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SAMSUNG Galaxy S21 Ultra 5G Factory Unlocked Android Cell Phone 128GB US Version Smartphone Pro-Grade Camera 8K Video 108MP High Res, Phantom Silver
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Brand | SAMSUNG |
Operating System | Android 6.0 |
CPU Speed | 2.8 GHz |
Memory Storage Capacity | 128 GB |
Screen Size | 6.8 Inches |
Resolution | 2560 x 1440 |
Model Name | Galaxy S21 Ultra |
Wireless Carrier | Unlocked |
Cellular Technology | LTE, GSM, CDMA, UMTS, WCDMA |
Connectivity Technology | Bluetooth, Wi-Fi, USB, NFC |
About this item
- PRO-GRADE CAMERA: Zoom in close with 100X Space Zoom, and take photos and videos like a pro with our easy-to-use, multi-lens camera..Form_factor : Smartphone.Display resolution maximum:3200 x 1440 pixels
- SHARP 8K VIDEO: Capture your life’s best moments in head-turning, super-smooth, cinema quality 8K Video.
- MULTIPLE WAYS TO RECORD: Create share-ready videos and GIFs with multi-cam recording and automatic, professional-style effects.
- HIGHER RESOLUTION, 100X ZOOM: Get amazing clarity with a dual lens combo of 3X and 10X optical zoom and revolutionary 100X Space Zoom.
- ALL DAY INTELLIGENT BATTERY: Intuitively manages your cellphone’s usage, so you can go all day without charging.
- POWER OF 5G: Experience next-generation connectivity for everything you love to do: more sharing, more gaming, more experiences.
- Battery power consumption depends on usage patterns and results may vary. Devices will work on any compatible network. Wireless voice, data and messaging services are compatible with most GSM networks such as AT&T and T-Mobile and CDMA networks such as Verizon, Sprint and US Cellular
This product is available as Renewed.
(15,081)
Works and looks like new and backed by the Amazon Renewed Guarantee
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This Item ![]() SAMSUNG Galaxy S21 Ultra 5G Factory Unlocked Android Cell Phone 128GB US Version Smartphone Pro-Grade Camera 8K Video 108MP High Res, Phantom Silver | Recommendations | |||||
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Price | Currently unavailable. | -42% $349.00$349.00 List: $599.99 | -20% $399.99$399.99 Typical: $499.00 | $259.56$259.56 | $354.74$354.74 | $334.44$334.44 |
Delivery | — | — | Get it Apr 17 - 21 | — | Get it Apr 16 - 18 | Get it as soon as Saturday, Apr 19 |
Customer Ratings | ||||||
Sold By | — | OE USA | amcelltech | BidAllies | Learbre Store Inc | WirelessDistrict |
display size | 6.8 inches | 6.4 inches | — | 6.8 inches | 6.8 inches | 6.9 inches |
memory capacity | 128 GB | 128 GB | 128 GB | 128 GB | 256 GB | 128 GB |
model name | Galaxy S21 Ultra | Galaxy S21 FE | S21 Ultra | Galaxy S21 Ultra | Galaxy S21 Ultra 5G | Galaxy Note20 Ultra 5G |
operating system | Android 6.0 | Android | Android | Android [version] | Android 11.0 | Android |
connectivity tech | Bluetooth, Wi-Fi, NFC, USB | Bluetooth, NFC, USB, Wi-Fi | — | Wi-Fi | Wireless | Wi-Fi |
display type | AMOLED | AMOLED | AMOLED | AMOLED | OLED | AMOLED |
input interface | touch screen | touch screen | touch screen | — | touch screen | touch screen stylus pen |
water resistance | waterproof | waterproof | not water resistant | water resistant | not water resistant | water resistant |
gps navigation | — | ✓ | ✓ | ✓ | ✓ | ✓ |
cpu speed | 2.8 GHz | 1.8 GHz | — | 2.9 GHz | 2.84 GHz | 2.84 GHz |
cellular technology | LTE, GSM, CDMA, UMTS, WCDMA | GSM, LTE, 5G | 5G | 3G, 4G | 5G | GSM, CDMA, UMTS, LTE, 5G |
What's in the box
Product information
Product Dimensions | 7.3 x 3.7 x 2.6 inches |
---|---|
Item Weight | 8.1 ounces |
ASIN | B08N3BYNDN |
Item model number | SM-G998UZSAXAA |
Batteries | 1 Lithium Ion batteries required. (included) |
Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #82,077 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories) #1,520 in Cell Phones |
OS | Android 6.0 |
RAM | 12 GB |
Wireless communication technologies | Cellular |
