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Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray

Rating 3.9 out of 5 stars with 222 reviews

Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray

Model: G991U
SKU: 6583364
$249.99
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Specifications
  • Screen Size
    6.2 inches
    Rear-Facing Camera
    12 megapixels
    Built-in Storage
    128 gigabytes
    Processor Model
    Qualcomm SM8350 Snapdragon 888
    Phone Memory (RAM)
    8 gigabytes
  • Key Specs
    • Screen Size: 6.2 inches (Size of the screen, measured diagonally from corner to corner.)
    • Rear-Facing Camera: 12 megapixels
    • Built-in Storage: 128 gigabytes
    • Processor Model: Qualcomm SM8350 Snapdragon 888 (Your computer's processor is like its brain. Working in combination with system memory, the power of the processor determines the complexity of software you can run, how many programs you can have open at the same time, and how fast those programs will run. Most computers feature an AMD, Intel or Snapdragon processor.)
    • 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: G991U
    • Product Name: Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked)
    • Color: Phantom Gray
  • Display
    • Screen Size: 6.2 inches (Size of the screen, measured diagonally from corner to corner.)
  • Camera
    • Integrated Camera: Front, Rear
    • Front-Facing Camera: 10 megapixels
    • Rear-Facing Camera: 12 megapixels
  • Network
    • Carrier: Unlocked
    • Network Connectivity: 4G LTE, 5G, CDMA, GSM (The manner in which a device sends data to another device over a long distance using a cellular network.)
  • Connectivity
    • Wireless Connectivity: Bluetooth, Wi-Fi (The manner in which a device sends data to another device over a short distance without the use of wires or cables.)
  • Power
    • Battery Capacity: 4000 milliampere hours (The amount of energy stored in the battery.)
    • Battery Chemistry: Lithium-ion
  • Features
    • Model Family: Samsung Galaxy S21 5G
    • Usage Time(s): Talk time up to 30 hours, Internet usage (LTE) time up to 14 hours, Internet usage (Wi-Fi) time up to 15 hours, Audio playback time up to 72 hours, Video playback time up to 19 hours (All battery claims depend on network configuration and many other factors; actual results will vary. Battery has limited recharge cycles and may eventually need to be replaced. Battery life and charge cycles vary by use and settings.)
    • Protective Qualities: Water resistant
    • Maximum Depth Of Water Resistance: 5 feet (Measurement of the maximum depth of water in which the product is able to resist some degree of water penetration.)
    • 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
  • Compatibility
    • SIM Card Size: Nano SIM
    • SIM Card Slots: Single SIM
  • 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 Model: Qualcomm SM8350 Snapdragon 888 (Your computer's processor is like its brain. Working in combination with system memory, the power of the processor determines the complexity of software you can run, how many programs you can have open at the same time, and how fast those programs will run. Most computers feature an AMD, Intel or Snapdragon processor.)
    • 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: 5.97 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: 2.8 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: 0.31 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: 5.96 ounces (The out of box weight of the item.)
  • Certifications Listings & Approvals
    • EPEAT Qualified: false (The Electronic Product Environmental Assessment Tool (EPEAT) was designed to provide an environmental assessment tool for purchasers. In order to qualify for EPEAT, a product must meet all 23 required criteria.)
  • Warranty
    • Warranty - Parts: 90 days limited
    • Warranty - Labor: 90 days limited
  • Other
    • UPC: 647056422051

The Galaxy S21 is the phone for business that lets you securely connect and collaborate anywhere. Discover new ways to collaborate with an impressive 8K camera and easily go from mobile to desktop to meetings with Samsung DeX. Keep your business data and personal information protected with a secure processor, Samsung Knox and the Knox portfolio. Work seamlessly in the way that works best for you with Microsoft and Link to Windows. Now you can easily optimize cellular and Wi-Fi connectivity by accessing the best network and plan at the moment, and stop paying more than necessary with monthly plans. Unlocked by Samsung smartphones work on most major U.S. networks and allow international business travelers to take advantage of lower local rates. When you get an Unlocked by Samsung smartphone, it has no pre-loaded carrier apps, so your organization can deliver a more predictable and consistent experience across devices and have greater freedom to customize device software. Inspiration is a fickle creature. The Galaxy S21’s intuitive camera lets you capture, share and collaborate in real time, no matter where you are. Be in front of the camera, behind the camera or both at the same time—Director’s View puts a whole new spin on the virtual tour. Connect all your devices with Wireless Samsung DeX and use your Galaxy S21 as the remote. Take conference calls on your TV, drag and drop files from your phone to PC or double your screens with the tap of a finger. The Galaxy S21 comes with a defense-grade security platform built in so you can rest easy. With multiple layers of protection, your device is safe from intrusion, malware and malicious threats. Keep your fleet of mobile devices in sync and in control from end to end. A complete set of cloud-based solutions eliminates the risk of user error for worry-free security, software updates, device setup and more. Part of Knox’s multi-layered security platform, the Galaxy S21’s Knox Vault is dedicated to protecting your PIN, password, pattern and Blockchain Private Key. And with biometric authentication, your private data stays private. Getting work done on your smartphone is more important than ever before. The Galaxy S21 comes integrated with Microsoft Office, OneDrive and Teams so you can easily access all your files, photos and reminders—whether you’re in the office, working from home or on the move.

