Display
Size:
5.5 inches
6.5 inches
6.5 inches
Resolution:
1280 x 720 pixels, 267 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
Technology:
Super AMOLED
IPS LCD
Super AMOLED
Screen-to-body:
69.72 %
79.20 %
87.37 %
Colors:
16 777 216
Touchscreen:
Capacitive, Multi-touch
Features:
Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor
60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 615 8939
Mediatek Helio P35
Samsung Exynos 9611
Processor:
Octa-core, 1500 MHz, ARM Cortex-A53, 64-bit
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
GPU:
Adreno 405
PowerVR GE8320
Mali-G72 MP3
RAM:
1.5GB LPDDR3
3GB LPDDR4
4GB LPDDR4
Internal storage:
16GB, available to use: 11.6 GB
32GB (eMMC 5.1), available to use: 19.8 GB
128GB, available to use: 105.9 GB
Storage expansion:
microSDXC up to 128 GB
microSDXC up to 512 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
Smartphone
OS:
Android (6.0 Marshmallow, 5.1 Lollipop)
Android (10), Samsung One UI
Android (11, 10), Samsung One UI
Battery
Capacity:
3000 mAh
4000 mAh
4000 mAh
Type:
User replaceable
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging:
Fast charging
Fast charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Single camera
Quad camera
Quad camera
Main camera:
13 MP (Autofocus)
16 MP (PDAF)
48 MP (PDAF)
Specifications:
Aperture size: F1.9; Focal length: 28 mm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera:
8 MP (Ultra-wide)
12 MP (Ultra-wide)
Specifications:
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Third camera:
2 MP (Macro)
5 MP (Macro)
Specifications:
Aperture size: F2.4
Aperture size: F2.4; Focal Length: 40 mm
Fourth camera:
2 MP (Depth information)
5 MP (Depth information)
Specifications:
Aperture size: F2.4
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Video recording:
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
Features:
Video calling
Hyperlapse, EIS
Front:
5 MP (Flash)
13 MP
32 MP (HDR)
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.00 x 3.09 x 0.30 inches (152.4 x 78.6 x 7.5 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
Weight:
6.03 oz (171.0 g)
6.81 oz (193.0 g)
6.07 oz (172.0 g)
Materials:
Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic
Biometrics:
Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Features:
Touch sensitive control keys
Keys:
Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Black, Gold, White
Black
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Cellular
LTE (FDD):
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
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)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
LTE (TDD):
Bands 40(2300)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)
UMTS:
Bands 5(850), 8(900), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Data Speed:
LTE, HSPA
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM:
Yes
SIM type:
Micro SIM
Nano SIM
Nano SIM
HD Voice:
Yes
Multimedia
Headphones:
3.5mm jack
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Album art cover, Background playback
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Wireless screen share
Radio:
FM, RDS
FM
FM
Additional microphone(s):
for Noise cancellation
Connectivity & Features
Bluetooth:
4.1
5.0
5.0
Wi-Fi:
802.11 b, g, n; Hotspot, Wi-Fi Direct
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:
microUSB, USB 2.0
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features:
Mass storage device, Charging
Charging
Charging, OTG
Location:
GPS, A-GPS, Glonass
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other:
ANT+
NFC
NFC, ANT+
Hearing aid compatible:
M4, T3
Phone features
Notifications:
Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Other features:
Voice dialing, Voice commands, Voice recording
Regulatory Approval
FCC approval:
Date approved:
Apr 17, 2020
Nov 28, 2019
Measured SAR:
Head:
0.42 W/kg
0.89 W/kg
Body:
1.27 W/kg
1.18 W/kg
Simultaneous Transmission:
1.27 W/kg
1.56 W/kg
Wireless Router:
1.27 W/kg
1.12 W/kg
Phablet:
2.76 W/kg
Buyers information
Price:
$ 234
$ 250
$ 400
User Manual:
This is the official Samsung Galaxy A51 User Guide in English provided from the manufacturer.
In The Box:
This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.
Availability
Officially announced:
Jul 16, 2015
Apr 08, 2020
Dec 12, 2019
