Samsung Galaxy S21 Ultra 5G, 128GB, Phantom Silver - Locked to AT&T (Renewed)
Condition: Refurbished - Excellent
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Availability:
Only 5 left in stock, order soon!
Arrives
Thursday, Jul 9
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Color: Phantom Silver
Service provider: AT&T
Memory Storage Capacity: 128 GB
Product grade: Renewed
Features
- This pre-owned product that has been professionally inspected, tested and cleaned by Amazon-qualified suppliers.
Description
Amazon Renewed is your trusted destination for a huge selection of smartphones, computers, video games, power tools and even more products that work and look like new and are backed by the Amazon Renewed Guarantee.
Brand: Samsung
Operating System: Android
Ram Memory Installed Size: 12 GB
CPU Model: Qualcomm Snapdragon S4 MSM8270
CPU Speed: 2.9 GHz
Memory Storage Capacity: 128 GB
Resolution: 1440 x 3200
Refresh Rate: 120
Model Name: Samsung Galaxy S21 Ultra 5G
Wireless Carrier: AT&T
Operating System: Android
RAM Memory Installed: 12 GB
Processor Series: Qualcomm Snapdragon S4 MSM8270
Processor Speed: 2.9 GHz
Memory Storage Capacity: 128 GB
Color: Phantom Silver
SIM Card Slot Count: Single SIM
Connector Type: USB Type C
Form Factor: Slate
Biometric Security Feature: Fingerprint Recognition
Human-Interface Input: Touchscreen
Sim Card Size: Nano
Water Resistance Level: Water Resistant
Headphones Jack: No headphone jack
Rear Facing Camera Photo Sensor Resolution: 108 MP
Camera Description: Front, Rear
Shooting Modes: Automatic
Number of Rear Facing Cameras: 3
Number of Front Cameras: 1
Battery Capacity: 5000 Milliamp Hours
Battery Description: Lithium-Ion
Item Dimensions: 6.7 x 3.4 x 2.44 inches
Video Capture Resolution: 8k
Frame Rate: 24 FPS or 30 FPS
Resolution: 1440 x 3200
Refresh Rate: 120
Display Type: OLED
Aspect Ratio: 2.101
Display Resolution Maximum: 3200 x 1440
Wireless Provider: AT&T
Cellular Technology: 5G
Connectivity Technology: Wi-Fi
Wireless Network Technology: Wi-Fi
Brand: Samsung
Model Year: 2021
Built-In Media: Adapter, USB Cable
Manufacturer: Samsung Electronics
Model Series: S21
Specific Uses For Product: photography, streaming, video_conferencing, videography
UPC: 686457991964
Unit Count: 1.0 Count
Phone Talk Time: 50 Hours
GPS Geotagging Functionality: True
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 9
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Phantom Black
Service provider: T-Mobile
Memory Storage Capacity: 256 GB
Product grade: Renewed
Purchased device in March 2023. Worked perfectly with no slowdown or battery issues issues until I decided to upgrade June 2026.
Reviewed in the United States on June 8, 2026 by Andrew X.
Color: Phantom Silver
Service provider: Unlocked
Memory Storage Capacity: 128.0 GB
Product grade: Renewed
This review is gonna be long but it totally deserves the space! I'll update this with pictures as soon as I can but I wanted to go ahead and post my review now. I ordered this phone (the S21 Ultra 5G) on Monday June 22nd and received it literally the very next day. Although I paid a little extra for overnight shipping, I still didn't expect that it would actually get here when it was supposed to....OTHER sellers are to blame for that. Anyhow, my reason for wanting to post this review so soon is to express my relief and my sincere gratitude for this remarkable phone! Even though it's refurbished, it seriously couldn't be closer to the quality of a brand new phone! No dents or scratches, and the screen is flawless, and of course the most important thing of all is that it's very fast with no freezes or glitches and it operates just like a brand new phone! You can also tell that the seller put thought into the packaging which wasn't expected due to my previous not-so-good experience with OTHER sellers as I mentioned above. If you've read this far then please know this- if you ultimately decide to purchase from this seller, you won't be disappointed! Thank you so so much for making this buy truly wonderful and if I ever need something and I see that you're selling it, I'm not hesitating to grab it! Unlocked, best value for your money, connectivity is 10/10, setup was a breeze, and storage capacity was exactly as advertised.