Connectivity technologies | Bluetooth, Wi-Fi, USB, NFC |
Special features | Bluetooth Enabled, Expandable Memory, LTE, Wireless Charging, Water Resistant |
Other display features | Wireless |
Human Interface Input | Touchscreen |
Scanner Resolution | 2560 x 1440 |
Other camera features | Rear, Front |
Form Factor | Slate |
Color | Phantom Silver |
Battery Power Rating | 5000 |
Whats in the box | Handset, Travel Adapter, Data Cable, Ejection Pin, USB Connector |
Manufacturer | Samsung |
Date First Available | January 14, 2021 |
Memory Storage Capacity | 128 GB |
Standing screen display size | 6.8 Inches |
Battery Capacity | 5000 Milliamp Hours |
Weight | 229 Grams |
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SAMSUNG Galaxy S21 Ultra 5G Factory Unlocked Android Cell Phone 128GB US Version Smartphone Pro-Grade Camera 8K Video 108MP High Res, Phantom Silver
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Product Description
The Samsung Galaxy S21 Ultra 5G phone is epic in every way, with a striking new design, fastest Galaxy processor yet, a battery that goes all day and then some, and the first Galaxy ever supporting super smooth 120Hz screen refresh rate at WQHD+ resolution, it’s no surprise why Ultra easily lives up to its name. We know your life moves fast, and there’s a fine line between what makes a moment ordinary and what makes it extraordinary. That’s why Galaxy S21 Ultra 5G is purposefully crafted so you don’t need to choose between video and photo. With a single tap, you can pull super-clear stills — up to 33MP — straight from high-resolution 8K video. Use the 108MP high-resolution camera for still shots that come out crystal clear whether it’s day or night. Single Take AI transcends the usual restrictions of photo and video editing to capture life’s greatest moments, wherever they happen, in one single take, capturing images and video for up to 15 seconds. Experience the power of the Galaxy S21 5G series. Innovative and beautifully designed, Samsung 5G phones emphasize the brand’s dedication to the latest cutting-edge technology and next-generation connectivity. Enjoy more sharing, more streaming, more experiences, and more connections at lightning-fast speed. The Galaxy S21+ 5G does not currently support eSim in the U.S. Battery power consumption depends on usage patterns and results may vary. 5G speeds vary and require optimal network and connection (factors include frequency, bandwidth, congestion).
Product guides and documents
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers praise the phone's camera quality, noting it takes great shots, and appreciate its long-lasting battery that can last an entire day. The phone's speed receives positive feedback, with its fast in-display fingerprint sensor and smooth 120Hz refresh rate, while functionality works well. The storage capacity receives mixed reviews, with customers noting the large battery but no SD card slot. The charger compatibility is a significant issue, as the phone comes without one.
AI-generated from the text of customer reviews
Customers are satisfied with the phone's camera, praising its quality and picture-taking capabilities, with one customer noting that the video shooting is particularly sharp.
"...and image profiles and nearly every time I get impressive photos from every lens (yes, even the 10x zoom camera can pull off pretty stunning imagery)..." Read more
"...They both have the same 8gb of ram, the same storage sizes, same resolution, same cameras, same material, same flat screen, the same backwards..." Read more
"TL;DR - hardware amazing, software you'll like it or you won't, battery life is inconsistent, let's talk "cinema quality" from the ads..." Read more
"...DISPLAY: the screen looks so damn beautiful and the fact that you have the options to switch between FHD+ at 90hz and QHD+ at 120hz is so cool...." Read more
Customers are satisfied with the phone's battery life, which can last an entire day.
