Display
Size:
6.0 inches
6.5 inches
6.4 inches
Resolution:
2220 x 1080 pixels, 18.5:9 ratio, 411 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
Technology:
Super AMOLED
Super AMOLED
Super AMOLED
Screen-to-body:
75.31 %
87.37 %
83.97 %
Peak brightness:
420 cd/m2 (nit)
Features:
Ambient light sensor, Proximity sensor
60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 450 SDM450
Samsung Exynos 9611
Exynos 9611
Processor:
Octa-core, 1800 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
GPU:
Adreno 506
Mali-G72 MP3
Mali-G72 MP3
RAM:
3GB LPDDR3
4GB LPDDR4
6GB LPDDR4
Internal storage:
32GB, available to use: 22.4 GB
128GB, available to use: 105.9 GB
64GB (UFS 2.1), available to use: 49 GB
Storage expansion:
microSDXC up to 256 GB
microSDXC up to 512 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
Smartphone
OS:
Android (9.0 Pie, 8.0 Oreo), Samsung One UI
Android (10), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity:
3500 mAh
4000 mAh
6000 mAh
Type:
Li - Ion, Not 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:
Dual camera
Quad camera
Quad camera
Main camera:
16 MP (PDAF)
48 MP (PDAF)
64 MP (PDAF)
Specifications:
Aperture size: F1.7; Focal length: 26 mm; Sensor size: 1/2.8"; Pixel size: 1.12 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Second camera:
5 MP (Depth information)
12 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications:
Aperture size: F1.9; Focal Length: 24 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
5 MP (Macro)
5 MP (Macro)
Specifications:
Aperture size: F2.4; Focal Length: 40 mm
Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Fourth camera:
5 MP (Depth information)
5 MP (Depth information)
Specifications:
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2
Video recording:
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features:
Video calling, Video sharing
Hyperlapse, EIS
Hyperlapse, EIS
Front:
24 MP (Flash)
32 MP (HDR)
32 MP (HDR, Slow-motion videos)
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.31 x 2.98 x 0.31 inches (160.2 x 75.7 x 7.9 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
Weight:
6.74 oz (191.0 g)
6.07 oz (172.0 g)
6.74 oz (191.0 g)
Materials:
Back: Metal
Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic
Biometrics:
2D Face unlock, Fingerprint (touch)
2D Face unlock, In-screen fingerprint
2D Face unlock, Fingerprint (touch)
Keys:
Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Black, Gold, Lavender, Blue
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Blue, Black, Red
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), 14(700 PS), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 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), 26(850+), 28(700 APT), 66(AWS-3)
LTE (TDD):
Bands 38(2600), 40(2300)
Bands 38(2600), 39(1900+), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
UMTS:
850, 900, 1900, 2100 MHz
850, 900, 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
LTE-A, 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:
Nano SIM
Nano SIM
Nano SIM
VoLTE:
Yes
Multimedia
Headphones:
3.5mm jack
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Dolby Atmos, Album art cover, Background playback
Dolby Atmos
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Wireless screen share
Radio:
FM, RDS, Recording option
FM
FM
Additional microphone(s):
for Noise cancellation
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth:
4.2, EDR
5.0
5.0
Wi-Fi:
802.11 a, b, g, n, dual-band; Wi-Fi Direct, Hotspot
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:
Charging, Mass storage device
Charging, OTG
Charging
Location:
GPS, A-GPS, Glonass, BeiDou
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Other:
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync
NFC, ANT+
NFC
Regulatory Approval
FCC approval:
Date approved:
Apr 07, 2018
Nov 28, 2019
Feb 07, 2020
Measured SAR:
Head:
0.24 W/kg
0.89 W/kg
0.42 W/kg
Body:
0.97 W/kg
1.18 W/kg
0.41 W/kg
Simultaneous Transmission:
1.33 W/kg
1.56 W/kg
1.54 W/kg
Wireless Router:
1.05 W/kg
1.12 W/kg
0.74 W/kg
Phablet:
1.96 W/kg
2.76 W/kg
Buyers information
Price:
$ 400
€ 240
User Manual:
This is the official Samsung Galaxy A51 User Guide in English provided from the manufacturer.
This is the official Samsung Galaxy M31 User Guide in English provided from the manufacturer.
In The Box:
Charger, microUSB cable, Headphones, Quick Start Guide
15W fast charger, Data cable, Ejection pin, User Manual
Availability
Officially announced:
May 02, 2018
Dec 12, 2019
Feb 25, 2020