Display
Size:
5.5 inches
6.5 inches
6.5 inches
Resolution:
1920 x 1080 pixels, 16:9 ratio, 401 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
Technology:
IPS LCD
Super AMOLED
IPS LCD
Screen-to-body:
67.47 %
87.37 %
79.20 %
Peak brightness:
625 cd/m2 (nit)
Features:
Pressure-sensitive, Oleophobic coating, Scratch-resistant glass, Ambient light sensor, Proximity sensor
60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor
Hardware
System chip:
Apple A11 Bionic APL1W72
Samsung Exynos 9611
Mediatek Helio P35
Processor:
Hexa-core, 2390 MHz, Monsoon and Mistral, 64-bit, 10 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
GPU:
Apple 3-core GPU
Mali-G72 MP3
PowerVR GE8320
RAM:
3GB LPDDR4
4GB LPDDR4
3GB LPDDR4
Internal storage:
256GB, not expandable
128GB, available to use: 105.9 GB
32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion:
microSDXC up to 512 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
Smartphone
OS:
iOS (14.x, 13.x, 12.x, 11.x)
Android (10), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity:
2691 mAh
4000 mAh
4000 mAh
Type:
Li - Ion, Not user replaceable
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging:
USB Power Delivery, Qi wireless charging
Fast charging
Fast charging
Max charge speed:
Wired: 15.0W; Wireless: 7.5W
Wired: 15.0W
Camera
Rear:
Dual camera
Quad camera
Quad camera
Main camera:
12 MP (Sapphire crystal lens cover, OIS, PDAF, CMOS image sensor, BSI sensor)
48 MP (PDAF)
16 MP (PDAF)
Specifications:
Aperture size: F1.8; Focal length: 28 mm; Sensor size: 1/3"; Pixel size: 1.22 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Second camera:
12 MP (Telephoto, Sapphire crystal lens cover, PDAF, CMOS image sensor, BSI sensor)
12 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications:
Optical zoom: 2x; Aperture size: F2.8; Focal Length: 56 mm; Sensor size: 1/3.4"; Pixel size: 1 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
5 MP (Macro)
2 MP (Macro)
Specifications:
Aperture size: F2.4; Focal Length: 40 mm
Aperture size: F2.4
Fourth camera:
5 MP (Depth information)
2 MP (Depth information)
Specifications:
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4
Video recording:
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)
Features:
OIS, Time-lapse video, Continuous autofocus, Picture-taking during video recording, Video light, Video calling, Video sharing
Hyperlapse, EIS
Front:
7 MP (HDR)
32 MP (HDR)
13 MP
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.24 x 3.07 x 0.30 inches (158.4 x 78.1 x 7.5 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)
Weight:
7.13 oz (202.0 g)
6.07 oz (172.0 g)
6.81 oz (193.0 g)
Materials:
Back: Glass; Frame: Aluminum
Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic
Resistance:
Water, Dust; IP67
Biometrics:
Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Fingerprint (touch)
Keys:
Left: Volume control, Other; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Gold, Silver, Red, Space gray
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Black
Cellular
LTE (FDD):
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), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3)
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), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)
LTE (TDD):
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
UMTS:
850, 900, 1700/2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed:
LTE-A Cat 12/13 (600/150 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
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
Nano SIM
HD Voice:
Yes
Yes
VoLTE:
Yes
Multimedia
Headphones:
No 3.5mm jack
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Multiple speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Wireless screen share
Radio:
FM
FM
Additional microphone(s):
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth:
5.0
5.0
5.0
Wi-Fi:
802.11 a, b, g, n, ac, dual-band; MIMO, 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:
Lightning
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features:
Charging, Headphones port
Charging, OTG
Charging
Location:
GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Barometer
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Other:
NFC, UMA (Wi-Fi Calling)
NFC, ANT+
NFC
Hearing aid compatible:
M3, T4
M4, T3
Regulatory Approval
FCC approval:
Date approved:
Nov 28, 2019
Apr 17, 2020
Measured SAR:
Head:
0.89 W/kg
0.42 W/kg
Body:
1.18 W/kg
1.27 W/kg
Simultaneous Transmission:
1.56 W/kg
1.27 W/kg
Wireless Router:
1.12 W/kg
1.27 W/kg
Phablet:
2.76 W/kg
Buyers information
Price:
$ 949
$ 400
$ 250
User Manual:
This is the official Samsung Galaxy A51 User Guide in English provided from the manufacturer.
In The Box:
EarPods with Lighting connector, Lightning to 3.5mm headphone jack adapter, Lightning to USB Cable, USB Power Adapter, Documentation
This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.
Availability
Officially announced:
Sep 12, 2017
Dec 12, 2019
Apr 08, 2020
