Samsung Galaxy A51 Vs Samsung Galaxy A31 Specs Comparison


Samsung Galaxy A51 is equipped with Exynos 7 Octa 9611 SoC, 4 GB or 6 GB RAM, 64 GB or 128 GB storage, 6.5" Super AMOLED display, 4000 mAh battery with 15 W fast charging, quad rear camera with 48 MP main sensor + 12 MP ultra-wide + 5 MP depth-sensing + 5 MP macro and 32 MP front camera.

While Samsung Galaxy A31 is powered by Helio P65 chipset, 4 GB or 6 GB RAM, 64 GB or 128 GB storage, 6.4" Super AMOLED screen, 5000 mAh battery with 15W fast charging, quad rear camera with 48 MP main sensor + 8 MP ultra-wide lens + 5 MP depth-sensor + 5 MP macro lens, and 20 MP front camera.



Here’s an in-depth specifications comparison between Samsung Galaxy A51 Vs Samsung Galaxy A31.

Jump to:
  1. System  on  Chip (SOC)
  2. RAM
  3. Storage
  4. Display
  5. Rear Camera 
  6. Front Camera
  7. Battery
  8. Price
  9. Network



Samsung Galaxy A31
Samsung Galaxy A51
Brand and Model   
Brand and Model   
Brand 
Brand 
Samsung
Samsung
Model
Model 
Galaxy A31
Galaxy A51
Galaxy A31 Operating System 
Galaxy A51 Operating System 
Android 10
Android 10
User Interface (UI)
User Interface (UI)
One UI 2.0
 One UI 2.0



Galaxy A31 System on  Chip (SOC) Galaxy A51 System on  Chip (SOC)    
SOC SOC 
MediaTek Helio P65 Samsung Exynos 7 Octa 9611
Process Technology  Process Technology 
12 nm  10 nm 
CPU CPU
2x 2.0 GHz Cortex-A75 4x 2.3 GHz ARM Cortex-A73
6x 1.7 GHz Cortex-A55 4x 1.7 GHz ARM Cortex-A53
CPU Bits  CPU Bits 
64 bit  64 bits 
Instruction Set   Instruction Set  
ARMv8-A  ARMv8-A
CPU Frequency  CPU Frequency 
2000 MHz  2300 MHz  
CPU Cores  CPU Cores 
8  8
GPU GPU
ARM Mali-G72 MP3
 GPU Cores GPU Cores
3



Galaxy A31 RAM Capacity Galaxy A51 RAM Capacity 
4 GB 4 GB
6 GB 6 GB
RAM Type   RAM Type  
LPDDR4X LPDDR4X
RAM Channels   RAM Channels  
Double channel Double channel



Galaxy A31 Storage Galaxy A51 Storage    
64 GB   64 GB 
128 GB    128 GB 
Galaxy A31 Memory Cards Galaxy A51 Memory Cards 
microSD microSD
microSDHC microSDHC
microSDXC microSDXC



Galaxy A31 Display Galaxy A51 Display    
Type / Technology  Type / Technology 
Super AMOLED Super AMOLED
Diagonal Size  Diagonal Size 
6.4 in  6.5 in 
162.56 mm  165.1 mm 
16.26 cm  16.51 cm 
Width  Width 
2.63 in   2.72 in 
66.71 mm   69.19 mm 
6.67 cm   6.92 cm 
Height  Height 
5.84 in   5.9 in 
148.24 mm  149.9 mm 
14.82 cm   14.99 cm 
Aspect Ratio  Aspect Ratio 
2.222:1  2.167:1
Resolution  Resolution 
1080 x 2400 pixels  1080 x 2340 pixels 
Pixel Density  Pixel Density 
411 ppi   396 ppi 
161 ppcm  155 ppcm 
Color Depth  Color Depth 
24 bit   24 bits  
16777216 colors   16777216 colors 
Display Area  Display Area 
85.20%   89.19 % 
Other Features  Other Features 
Capacitive  Capacitive 
Multi-touch  Multi-touch 
Scratch resistant Scratch resistant
Galaxy A31 Sensors Galaxy A51 Sensors    
Proximity Proximity
Light Light
Accelerometer Accelerometer
Compass Compass
Gyroscope Gyroscope
Fingerprint Fingerprint
Hall  In-display fingerprint sensor