"...get up to 8 or even 9 hours of screen on time and up to 2 days of overall battery endurance...." Read more
"...means, charging does not get the phone as hot, and the battery will have a better lifespan since slower charging is better long term...." Read more
"...BATTERY: this phone really has a giant battery that can last you up an entire day, possibly two days if you're not a heavy user...." Read more
"...The battery life is also quite amazing!..." Read more
Customers praise the phone's speed, noting its fast fingerprint sensor, responsive performance, and smooth 120Hz refresh rate.
"...The colors are vibrant and punchy, the clarity is top-notch, the high refresh rate (variable) really makes the phone feel snappy and quick...." Read more
"...Processor is as advertised, insanely fast, even at the standard limited benchmark (there is an enhanced processing mode to take away cpu 70% limit)...." Read more
"...The colors are vibrant as well. FINGERPRINT: Very responsive, though it will take some time for you to remember where it is on the phone...." Read more
"...drops, it still averaged a full day of battery and fairly decent operation speeds and functions...." Read more
Customers are satisfied with the phone's functionality, noting that Samsung did a great job and it works well, with one customer specifically mentioning it performs well in Alaska.
"...the core functionalities of stock Android while adding in features that are actually more useful than I would have guessed they would be..." Read more
"...All in all the phones good, It suites my needs, but it seems more like an Android Iphone with everything it lacks at this point...." Read more
"...Great job Samsung!" Read more
"...This phone continues to monitor your usage and learn the way you operate with it. Pair it with a smart watch to perfectly shift usage and workload...." Read more
Customers have mixed opinions about the phone's storage capacity, with some appreciating its large battery and larger-than-expected size, while others point out the lack of a microSD slot.
"...Next thing I was a little sad to see the micro sd slot removed, as I've liked having a removable memory card for backing up stuff just incase...." Read more
"...Inevitably as with all Samsung products of course there is some bloatware. But from what I've seen it at least is not overwhelming...." Read more
"...They both have the same 8gb of ram, the same storage sizes, same resolution, same cameras, same material, same flat screen, the same backwards..." Read more
"...Unfortunately, you are unable to use the Google camera ports using Hardware shortcuts to launch the camera if the phone is locked which makes this..." Read more
Customers report significant issues with the phone's charger compatibility, noting that it comes without a charging brick or plug, making it impossible to charge the device.
"...Inconsistent battery life /charging speeds - when I first got this, we're talking 19 hours of me using it. That was impressive...." Read more
"...I strongly feel not including a charging block is just a cash grab, but we won't get into that lol...." Read more
"...One negative I will say is that the phone does not come with a charger, which can be annoying if you don't already have any existing charger on hand...." Read more
"...I restart is because whenever I move to a location, the connection will become unstable/slow...." Read more
Reviews with images

Most amazing phone ever
Top reviews from the United States
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- Reviewed in the United States on August 19, 2021It's hard to know where to really begin with reviewing this phone, because everything about it is simply amazing! But here goes:
Build Quality & Design: So I was at first a bit apprehensive about the curved display because I wasn't sure how I would feel about it (every other phone I've had had a flat display), but the curve is subtle enough that it's very easy to get used to and actually adds a bit to the ergonomics of the design. The color looks just as stunning in person as it does in photos and the overall design of the phone looks incredible. The phone feels sturdy and the buttons have a very satisfying click to them and the fingerprint sensor has a great placement and works wonderfully.
Display: The 1440p, 120Hz, display on this phone lives up to its reputation of being the best display you can get on a smartphone in 2021. The colors are vibrant and punchy, the clarity is top-notch, the high refresh rate (variable) really makes the phone feel snappy and quick. The touch sensitivity is also great and never feels like I have to put too much effort into moving around the UI.
