SAMSUNG
SAMSUNG Galaxy S21 5G AT&T Phantom Gray 128GB
An AT&T 5G smartphone with a 6.2" 120 Hz display, 64 MP rear camera, 8K video, 8 GB RAM and 128 GB storage
- TypeCell Phone
- Technology2G/3G/4G LTE/5G
- Form FactorSmart Phones
- ColorGray
- Touch ScreenYes
- Main Display Size6.2"
- 2 inch 120Hz display for smooth scrolling
- 64MP rear camera captures detailed photos
- 8K video recording with 33MP frame grabs
- Octa-core 2.8GHz processor with 8GB RAM for fast performance
- 128GB storage holds apps and media
Built for AT&T 5G
The Samsung Galaxy S21 5G SM-G991 arrives new and locked to AT&T in Phantom Gray. It targets users who want a flagship Android experience on a single carrier without a contract. The 6.2 inch Dynamic AMOLED 2X panel runs at 1080 x 2400 and a 120 Hz refresh rate. Gorilla Glass Victus protects the front and back.
Sustained everyday pace
An octa-core processor clocked at 2.8 GHz paired with 8 GB of RAM keeps multitasking smooth during long sessions. The 120 Hz display intelligently lowers its refresh rate to conserve power when static content is shown. Samsung rates the battery as all-day intelligent, meaning it adapts to usage patterns rather than draining at a fixed rate. Thermal throttling is managed by the vapor-chamber cooling system built into the chassis.
128 GB fixed storage
Internal capacity is 128 GB with no microSD slot, so buyers who need more space for 8K video or large app libraries must rely on cloud offload. The 64 MP triple rear camera records 8K at 24 fps and can extract 33 MP stills from footage. Single Take captures multiple formats with one shutter press. Front camera is 10 MP for selfies and video calls.
Highlights
- 2 inch 120Hz display for smooth scrolling
- 64MP rear camera captures detailed photos
- 8K video recording with 33MP frame grabs
- Octa-core 2.8GHz processor with 8GB RAM for fast performance
- 128GB storage holds apps and media
Specifications
| Brand | Samsung |
|---|---|
| Series | Samsung Galaxy S21 5G |
| Model | SM-G991 |
| Part Number | SM-G991 |
| Type | Cell Phone |
| Technology | 2G/3G/4G LTE/5G |
| Form Factor | Smart Phones |
| Color | Gray |
| Touch Screen | Yes |
| Main Display Size | 6.2" |
| Main Display Resolution | 1080 x 2400 |
| External Display Size | 6.2 |
| External Display Resolution | 1080 x 2400 |
| Rear Camera | 64 MP |
| Front-Facing Camera | 10 MP |
| Operating System | Android |
| Processor Core | Octa Core |
| Processor Speed | 2.8 |
| RAM | 8GB |
| Storage | 128GB |
| Connectivity | Yes |
| Wi-Fi Support | Yes |
| Bluetooth Support | Yes |
| Battery Type | Non-Removable Lithium Ion |
| Audio | Yes |
| Features | 3D Depth Camera, 4K Video Recording, 8K Video Recording, Accelerometer, Ambient Light Sensor, AMOLED Display, Barometer, Bluetooth Enabled, Camera, Facial Recognition, Fast Charging, Fast Wireless Charging, Fingerprint Sensor, Infinity-O Display, Laser AF Sensor, Proximity Sensor, Quad Rear Camera, Rugged, Telephoto Lens, Triple Rear Camera, Ultrasonic Fingerprint Sensor, Ultra Wide-Angle Camera, Wide-Angle Camera, Wireless Charging |
| Weight | 0.4 lb |
| 4G | LTE |
| CPU | Qualcomm SM8350 Snapdragon 888 5G |
Questions about this item
How warm does the Galaxy S21 5G get when the 120 Hz display and 2.8 GHz octa-core processor run all day?
The Dynamic AMOLED 2X panel adjusts its refresh rate intelligently, and the processor balances performance with efficiency, so the phone stays comfortable during extended use.
What charger and cable do I need to power the 128 GB Phantom Gray model out of the box?
The handset uses USB-C Power Delivery; any certified USB-C charger and cable will charge the 128 GB unit, but no charger is included in the package.
Will my existing nano-SIM and microSD cards work with the SM-G991 on AT&T's 5G network?
The SM-G991 accepts a single nano-SIM for AT&T 5G service; it does not have a microSD slot, so the 128 GB internal storage is fixed.
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