  • Excellent Condition Pre-Owned Phone: Pre-owned products in excellent condition are inspected and verified to function properly with some cosmetic blemishes. May not include all parts and accessories. Comes in non-original packaging with a data cable.
  • Network compatibility: Compatible with all major U.S. carriers, such as Verizon, AT&T, Sprint, and T-Mobile. Also works with prepaid carriers, including but not limited to: Cricket Wireless, Boost Mobile, Metro by T-Mobile, Simple Mobile, Total Wireless, Tracfone, Net10, Mint, Ultra, and H2O.
  • Display: 6.7-inch LTPO Super Retina XDR OLED w/ Ceramic Shield glass, Resolution 1290 x 2796 pixels
  • Memory: 1TB 8GB RAM
  • Camera: Main (Triple) 48 MP + 12 MP + 12 MP w/ Dual-LED dual-tone flash, HDR (photo/panorama) -- Selfie 12 MP w/ HDR, Cinematic mode (4K@24/30fps)
  • Operating system: iOS 17 -- Apple A17 Pro -- Hexa-core (2x3.78 GHz + 4) -- Apple GPU (6-core graphics)
  • Battery: Li-Ion 4422 mAh, non-removable
  • Dimensions: 6.30 x 3.02 x 0.33 in, 7.80 oz
Whats Included
  • Pre-Owned Galaxy S21 5G 128GB (Unlocked)
Disclaimers
  • SIM card not included

Q: Does this phone have 5G or not? It says 5G in the title, but the best buy spec sheet says 4g and LTE. However when i take the model number of this phone and key it into the internet, I see other place where it says this model G991U DOES have 5G. ???

A: Hey there BrianDP, thank you for finding the free time out of your busy day to ask us your question about the Samsung Galaxy S21 5G. The advertised Galaxy S21 5G is a 5G enabled device that also works with the 2G, 3G, 4G, and 4G LTE wireless networks when the absence of 5G connectivity occurs. Feel free to reach out to Samsung Support if you have any additional questions for us. Thank you for being a valued Samsung customer. - Debra

Q: Is this phone compatible for T-Mobile?

A: If it's actually unlocked it would be. Mine came locked and was unusable. It was set to AT&T.

Q: Does the Samsung Galaxy S21 have wifi calling

A: Yes - my S21 5G has wifi calling

Q: What condition is this phone in?

A: Mine came in good condition but it was not unlocked. A total hassle.

Q: Do the pre-owned Galaxy phones have new batteries?

A: The batteries are not new, but they are tested for a minimum of 80% of battery life.

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Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray
Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray

The Galaxy S21 is the phone for business that lets you securely connect and collaborate anywhere. Discover new ways to collaborate with an impressive 8K camera and easily go from mobile to desktop to meetings with Samsung DeX. Keep your business data and personal information protected with a secure processor, Samsung Knox and the Knox portfolio. Work seamlessly in the way that works best for you with Microsoft and Link to Windows. Now you can easily optimize cellular and Wi-Fi connectivity by accessing the best network and plan at the moment, and stop paying more than necessary with monthly plans. Unlocked by Samsung smartphones work on most major U.S. networks and allow international business travelers to take advantage of lower local rates. When you get an Unlocked by Samsung smartphone, it has no pre-loaded carrier apps, so your organization can deliver a more predictable and consistent experience across devices and have greater freedom to customize device software. Inspiration is a fickle creature. The Galaxy S21’s intuitive camera lets you capture, share and collaborate in real time, no matter where you are. Be in front of the camera, behind the camera or both at the same time—Director’s View puts a whole new spin on the virtual tour. Connect all your devices with Wireless Samsung DeX and use your Galaxy S21 as the remote. Take conference calls on your TV, drag and drop files from your phone to PC or double your screens with the tap of a finger. The Galaxy S21 comes with a defense-grade security platform built in so you can rest easy. With multiple layers of protection, your device is safe from intrusion, malware and malicious threats. Keep your fleet of mobile devices in sync and in control from end to end. A complete set of cloud-based solutions eliminates the risk of user error for worry-free security, software updates, device setup and more. Part of Knox’s multi-layered security platform, the Galaxy S21’s Knox Vault is dedicated to protecting your PIN, password, pattern and Blockchain Private Key. And with biometric authentication, your private data stays private. Getting work done on your smartphone is more important than ever before. The Galaxy S21 comes integrated with Microsoft Office, OneDrive and Teams so you can easily access all your files, photos and reminders—whether you’re in the office, working from home or on the move.

