Display
Size:
5.5 inches
6.5 inches
Resolution:
2160 x 1080 pixels, 18:9 ratio, 439 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
Technology:
IPS LCD
IPS LCD
Screen-to-body:
78.31 %
79.20 %
Features:
Scratch-resistant glass, Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 450 SDM450
Mediatek Helio P35
Processor:
Octa-core, 1800 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
GPU:
Adreno 506
PowerVR GE8320
RAM:
4GB LPDDR3
3GB LPDDR4
Internal storage:
64GB, available to use: 49 GB
32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion:
microSDXC up to 2000 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (9.0 Pie, 8.1 Oreo)
Android (10), Samsung One UI
Battery
Capacity:
3000 mAh
4000 mAh
Type:
Li - Ion, Not user replaceable
Li - Polymer, Not user replaceable
Charging:
MediaTek Pump Express
Fast charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Single camera
Quad camera
Main camera:
16 MP (PDAF)
16 MP (PDAF)
Specifications:
Aperture size: F2.2; Sensor size: 1/3"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Second camera:
8 MP (Ultra-wide)
Specifications:
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
2 MP (Macro)
Specifications:
Aperture size: F2.4
Fourth camera:
2 MP (Depth information)
Specifications:
Aperture size: F2.4
Video recording:
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)
Features:
Picture-taking during video recording, Video light, Video calling, Video sharing
Front:
8 MP (HDR)
13 MP
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
5.66 x 2.73 x 0.33 inches (143.8 x 69.3 x 8.4 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)
Weight:
5.11 oz (145.0 g)
6.81 oz (193.0 g)
Materials:
Back: Plastic; Frame: Plastic
Resistance:
Water, Dust; IP68; MIL-STD-810 certified
Biometrics:
2D Face unlock, Fingerprint (touch)
Fingerprint (touch)
Features:
Notification light
Keys:
Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Blue
Black
Cellular
LTE (FDD):
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 13(700 c), 20(800 DD), 66(AWS-3), 71(600)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)
LTE (TDD):
Bands 38(2600), 41(2600+)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
UMTS:
850, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed:
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type:
Nano SIM
Nano SIM
HD Voice:
Yes
Yes
VoLTE:
Yes
Multimedia
Headphones:
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Album art cover, Background playback
Screen mirroring:
DLNA, Wireless screen share
Wireless screen share
Radio:
FM
FM
Additional microphone(s):
for Noise cancellation
Connectivity & Features
Bluetooth:
4.2
5.0
Wi-Fi:
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB:
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features:
Mass storage device, OTG, Charging
Charging
Location:
GPS, A-GPS
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
Other:
NFC, UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync
NFC
Hearing aid compatible:
M4, T3
M4, T3
Regulatory Approval
Measured SAR:
Head:
0.36 W/kg
0.42 W/kg
Body:
1.10 W/kg
1.27 W/kg
Simultaneous Transmission:
1.46 W/kg
1.27 W/kg
Wireless Router:
1.30 W/kg
1.27 W/kg
Buyers information
Price:
$ 250
In The Box:
This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.
Availability
Officially announced:
May 21, 2018
Apr 08, 2020