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Reviewed in the United States on June 23, 2026 by Brittany
Color: Phantom Black
Service provider: CDMA Carriers
Memory Storage Capacity: 128 GB
Product grade: Renewed
I was very apprehensive about buying a refurbished phone but after reading so many 5 star reviews i pulled the trigger. The first one i got looked brand new cosmetically but any time i would go to charge it it said there was "Water in the charging port" and wouldn't let me charge the phone (there was no water anywhere near the phone, let alone in the charging port). That kept happening until i returned it for another one. This one (got it in March of 2023) looked great too cosmetically but functionality is the big issue. First it wouldn't give me any notifications of emails - I went through all the prompts and settings, changed everything I could...still no notifications of emails. The only time it will notify me is if I actually open up Gmail - then it will pop up saying you have x amount of unread messages but if I'm already opening the program it's completely useless! Then I started having people tell me "I was calling you but it went straight to voicemail" I thought it was odd but maybe it was service related. I went to my wireless provider and they said there is nothing wrong with the service it's probably the device. My wife has the same exact service with a different phone and has service throughout the house. Now not only can i not make or receive calls in my house I can't send text messages! The phone will say I have full service (5 bars) plus I'm connected to Wifi 6 with a 1 gig fiber connection. When I go to send a message it will just keep spinning and spinning until the message times out after a long time. The only way I've figured out how to trick the phone into sending messages is send the message, turn the phone on airplane mode and then switch airplane mode off again and the message will send. To add insult to injury last month I noticed a small artifact on the screen that does not go away. I've had this phone for less than a year and I have a permanent line on the screen that shows even when it's on the charging screen. I purchased this from the seller "TheGadgetDeals" because they had 100% positive reviews - not sure how that's possible if these are the kind of phones they are selling. So with no email notifications, no ability to make or receive calls or send text messages in my house (and a lot of times other places) I effectively have a $450 paper weight masquerading as a phone. If you're ok with spending nearly $500 on a phone that will be essentially unusable within 7 months of purchasing I say go for it, otherwise I'd look elsewhere! 1/10 WOULD NOT RECOMMEND PS. After owning the phone for a month or so i purchased another one for my wife (also from TheGadgetDeals) her phone came in excellent cosmetic condition but every time she would make or receive a call the person on the other end would hear an echo of everything they said so that phone had to returned
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Reviewed in the United States on October 29, 2023 by Michael
Color: Phantom Black
Service provider: Unlocked
Memory Storage Capacity: 128 GB
Product grade: Renewed
Excellent!! Arrived faster than expected. Condition is like brand new. Work perfectly. I am very happy with my purchase!
Reviewed in the United States on April 29, 2026 by Donald Smith Jr
Color: Phantom Silver
Service provider: CDMA Carriers
Memory Storage Capacity: 128.0 GB
Product grade: Renewed
I’ve spent the last number of years using a slew of different phones from OnePlus, LG, Motorola, Huawei, Sony, and the last HTC. I haven’t used a Samsung since the S7. I’ve avoided them because while they were well built, they had software that was so bloated, it drove me nuts. So, what is it like going to Samsung after so long? HARDWARE Back in the day, only Apple rivaled Samsung when it came to the best hardware. Samsung can no longer make that claim. Granted, this phone is excellent, but OnePlus, LG, and Apple are all on the same level in terms of quality build. This phone feels heavy in your hand. I personally like that, but someone coming from an Apple might be very disappointed. Going light weight was not a big consideration here. It seems like they were more focused on packing as much as possible into this phone. That leads to a big issue. Samsung has been cowed into trying to be like Apple and removed both the headphones jack and sd card slot. I see no real reason for this beyond saving money. Apple and Samsung claim that they can’t fit it in, or that no one uses them anymore. Both of those are nothing but lame excuse. Both LG and Sony put both items into their last flagships. LG in fact released HD audio to go with the headphones jack. After using both phones, I REALLY miss both those items. They added a huge amount of functionality and made doing certain things so much easier. They did add the latest and greatest 5G and Wifi connectivity to this phone. That sounds great, but I haven’t noticed it all. I even live in an area where 5G is everywhere. There might be more speed, but everything in my area was already fast. It’s hard to really notice a difference unless you are running a speed test. So, this phone is S-Pen compatible. Great. It would be really good if it actually came with an S-Pen, but you’ll have to pay more for that. By more I mean $40 for an s-pen designed for the Ultra, that is missing some functionality. That’s right, you can’t do gestures. If that’s important to you, you need to wait for the S-Pen Pro to be released “later” in 2021. That one will have a BT connection. That really seems like a fumble on Samsung’s part. I can understand making