards?
A: Hello, Jim. Unfortunately, the Galaxy S21 Ultra 5G is not able to accept a MicroSD card. Thank you for asking this question. ^Kayla
Q: Will this phone work on a straight talk plan?
A: If you purchase the unlocked version then it will work with any carrier, you just need to plug your SIM card in and it should register it automatically.
A: Single sim no SD cards slot
A: Yes all version have the Snapdragon 888. Only the non-US models have the Exynos 2100 inside.
Q: Can't activate galaxy s21 on cricket wireless or any company
A: Having the same issue and I bought it unlocked from best buy?! My cricket sim would not even show up in the phone or a tmobile one. Or a brand new sim from cricket. The phone isn't on crickets list either because it's not 5G compatible allegedly. So I'm trying to figure this out. Exchanged the phone to see if it was a faulty phone. Literally so frustrating. What carrier can I switch to?
A: Yes, any type C charger is compatible, with adaptive fast chargers working faster than normal chargers.
Q: Does The phone comes with s pen?
A: It doesn't, you have to buy it separately
Compare similar products
Galaxy S21 Ultra 5G is crafted so you don’t need to choose between video and photo. With a single tap, you can pull super-clear stills straight from high-resolution 8K video. Or if you’re looking to capture stunning photos, the 108MP camera feels like you’ve brought your own professional studio with you. Galaxy S21 Ultra 5G, designed to be epic in every way.
The real metal finish on the main camera adds unity to the design and accentuates the luxury of the haze texture. It’s a bold new camera design in a category of its own. The 108MP sensor gives you the highest resolution possible on a smartphone. Featuring all new 12-bit processing that offers a wider range of colors for crystal clear shots. And with nona-binning technology, it even helps take in more light for great exposures in dark scenes. 108MP for so much detail, you can crop, crop and crop again. The New Dual Zoom lens system is faster and sharper than any zoom before, featuring a 10MP Dual telephoto lens and enhanced Super Resolution. It even has a Zoom Lock feature so you can stabilize shots while zooming. Now zoom up to 100X with clarity and precision. Shoot like a pro, with incredible details at 8K resolution and smooth action at 24 frames per second. It’s the highest resolution video available on a smartphone. Witness the fastest chip ever in a Galaxy. With a 5nm processor on board, you get seamless multitasking and a hyper-fast content streaming. The new battery in the Galaxy S21 Ultra 5G isn’t just big. It’s got the brains to match, intelligently learning your app usage to optimize power consumption. Get the power that outlasts the day even in 5G. A 120Hz refresh rate allows for the smoothest scrolling screen to keep up with all your feeds. It constantly adjusts for the best viewing experience, and even helps your battery last longer. Meet the most vivid and brightest display in a smartphone. Even the direct light of the sun can't stop your viewing pleasure. Thanks to our Eye Comfort Shield, it even intelligently adjusts blue light so your eyes won't feel so tired.
This Samsung Galaxy S20 Ultra 5G cell phone can perform more daily routines efficiently and is packed with power while equipped with an intelligent battery that's big enough to share. The 6.9" Infinity-O display creates near-perfect images and features high-quality cameras with 3D depth sensing and 100x Space Zoom capabilities, capturing more details to create a realistic image. Backward-compatible with 4G networks.
When everything just works, you stay in the moment. Samsung Galaxy S26 Ultra anticipates what you need next, empowers your creativity, delivers powerful performance with stunning, ultra-vivid viewing and even gives you the freedom to keep your screen private—whenever you choose. Out with friends and capturing the night? Nightography brings every scene to life, revealing rich detail even in low light. Snap photos or record video confidently as the night goes on, and then use Photo Assist with Galaxy AI to refine your shots in seconds —cleaning up distractions, enhancing details and helping every memory look the way it felt. No extra apps. No slowing down. Creativity doesn’t stop once the moment is captured. Creative Studio with Galaxy AI on Galaxy S26 Ultra turns inspiration into creation, just like that. Transform photos into custom stickers, design invitations or generate entirely new images using a simple prompt —all without switching apps or learning new tools. Whether you’re refining a memory or imagining something brand new, Galaxy AI helps bring ideas to life effortlessly, so creativity feels intuitive, not technical. When it’s time to turn ideas into plans, Galaxy S26 Ultra makes it simple. Now Nudge with Galaxy AI helps you stay on top of conversations by suggesting quick actions like adding an event, sharing a photo or finding a location —all without slowing things down. All of this happens with privacy in mind. With the world’s first privacy display built into a phone, you can keep personal moments for your eyes only. Whether you’re creating, checking emails or just catching up, everything feels effortless and on your terms. Samsung Galaxy S26 Ultra is more than a smartphone —it’s your companion.
| Pros for Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy | |||
|---|---|---|---|
| There were no pros for this product— | Overall Performance, Camera Quality, Condition, Battery Life, Speed | There were no pros for this product— | There were no pros for this product— |
Specs
Reviews
Customer Images
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
- Rated 5 out of 5 stars
Proven winner
I love this phone. Battery life is still amazing after owning it for over a year and a half. Camera is hands down amazing. Makes iPhone users jealous with the zoom features. I don't want to upgrade it because it's still a awesome phone. Photos are of the of a cabin across the lake and half way up the mountain. You can't even see the cabin in the picture from the lake shore. It zooms in very far. I also use the zoom feature on this camera as a spotting scope at the gun range.
This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy
AndrewA Posted
- Rated 5 out of 5 stars
Great phone
My favorite phone!! Love the matte finish very fast. Great camera plus the s pen support ..i am coming from the note 20 ultra. And i love this phone and have not looked back lol most importanly. I love this color I also bought the laptop to match .
This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy
Techuser95 Posted
- Rated 4 out of 5 stars
Loved this phone but shatter after awhile
Loved my s21 ultra really nice phone amazing camera but shattered after a few months still really nice phone amazing display 120hz feels like a dream on Pokémon go
This review is from Samsung - Galaxy S21 Ultra 5G 128GB (Unlocked) - Navy
TrentanE Posted