UI: I was a bit apprehensive of One UI as I hadn't used a Samsung phone since the Galaxy S4 (and the days of the old TouchWiz) and I have been using Pixel/Nexus phones for the last 6 years. I have been pleasantly surprised, though, by how much it retains the core functionalities of stock Android while adding in features that are actually more useful than I would have guessed they would be (having Google One feed to the left of the homescreen is a great addition by Samsung). From the ease of connecting Samsung peripherals (I have Galaxy Buds+ and a Galaxy Watch 3) to the extended screenshot feature to the baked in screen record and everything in between, Samsung has really matured in their UI to now offer a lot of useful add ons while limiting the unnecessary bloat.
Battery: This is the first phone I've had where I really can feel confident that my battery is going to last me the full day if I'm going to be out and about and away from the charger. Even with full 1440p and 120Hz enabled, I'm easily able to achieve 5 to 6 hours of screen on time with roughly 20 to 24 hours of total battery endurance. On days that I don't push the phone as hard, I can get up to 8 or even 9 hours of screen on time and up to 2 days of overall battery endurance. Only on days that I'm scrolling through videos on TikTok, taking a lot of photos and videos, and really just having the screen on all day do I need to charge it even a little before the day is up (and even then getting it to even 50% is enough to give me confidence for hours).
Camera: My last phone was a Google Pixel 3XL which, at the time, was basically the leading smartphone camera and could produce amazing shots every time. I wouldn't say that this camera is as consistently and easily good, but the potential for great shots is even greater with this phone. Occasionally I have to take a few different shots to get the one that I want, but when I get what I want, it looks incredible. And this applies to all of the cameras, which brings me to the second point ... The variety of cameras here makes the experience wonderful. I'll frequently take 3 or 4 different shots utilizing all of the cameras to gain different perspectives and image profiles and nearly every time I get impressive photos from every lens (yes, even the 10x zoom camera can pull off pretty stunning imagery). The camera is definitely a high point for this camera, but you do need to be willing to work with it a bit more than you would on a Pixel or iPhone which are better quick point and shoot cameras, but lack some of the diversity of use that you can get with the Galaxy S21 Ultra.
Conclusion: Overall, this phone is just incredible from top to bottom and is by far the best phone that I've ever owned. I would recommend this to anyone that is willing to pay a bit more for a premium device.
- Reviewed in the United States on April 14, 2021I upgraded from the Galaxy s8 to the S21 Ultra with 256 gb of storage and 12gb of ram. I will start off by saying go with the Ultra or the base, you pay $200 extra for half an inch of screen on the plus (this is called decoy price, you see this at movies where the popcorn medium is only 1 dollar less than the large, but is 3 more than the small, so you might as well go large.)
I'll give more detial at the end.
Camera is super high quality, zoom is incredible. Front camera even takes good pics (I mean I looked good, so should you)
Processor is as advertised, insanely fast, even at the standard limited benchmark (there is an enhanced processing mode to take away cpu 70% limit). Desktop mode is great, this phone is almost as fast in Dex as my actual Acer laptop.
Battery life is phenomenal, can get 2 full days out of 1 charge if you use the phone less than 4 or 5 hours a day at 1080p res.
1440p, super clear and one of the bargaining point for the Ultra over the base. The refresh rate of 120 hz is incredible, I spent the first 10 minutes just swiping on the phone in awe of this. The ultra is also the only version with the curved screen,, the s21 and plus have flat screens.. This phone does an excellent job of cooling, even witha case on. (FYI heat causes the major wear and tear on the internal components like the cpu, so better cooling means better lifespan and performance).
Customizable routines allow you to add features to your phone, from automatically silencing when you show up to work or school, automatically going into power save mode at certain times like when you are asleep, or even for when you turn on your Bluetooth headphones your phone can automatically switch to 1440p resolution and turn Dolby atmos on movie mode sound. Dozens of scenarios or time stamps for each feature.
If you are the friend that walks on the grass, don't worry about bringing that bulky charger for when your friends' phones are about to die, this phone can wireless charge other devices (will stop charging when the phone drops to 30% minimum).