the s-pen optional and not having a silo for it, like on the Note, but not having the full-blown version available at launch feels like they are missing an opportunity. If people get the regular s-pen, decide they don’t use it, what’s to motivate them into getting the pro version? The S-pen can be handy, but it only makes sense if you get a case that can hold. Thankfully Spigen makes one that is cheap and works well. On the plus side, this phone has the fastest, most accurate fingerprint reader I’ve ever used. It’s easily twice as fast as the one LG was using. The ultrasonic format really makes a difference. CAMERA When I first used the Huawei P20 Pro, I was blown away by how good that camera was. The things it did were unprecedented in a camera phone. I used a number of phones after that one, and none of them ever matched what Huawei could pull off. Samsung crushed it with this camera setup. The flexibility it offers is unmatched. From wide angle to super zoom, it’s all there. Some of the tricks they pull off with this camera are truly impressive. From how it combines photos for optimal exposure to the foolish 100x superzoom, the things you can do with this camera are insane. The 100x is nothing you’ll want to use a lot. It’s usable, but not overly clear. Still, the mere fact that you can take a usable 100x photo with this phone is mind blowing. When I say “usable” I mean a photo that is identifiable. It’s nothing I’m going to want to hang on a wall, but it might help trying to identify something. If there is one thing camera doesn’t do great, it’s exposure. It tends to over expose, but that’s it. That’s the only real issue I can find and it’s minor. You might see the 108MP sensor and think you can take some insane RAW photos with that. To a degree, that’s true, but with a sensor like that, you’d need a HUGE amount of light to be able to get good results. There is a reason why Samsung does pixel binning to get its incredible results. On its own 108MP in a sensor that size is not really usable, except in ideal conditions. I love a good wide-angle camera. LG was always a proponent of the wide-angle, and over the years, it’s really come in handy. It’s not something you use a lot, but when you need it, nothing beats it. You get two tele-photo lenses here. The 3X is great for framing your photos, and the 10x allows you to do things that no over phone I’ve ever used has allowed. The 10x really comes in handy for sunsets and times when you can’t get close to your subject. CHARGING I usually don’t do a write up on charging, but in this case, I think it’s needed. You have wired 25W or wireless 10W. I love that flexibility. It’s not all good though. You know what really stinks? Paying through the nose for a phone, opening the box, and not getting a charger. That’s right. No charger in the box. If you want one, you’ll be paying for it. It’s hard to wrap your head around the fact that they charge you over $1,000, but couldn’t give you a charger. I can’t remember the last time I got a phone with no charger. SCREEN Till now, OnePlus had the best screen I’d seen in a phone. It makes sense that Samsung would beat them, considering OnePlus got their screens from Samsung. This screen is amazing. It’s not just it’s looks either. They did some impressive trickery here too. The adaptive refresh is amazing. The big issue with a 120 refresh rate is the battery it burns through. With adaptive turned on, it adjusts. Reading a book or something similar – it drops as low as 10. This saves a huge amount of battery life. BATTERY LIFE It’s good. It’s not LG V60 good, but it’s good. There have been times when the LG V60 lasted me for two days with normal use. This one has the same battery, but doesn’t last that long. It will easily make it through the day and night though. SOFTWARE Welcome to the worst part about this phone. I know why Samsung doesn’t fix it too. To be honest, I hate the Samsung apps, I hate the excessive bloatware, and Bixby is the worst virtual assistant I’ve ever used. The UI is the more frustrating of the issues here. The main reason is tied to the fact that this is an Android phone. Why do you want to be so different from stock when it’s actually hindering the experience instead of improving it? I understand what Samsung is trying to do. They want to be Apple. They want their own ecosystem, they control, and reap large profits off of. That’s why they have their own assistant, apps, and UI. I’d applaud them for that, if they grow a pair and divorce Android. The only way all the apps, bloatware, assistant, and UI make sense if they are on their own. Just do it already. Become the third option, because as it stands now, your software is awful. It’s trying to sit on a fence, which means it’s not as good as it could be on its own, and it’s NO WHERE as good as stock Android. Now, if you are a handy when it comes to Android, you can remove a lot of the junk off this phone, via ADB. But, stop and think about that for a moment. You just paid top dollar for a phone, and now, you have to waste a solid hour of your time stripping off all the garbage they piled on there. How is that acceptable? If this phone was running software close to stock and didn’t have the bloatware issue, we’d be talking about a legendary phone. One of the best phones ever made. Instead, we have some of the best hardware ever combined in a phone, with steaming pile of dung laid on top of it. Again, if Samsung finally broke free of Android, I think things would be very different. They might also be watching Huawei very closely to see how everything pans out for them. Huawei was forced off Android and now runs its own OS and ecosystem. If it goes well for Huawei, I would not be surprised to see Samsung finally pull