Galaxy A31 Rear Camera Galaxy A51 Rear Camera    
Sensor Model Sensor Model
 Samsung S5KGM2
Sensor type  Sensor type 
ISOCELL
 Sensor Format  Sensor Format
1/2.25”
Pixel size Pixel size
0.8 µm (micrometers)
0.000800 mm
Aperture Aperture
f/2 f/2
Flash Type Flash Type
LED LED
 Image Resolution   Image Resolution 
8000 x 6000 pixels  8000 x 6000 pixels 
48 MP  48 MP 
Video resolution Video resolution
1920 x 1080 pixels 1920 x 1080 pixels
2.07 MP 2.07 MP
Video FPS Video FPS
30 fps 30 fps
Features  Features 
Autofocus Autofocus 
Continuous shooting Continuous shooting 
Digital zoom Digital zoom
 Digital image stabilization
Geotagging Geotagging 
Panorama Panorama 
HDR HDR 
Touch focus Touch focus 
Face detection Face detection
White balance settings White balance setting 
ISO settings ISO setting 
Exposure compensation Exposure compensation 
Self-timer Self-timer 
Scene mode Scene mode 
 Sensor size-1/2.25”
 Pixel size- 1.6 um (4-in-1 pixel binning)
 Sensor type- ISOCELL Plus
 Super Phase Detection
 6-element lens
 PDAF
Secondary rear camera - 8 MP (ultra-wide) Secondary rear camera - 12 MP (ultra-wide)
Aperture size - f/2.2 (#2) Aperture size - f/2.2 (#2)
Pixel size- 1.12 um (#2)
Third rear camera - 5 MP (depth-sensing) Third rear camera - 5 MP (depth-sensing)
Aperture size - f/2.4 (#3) Aperture size - f/1.12 (#3)
Fourth rear camera - 5 MP (macro) Fourth Rear Camera-5 MP (Macro)
Aperture size - f/2.4 (#4)  Aperture size- f/2.4 (#4)



Galaxy A31 Front Camera Galaxy A51 Front Camera
Sensor Model Sensor Model
 Samsung S5KGD1
Sensor Type Sensor Type
ISOCELL
Aperture Aperture
f/2.2 f/2.2
Image Resolution  Image Resolution 
6560 x 4928 pixels
20 MP 32.33 MP
Video Resolution Video Resolution
1920 x 1080 pixels 1920 x 1080 pixels
2.07 MP 2.07 MP
Video FPS Video FPS
30 fps 30 fps
Features  Features 
 Sensor size-1/2.8”
 Pixel size- 0.8 um
 Sensor type- ISOCELL
 Face unlock
Galaxy A31 Audio Galaxy A51 Audio 
Speaker Speaker
Loudspeaker Loudspeaker 
Earpiece Earpiece
Galaxy A31 Radio Galaxy A51 Radio    
Yes Yes
Galaxy A31 Tracking /  Positioning  Galaxy A51 Tracking /  Positioning 
GPS GPS
A-GPS A-GPS
GLONASS GLONASS
BeiDou BeiDou
Galileo 
Galaxy A31 Wi-Fi Galaxy A51 Wi-Fi    
802.11a (IEEE 802.11a-1999) 802.11a (IEEE 802.11a-1999)
802.11b (IEEE 802.11b-1999) 802.11b (IEEE 802.11b-1999)
802.11g (IEEE 802.11g-2003) 802.11g (IEEE 802.11g-1999)
802.11n (IEEE 802.11n-2009) 802.11n (IEEE 802.11n-2003) 
802.11n 5GHz 802.11n 5GHz
802.11ac (IEEE 802.11ac) 802.11ac (IEEE 802.11ac)
Dual band Dual band
Wi-Fi Hotspot  Wi-Fi Hotspot 
Wi-Fi Direct Wi-Fi Direct
 Wi-Fi Display
Galaxy A31 Bluetooth Galaxy A51 Bluetooth  
Version  Version 
5  5.0
Features  Features 
A2DP (Advanced Audio Distribution Profile) A2DP 
AVRCP (Audio/Visual Remote Control Profile) AVRCP
DIP (Device ID Profile) DIP
HFP (Hands-Free Profile) HFP
HID (Human Interface Profile) HID
HSP (Headset Profile) HSP
MAP (Message Access Profile) MAP
OPP (Object Push Profile) OPP
PAN (Personal Area Networking Profile) PAN
PBAP/PAB (Phone Book Access Profile) PBAP/PAB
HOGP HOGP