If you are concerned about no color options, just remember, I had that beautiful orchid gray s8, and who got to see it? Nobody, because it was hidden behind a lovely teal case for 4 years.
If the fact that Samsung dropped their charging from the 45w of the s20 series to a 25w for the s21, rest assured, there is very little added time for charging, and the 25w is less volatile than the 45w. This means, charging does not get the phone as hot, and the battery will have a better lifespan since slower charging is better long term.
If you multi task a ton and/or save tons of files, consider spending the extra money to get the 512 gb edition, as it comes with an additional 4gb of ram (16gb total).
Ram is what is used to have tabs open, so more ram means more tabs open while still maintaining speed and smoothness. The s21 ultra also has Spen support (need a case that can hold it).
Why the ultra or base and not the plus?
The s21 has a better ppi (pixel density, higher the density, better the picture) than the s21 plus. They both have the same 8gb of ram, the same storage sizes, same resolution, same cameras, same material, same flat screen, the same backwards wireless charging capability (same for ultra), etc. The only difference is the screen size and that the s21 plus has a 4800 mAh battery while the s21 has a 4000 mAh. The ultra however, offers higher resolution, much higher ppi, the larger screen, larger battery than both (5000mAh). The ultra has much more powerful camera as well, the curved screen, camera features and settings. So if you want all the features and performance and screen resolution (I like the stream movies on my lunch breaks) then go with the Ultra, if you just want to upgrade to the newest and fastest phone, and you don't need to have 100000 tabs open, get the base s21.
Top reviews from other countries
- VishnuReviewed in India on January 18, 2022
1.0 out of 5 stars I purchased product with snapdragon 888, they delivered exynos 2100 processor
VishnuI purchased product with snapdragon 888, they delivered exynos 2100 processor
Reviewed in India on January 18, 2022
Images in this review
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Guadalupe H.Reviewed in Mexico on June 23, 2021
5.0 out of 5 stars Buena compra
Compré aquí el Samsung Ultra después de dudarlo muchas veces. Me termine convenciendo por que tenía más de un 35% de descuento y pensé en caso de que haya algún problema después de la garantía de Amazon podré arreglarlo con menos de lo que ahorré.
A un mes de uso les digo que todo va perfecto. Me llegó al día siguiente el equipo, sin ningún defecto y ha funcionado excelente. No hay tema con la red celular. Las fotos son buenísimas, la rapidez del equipo también.
A 5 meses de uso les comento que sigue funcionando al 100, no he tenido que recurrir a garantía. Cambié de compañía telefónica 2 veces y no hubo tema tampoco.
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Carlos PeñaReviewed in Mexico on November 9, 2021
5.0 out of 5 stars El mejor smartphone de 2021
Sin duda el mejor Mobile de 2021, la mejor pantalla, la cámara está en el top 3 y si descargas la Gcam ya la conviertes en la mejor cámara del año sin ofender al Pixel y al iPhone (las fotos que tomas con el iPhone 13 Pro son prácticamente las mismas que toambas con el iPhone 11 Pro), el zoom de este móvil destroza al iPhone y a cualquier Pixel, además la ergonomía también es mejor que los anteriormente mencionados; lo único en que si es mejor un iPhone es en la batería, pero no significa que sea una mala batería la del S21 Ultra.
La mejor compra que puedes hacer pero cuida que sea la versión Snapdragon, sino no puedes descargar la Gcam.
- Amazon CustomerReviewed in the United Arab Emirates on September 26, 2024
1.0 out of 5 stars VERY BAD
DO NOT BUY THIS.
This is either fake or a used mobile. Within 6 months the cameras became blurry and two vertical lines appeared on the screen. When checked online using the serial number the warranty shows as expired long ago. Very disappointed. Best option is to go to a reputed showroom or authorized dealer and buy from them rather than wasting money on such online platforms.
- SayedReviewed in the United Arab Emirates on December 27, 2024
5.0 out of 5 stars very good
Very good, I am very satisfied, I gave this phone to my younger brother and bought a more advanced Samsung phone.