the trigger. They already have the OS. It’s been in their Smart appliances for years. I know I’ve bashed Samsung a lot here, but there are some things that do that are excellent. The first one I’ll mention is something that falls into the useful category. It’s their side tabs. The default is your recent apps or apps you’ve pinned. This comes in handy since I don’t like either of Samsung’s default launcher options. You can also add more tabs like weather and select contacts. I first used this with the S6 Edge and I’m glad it’s still around. Now for the thing that Samsung does best, and by best, I mean no one is even close. A deep dive into the sound settings will take you to an EQ setting. This is not impressive on its own, since most other makers offer this. What Samsung does that no one else does, is it gives you a hearing test and creates a custom sound profile for you. As someone who has hearing loss, the impact this has is incredible. The only thing I don’t understand is why it’s so buried. I mean you need to dig to find this thing. I find it rather ironic that Samsung is more on board with Windows integration than any other maker I’ve used. Samsung imbedded the features needed and allows you to use apps in Windows. The others I’ve used require you to download an app and you cannot use apps in Windows. This is a handy feature to have for anyone using an Windows PC. They also support the cut and paste feature. Copy on your phone – paste on your PC and vice versa. I have to relate one final frustrating issue with Samsung’s software. The last three phones I used all were on board with Google’s autofill for apps. That made signing into a new phone an easy experience. Samsung has its own thing. I spent quite a while hunting down passwords that I hadn’t used in nearly two years. WILDCARD There is a factor to consider, if you’ve only used Apple or Samsung products. You’ve been spoiled. By buying the most popular phones, you’ve always had a massive selection of cases and accessories. As someone who’s been using the fringe players for years, I’ve been stuck with only a few choices when it comes to cases. Sometimes it was very difficult to find cases, or I had to pay more than I would have liked. Having a massive selection does add to the value, since you end up paying less for cases as everyone tries to undercut each other. On top of that, you can find the crazy cases that include extra battery, wallets, and added functionality. If you’re using a Sony or OnePlus, you can only dream about such a thing. This becomes even more of a value I you are one of the people in a program like Amazon Vine. I was able to get three cases for this phone, through Vine. Before this, only once was I able to find a case for my phone. Another factor is that there are also apps on the Play Store that are dedicated to tweaking the Samsung experience. Some of them are quite useful. This is something you don’t find when using the minor players. VALUE Is this phone a good value? No. I’m sorry at its retail price, it’s not. The LG V60 might have a weaker camera and older processor, but it’s a far better value. The OnePlus 9 Pro, is a slightly better value, if we are talking about a full priced phone. If you want this phone to be a value, you need to land this phone for $900 or less. Anything higher just isn’t worth it. If you’re going to pay full price for this phone, you might want to look at the iPhone. I do not like iOS, but they have an excellent build, great camera, no bloatware, and fast updates. SHOULD YOU BUY THIS PHONE If money is not an issue and you love Samsung – yes. If money is no issue and you want the best camera – yes. If money is no issue and you want the best Android phone – maybe. If money is an issue and you want a great Android phone – buy the LG V60. If you want a clean Android experience – buy the Pixel 5 or OnePlus 9 Pro. If money isn’t an issue and you want the best phone – buy the iPhone 12 Pro Max. If you need to have a sd card and headphones jack – buy the LG V60. If you need to have a sd card and headphones jack, but hate LGs software – buy the Sony Xperia 1 II.
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Reviewed in the United States on April 7, 2021 Reviewed in the United States on April 7, 2021 by A. Antonio
Color: Phantom Silver
Service provider: Unlocked
Memory Storage Capacity: 128.0 GB
Product grade: Renewed
Needed a phone, and upgraded to this one. Saved a good amount of money too. Was hesitant at first, but happy I went with this one. Absolutely no problems with the phone, everything works 100%. Has slight cosmetic wear, but thats to be expected with a refurbished item. 10/10 would buy another phone from here.
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Reviewed in the United States on January 3, 2026 by Brandon Moon
Color: Phantom Silver
Service provider: Unlocked
Memory Storage Capacity: 128.0 GB
Product grade: Renewed
Luv the phone it has the best camera on a phone I've ever had shots are clear and precise. Zoom is clear first time I've had a phone where the zoom is clear especially when taking pictures of birds it actually looks like one actually the Samsung Galaxy s21 ultra camera is by far better than the Samsung Galaxy s25
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Reviewed in the United States on March 15, 2026 by angelsrone
Color: Phantom Silver
Service provider: Unlocked
Memory Storage Capacity: 128.0 GB
Product grade: Renewed
The phone works but the burn in on the screen is bad, it's obvious that the screen wasn't replaced because you can still see the keyboard even when it's not pulled up. It casts a yellowish/orange tint across where the keyboard usually is.
Reviewed in the United States on May 6, 2026 by Stephanie Carberry