Phone specs

Samsung Galaxy S21 5G

Recognized by Device Info o1s SM-G991B
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Exynos 2100Chipset
8 GBRAM
128 GBStorage
Android 15One UI 7.0

Variants seenFrom owners who shared this model

RAM

8 GBSeen

Storage

128 GBSeen

Android

15Seen

Chipset

Samsung Exynos 2100

Samsung Exynos 2100 · 5 nm Samsung

Prime 2.91GHz Cortex-X1 1 core
Performance 2.81GHz Cortex-A78 3 cores
Efficiency 2.21GHz Cortex-A55 4 cores
CPU cores
8
GPU
Mali-G78
Memory
LPDDR5 3200 MHz
Vulkan / OpenGL ES
1.1 / 3.2
ABIs
arm64-v8a, armeabi, armeabi-v7a
Chip details and devices using it →

Device

Brand
Samsung
Manufacturer
samsung
Model numbers
SM-G991B
Codename
o1s
Board
exynos2100
Hardware
exynos2100
Released with
Android 11

System

Android
15 (API 35)
UI
One UI 7.0
Security patch
January 2026
Kernel
5.4.242
Project Treble
Supported
Seamless updates
No
Dynamic partitions
Supported
Widevine DRM
L1
Max HDCP
2.2

Display

Size
6.2 in
Resolution
1080 × 2400
Pixel density
423 ppi
Aspect ratio
20:9
Screen density
540 dpi
Refresh rate
48–120 Hz
HDR
HDR10, HDR10+, HLG
Wide color gamut
Supported

Battery

Capacity
3,880 mAh
Technology
Li-ion

Capacity is estimated from what the phone reports to Android, so on some phones it can differ from the advertised capacity.

Cameras

Back12.2 MP

4032 × 3024 · 5.4 mm

f/1.8 · OIS

Back12.2 MP

4032 × 3024 · 2.2 mm

f/2.2

Front10 MP

3648 × 2736 · 3.3 mm

f/2.2

Front7.1 MP

3216 × 2208 · 3.3 mm

f/2.2

Megapixels are what Android reports to apps. Many phones combine pixels by default, so the camera's advertised megapixels can be higher.

ConnectivityWi-Fi 6

–6 GHz Wi-Fi
✓5 GHz Wi-Fi
✓Wi-Fi Direct
✓Bluetooth
✓Bluetooth LE
–LE Audio
✓NFC
–Secure NFC
–UWB
✓USB host

Sensors44 sensors

  • Magnetic field AK09918C Magnetometer · AKM
  • Magnetic field uncalibrated AK09918C Uncalibrated Magnetometer · AKM
  • Device orientation AutoRotation Sensor · Samsung Electronics
  • Com.samsung.sensor.call gesture Call Gesture · Samsung Electronics
  • Game rotation vector Game Rotation Vector · Samsung Electronics
  • Gravity Gravity Sensor · Samsung Electronics
Show all sensors ▾
  • Com.samsung.sensor.grip reset notifer Grip Notifier Sensor · Virtual
  • Com.samsung.sensor.hallIC Hall IC · Samsung Electronics
  • Com.samsung.sensor.grip ISG5320A Grip sensor · IMAGIS
  • Pressure LPS22HHTR Barometer · STM
  • Accelerometer LSM6DSO Accelerometer · STM
  • Gyroscope LSM6DSO Gyroscope · STM
  • Com.samsung.sensor.interrupt gyro LSM6DSO Interrupt Gyroscope · STM
  • Accelerometer uncalibrated LSM6DSO Uncalibrated Accelerometer · STM
  • Gyroscope uncalibrated LSM6DSO Uncalibrated Gyroscope · STM
  • Com.samsung.sensor.led cover event Led Cover Event · Samsung Electronics
  • Com.samsung.sensor.light seamless Light Seamless · Samsung Electronics
  • Linear acceleration Linear Acceleration Sensor · Samsung Electronics
  • Sensor Motion Sensor · Samsung Electronics
  • Com.samsung.sensor.move detector Move Nomove Detector · Samsung Eletronics
  • Orientation Orientation Sensor · Samsung Electronics
  • Proximity Palm Proximity Sensor version 2 · Samsung
  • Pick up gesture Pick Up Gesture · Samsung Electronics
  • Com.samsung.sensor.pocket mode Pocket Mode · Samsung Electronics
  • Com.samsung.sensor.sensorhubs SContext · Samsung
  • Rotation vector Samsung Rotation Vector · Samsung Electronics
  • Com.samsung.sensor.sar backoff motion SarBackoffMotion Sensor · Samsung Electronics
  • Com.samsung.sensor.seq step Sequential Step Sensor · Samsung Electronics
  • Com.samsung.sensor.shake tracker Shake Tracker · Samsung Electronics
  • Significant motion Significant Motion Sensor · Samsung Electronics
  • Step counter Step Counter Sensor · Samsung Electronics
  • Step detector Step Detector Sensor · Samsung Electronics
  • Com.samsung.sensor.light cct TMD4912 Light CCT · AMS
  • Com.samsung.sensor.light ir TMD4912 Light IR · AMS
  • Com.samsung.sensor.autobrightness TMD4912 Light · AMS
  • Com.samsung.sensor.proximity alert TMD4912 Proximity Raw · AMS
  • Com.samsung.sensor.physical proximity TMD4912 Proximity · AMS
  • Light TMD4912 Uncalibrated Light · AMS
  • Com.samsung.sensor.bio alc TSL2510 Rear ALS · AMS
  • Com.samsung.sensor.tap tracker Tap Tracker · Samsung Electronics
  • Com.samsung.sensor.thermistor Thermistor Sensor · Samsung Electronics
  • Tilt detector Tilt Detector · Samsung Electronics
  • Com.samsung.sensor.touch proximity Touch Proximity · Samsung Electronics
  • Com.samsung.sensor.wake up motion Wake Up Motion · Samsung Electronics

Other phones with Exynos 2100

Samsung Galaxy S21 Ultra 5G

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From phones shared with the Device Info app · updated October 2026 Hardware specs only. No personal data. Privacy