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Samsung Galaxy S21 smartphone in Phantom Gray finish with triple rear cameras

SAMSUNG

SAMSUNG SM-G991UZAEXAA Galaxy S21 5G 6.2" Phantom Gray 8GB RAM cell phones - unlocked

SKU CH-EJS3-V285B MPN SM-G991UZAEXAA

Unlocked 5G smartphone with a 6.2-inch 120 Hz Dynamic AMOLED 2X display, triple 64 MP rear camera system and 8K video capture

  • Technology5G
  • Bands & FrequenciesCDMA: 800, 1900 MHz / GSM: 850, 900, 1800, 1900 Mhz / LTE: B
  • Form FactorSmart Phones
  • ColorPhantom Gray
  • SIM Card TypeNano SIM
  • SensorsAccelerometer, Barometer, Fingerprint Sensor, Gyro Sensor, G

RAM 8GB

Storage 256GB

  • 128GB
  • 256GB

Option S21

  • S21
  • S21 Ultra
  • S21+

Struck-through versions exist but are not stocked here.

  • 2" Dynamic AMOLED 2X at 120Hz for smooth visuals
  • Triple 64 MP rear camera captures detailed portraits
  • Hybrid optic 3x zoom brings distant subjects closer
  • 8K video recording delivers cinema-style quality
  • Fingerprint sensor integrated for secure unlocking

Unlocked 5G Smartphone

The Samsung Galaxy S21 SM-G991UZAEXAA is an unlocked 5G smartphone with a 6.2 inch Dynamic AMOLED 2X display running at 120Hz. It ships new in Phantom Gray with 8GB of RAM and a triple rear camera system rated at 64 MP, 12 MP and 12 MP. The handset supports a wide range of CDMA, GSM and LTE bands for broad carrier compatibility.

Best for single-SIM users wanting 8K video

Buyers who need a Nano SIM slot, 8K video capture at 2400 x 1080 resolution, and a 10 MP front-facing camera will find this model fits. Hybrid Optic Zoom at 3x and digital zoom up to 30x suit photography enthusiasts. Users requiring dual SIM support, expandable storage or a headphone jack should consider other devices.

Simple setup with SIM insertion

Activation requires inserting a Nano SIM and following the on-screen carrier setup. The in-display fingerprint sensor and face recognition configure quickly for biometric unlock. Common issues include forgetting to enable 5G in network settings after activation and overlooking the Zoom Lock toggle for stable telephoto shots.

Highlights

  • 2" Dynamic AMOLED 2X at 120Hz for smooth visuals
  • Triple 64 MP rear camera captures detailed portraits
  • Hybrid optic 3x zoom brings distant subjects closer
  • 8K video recording delivers cinema-style quality
  • Fingerprint sensor integrated for secure unlocking

Specifications

BrandSamsung
ModelGalaxy S21
Part NumberSM-G991UZAEXAA
Technology5G
Bands & FrequenciesCDMA: 800, 1900 MHz / GSM: 850, 900, 1800, 1900 Mhz / LTE: Band 1 / LTE: Band 12 / LTE: Band 13 / LTE: Band 14 / LTE: Band 18 / LTE: Band 19 / LTE: Band 2 / LTE: Band 20 / LTE: Band 25 / LTE: Band 26 / LTE: Band 28 / LTE: Band 3 / LTE: Band 30 / LTE: Band 38 / LTE: Band 39 / LTE: Band 4 / LTE: Band 40 / LTE: Band 41 / LTE: Band 46 / LTE: Band 48 / LTE: Band 5 / LTE: Band 66 / LTE: Band 7 / LTE: Band 71 / LTE: Band 8
Form FactorSmart Phones
ColorPhantom Gray
SIM Card TypeNano SIM
SensorsAccelerometer, Barometer, Fingerprint Sensor, Gyro Sensor, Geomagnetic Sensor, Hall Sensor, Light Sensor, Proximity Sensor
Touch ScreenYes
Main Display Size6.2"
Main Display Resolution2400 x 1080
Main Display Color16M
Main Display FormatDynamic AMOLED 2X, 120Hz
Rear CameraTriple: 64 MP + 12 MP + 12 MP
Camera ZoomHybrid Optic Zoom at 3x , Digital Zoom up to 30x
FlashLED
HD Video Capture8K
Auto FocusYes
Front-Facing Camera10 MP
Operating SystemAndroid 11
System ChipQualcomm Snapdragon 888
Processor CoreOcta-core
Processor Speed2.84 GHz, 2.4 GHz, 1.8 GHz
RAM8GB
Storage256GB
Wi-Fi Support802.11 a/b/g/n/ac/ax 2.4G+5GHz, HE80, MIMO, 1024-QAM
ConnectivityYes
USBUSB Type-C USB 3.2 Gen 1
Audio ConnectorsUSB Type-C
Bluetooth SupportBluetooth v5.0
Other ConnectionNFC
Battery Capacity4000mAh
Talk TimeUp to 30 hours
Operating TimeInternet Usage Time (LTE): Up to 14 Hours
Internet Usage Time (Wi-Fi): Up to 15 Hours
Audio Playback Time (Wireless): Up to 72 Hours
Video Playback Time (Wireless): Up to 19 Hours
GPS IntegratedGPS, Glonass, Galileo
Additional FunctionWi-Fi/GPS/NFC
SpecificationsCorning Gorilla Glass Victus
IP68
FeaturesContour Cut Camera Design
The real metal finish on the main camera adds unity to the design and accentuates the luxury of the haze texture. It's an iconic new camera design made to turn heads.
High Resolution
Get amazingly clear, high-quality photos with the large 64MP sensor. Even in dark situations, it takes in plenty of light to get the rich image quality. It's all in the details.
Space Zoom
With Hybrid Optic Zoom and enhanced Super Resolution you can zoom up to 30X with clarity and precision. And the new Zoom Lock helps stabilize your shots.
8K Video
Get cinema quality video in t
Dimensions (H x W x D)5.97" x 2.80" x 0.31"
Weight5.96 oz.
Package ContentsGalaxy S21 5G
C to C Data Cable
Ejection Pin
Shipping weight0.45 kg
Package size229 × 152 × 76 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the phone need a Nano SIM card to connect to 5G and LTE networks?

Yes, it uses a Nano SIM and supports 5G plus LTE bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66 and 71.

Will my existing CDMA or GSM SIM work in this unlocked model?

The handset accepts CDMA 800 and 1900 MHz and GSM 850, 900, 1800 and 1900 MHz, so a compatible Nano SIM from those networks will work.

How can I check the 120 Hz Dynamic AMOLED 2X screen is running at full refresh rate?

Open Settings, tap Display, then Motion smoothness and confirm Adaptive 120 Hz is selected.

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