
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.
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 this phone have a micro SD card slot?
A: undefined
Q: Does this phone uses SIM card? Can I use the phone when I travel to another country?
A: Yes uses normal SIM card
Q: Does the Samsung Galaxy S21 have wifi calling
A: Yes - my S21 5G has wifi calling
A: undefined
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.

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.

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.

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.

Introducing moto g stylus 5G - 2024, with a new stylus that takes expression to another level. Jot notes, edit photos, sketch artwork, and navigate effortlessly with even faster responsiveness. Experience cinema-quality entertainment on the 6.7" pOLED display backed by Dolby Atmos sound. Capture sharper photos and smoother videos with the 50MP Ultra Pixel camera system featuring OIS. And have plenty of power when inspiration strikes thanks to a 5000mAh battery and ultra-fast TurboPower charging. Wherever you go, you’ll make a statement with a standout design featuring vegan leather. And with tons of storage, you’ll have room for all your favorite content and creations. Express yourself like never before with moto g stylus 5G.
| Pros for Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray | |||
|---|---|---|---|
| Overall Performance, Condition, Camera Quality, Battery Life, Size | There were no pros for this product— | Overall Performance, Condition, Camera Quality, Battery Life, Size | Overall Performance, Camera Quality, Battery Life, Stylus, Processor Speed |
| Cons for Samsung - Pre-Owned Excellent Galaxy S21 5G 128GB (Unlocked) - Phantom Gray | |||
| Functionality, Heat Dissipation | There were no cons for this product— | Functionality, Heat Dissipation | Software Updates |
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.
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.
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.
MrBlueOP Posted
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 !)
SamretheanyY Posted
This phone works great! I love the camera and the display. Gave a photo for camera quality example.
ToriD Posted