Samsung - Pre-Owned Excellent Galaxy S21 Ultra 5G 128GB (Unlocked) - Phantom Black
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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.

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The only glare you'll get now is from jealous strangers. Enjoy high outdoor visibility and a crystal-clear view in bright daylight or at night with adaptive 120Hz Infinity-O Displays equipped with Vision Booster tech. Make nighttime pics and videos come out clear as day with the epic upgrades to our Pro-grade Camera: a big pixel sensor that pulls in tons of light and Super Clear Glass to dial down lens flare. Get epic low-light portraits and selfies thanks to all-new upgrades to the Rear Camera and Selfie Camera, each capturing more light for incredible color and detail. Live Sharing with Google Duo lets you co-watch YouTube videos and content with the whole gang from anywhere. You can even cast it onto your TV to see everyone all at once. Give your night videos the big TV break they deserve. Use Smart View to cast to your TV and either mirror your phone, or keep using other apps without interrupting the show. Seamlessly connect your phone and computer and use your favorite mobile apps right on your Windows PC. Accomplish more and keep the collaboration going wherever your business takes you with the next-level integration of both Microsoft and Google cloud productivity tools. Switch up the view with an even bigger screen, or use both devices at once for even more space to create. Your Samsung Account makes it seamless to continue edits from one Galaxy to another, so you can start something on your phone and finish on Galaxy Tab S8+. Whether you're vlogging your day, gaming all night or simply scrolling your feed, the 4nm processor makes for an incredibly smooth experience. Worry less with Corning® Gorilla® Glass Victus®+ on the screen and back panels and a polished, protective Armor Aluminum frame. Plus, with its IP68 water resistance rating, it can take a splash, too. Secure your private data from the second you turn your phone on with Samsung Knox. Knox Vault helps keep your biometric information safe, while Secure Folder locks down your private data. And the new Permission Usage dashboard lets you see which apps are sharing your data or tracking you, and allows you to grant or deny access on your terms.

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Galaxy A16 5G delivers an awesome experience at an awesome value, bringing you everything you need at a great price. Stream your favorite shows on its large 6.7” display, enjoy smooth performance across all your apps and capture life’s special moments in detail with the triple-lens camera. Power through your day with a reliable Super Fast Charging battery, and stay connected to your family and friends with ultrafast 5G. Enjoy all the awesome perks that come with an A Series phone including Samsung Wallet, Samsung TV Plus and partner offers like three months of free Peacock Premium. Plus, with six years of OS and security updates, your phone helps keep you protected and up to date. Bring home a phone that delivers incredible value and makes your everyday a little easier.

Pros for Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray
Overall Performance, Condition, Camera Quality, Battery Life, SizeOverall Performance, Camera Quality, Condition, Battery Life, SpeedThere were no pros for this productOverall Performance, Camera Quality, Battery Life, Ease of Use, Screen Size
Cons for Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray
Heat Dissipation, FunctionalityThere were no cons for this productThere were no cons for this productHeat Dissipation, Processor Speed, RAM, Connectivity

Specs

Reviews

Customers are saying

Customers highly value the overall performance, condition, and camera quality of the Pre-Owned Excellent Galaxy S21 5G. Many find the phone to be in great condition and appreciate the exceptional camera quality. Some customers have reported issues with cellphone signal and overheating. However, positive feedback regarding battery life and size has also been noted.

This summary was generated by AI based on customer 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

    Samsung S21 5G Pre-owned

    I bought this phone for a friend who needed a second one for personal use besides her work phone and did not want to spend a lot of money for a new phone yet. It looks like brand new no dents, no scratches anywhere on the phone. Front display is perfect, sides of the phone and back of it are perfect. Turns on perfectly with no issues on Google, Samsung, or Android. Cameras work great both front & back. I tested it before gifting it to my friend and haven't heard any complains from her yet. Phone has a screen proctector.

    This review is from Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray

    MrBlueOP Posted

  • Rated 4 out of 5 stars

    Mixed Opinion on my purchase but overall still hap

    When i bought the phone online it said "unlocked" but when i picked it up and opened it it said t mobile maybe because i got an open box phone but i still enjoy the phone it was clean and barley had no marks not even a spec best buy is a reliable source of sorts but kinda dissapointed that it wasent unlocked but love the phone anyways four starts :D (as you can see in the picture i can not uninstall the hope making me to believe its locked and when i turn on the phone it does the same thing pink t mobile logo !)

    This review is from Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray

    SamretheanyY Posted

  • Rated 4 out of 5 stars

    Love it

    This phone works great! I love the camera and the display. Gave a photo for camera quality example.

    This review is from Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray

    ToriD Posted

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