Galaxy A31 USB Galaxy A51 USB 
Connector Type   Connector Type  
USB Type-C USB Type-C
Version Version 
2  2.0
Features  Features 
Charging Charging 
Mass storage Mass Storage 
On-The-Go On-The-Go
Galaxy A31 Headphone Jack Galaxy A51 Headphone Jack 
Yes Yes
Galaxy A31 Connectivity Galaxy A51 Connectivity 
Computer sync  Computer sync 
OTA sync  OTA sync 
Tethering Tethering
NFC
VoLTE  VoLTE
ANT+
Galaxy A31 Browser Galaxy A51 Browser    
HTML HTML 
HTML5 HTML5 
CSS 3 CSS 3 
Galaxy A31 Audio File Formats /  Codecs    Galaxy A51 Audio File Formats /  Codecs    
AAC (Advanced Audio Coding) AAC 
AMR / AMR-NB / GSM-AMR (Adaptive Multi-Rate, .amr, .3ga) AMR / AMR-NB / GSM-AMR 
AMR-WB (Adaptive Multi-Rate Wideband, .awb) AMR-WB
eAAC+ / aacPlus v2 / HE-AAC v2 eAAC+ / aacPlus v2 / HE-AAC v2
FLAC (Free Lossless Audio Codec, .flac) FLAC 
M4A (MPEG-4 Audio, .m4a) M4A
MIDI MIDI 
MP3 (MPEG-2 Audio Layer II, .mp3)
OGG (.ogg, .ogv, .oga, .ogx, .spx, .opus) OGG 
WMA (Windows Media Audio, .wma) WMA 
WAV (Waveform Audio File Format, .wav, .wave) WAV 
Galaxy A31 Video File Formats /  Codecs Galaxy A51 Video File Formats /  Codecs    
3GPP (3rd Generation Partnership Project, .3gp) 3GPP 
3GPP2 (3rd Generation Partnership Project 2, .3g2) 3GPP2
AVI (Audio Video Interleaved, .avi) AVI 
DivX
Flash Video (.flv, .f4v, .f4p, .f4a, .f4b) Flash Video
H.263 H.263
H.264 / MPEG-4 Part 10 / AVC video H.264 / MPEG-4 Part 10 / AVC video
H.265 / MPEG-H Part 2 / HEVC H.265 / MPEG-H Part 2 / HEVC
MKV (Matroska Multimedia Container, .mkv .mk3d .mka .mks) MKV
MP4 (MPEG-4 Part 14, .mp4, .m4a, .m4p, .m4b, .m4r, .m4v) MP4
VC-1 VC-1
VP8 VP8
VP9 VP9
WebM WebM
WMV (Windows Media Video, .wmv) WMV
WMV7 (Windows Media Video 7, .wmv) WMV7
WMV8 (Windows Media Video 8, .wmv) WMV8
Xvid Xvid



Galaxy A31 Battery Galaxy A51 Battery    
Capacity Capacity
5000 mAh) 4000 mAh
Type  Type 
Li-Ion Li-Polymer
Features  Features 
Fast charging Non-removable 
Non-removable Fast charging
 Charger Output Power Charger Output Power
5 V / 2 A  5 V / 2 A
9 V / 1.67 A  9 V / 1.67 A
Galaxy A31 Launch Launch   
Announced  Announced 
 2020, 24th March  2019, 13th December
Status Status 
Exp. Release April 2020 Release December 2019



Galaxy A31 Price Galaxy A51 Price   
- 4 GB + 64 GB = 280 $
6 GB + 128 GB =  315 $
Galaxy A31 Design Galaxy A51 Design    
Colors  Colors 
Prism Crush Black Prism Crush Black
Prism Crush Blue Prism Crush Blue
Prism Crush Red Prism Crush Pink
Prism Crush White Prism Crush White
Width  Width 
73.1 mm  73.6 mm 
7.31 cm   7.36 cm 
0.24 ft  0.24 ft 
2.88 in   2.9 in 
Height  Height 
159.3 mm 158.5 mm 
15.93 cm 15.85 cm 
0.52 ft  0.52 ft 
6.27 in   6.24 in 
Thickness  Thickness 
8.6 mm  7.9 mm 
0.86 cm   0.79 cm 
0.03 ft  0.03 ft 
0.34 in   0.31 in 
Weight  Weight 
185 g  172 g
0.41 lbs  0.38 lbs
6.53 oz  6.07 oz
Volume  Volume 
100.15 cm³  92.16 cm3
6.08 in³   5.6 in3
Body Materials Body Materials
Plastic Plastic
Galaxy A31 SIM Card Galaxy A51 SIM Card    
SIM Card Type   SIM Card Type  
Nano-SIM (4FF - fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm) Nano-SIM (4FF-fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm) 
Number of SIM Cards  Number of SIM Cards 
2   2
Features Features
Dual SIM stand-by Dual SIM stand-by
Galaxy A31 Mobile Network Technology and Bandwidth Galaxy A51 Mobile Network Technology and Bandwidth   
UMTS (384 kbit/s )  UMTS (384 kbit/s) 
EDGE  EDGE 
GPRS  GPRS  
HSPA+ (HSUPA 5.76 Mbit/s , HSDPA 42 Mbit/s )  HSPA+ 
LTE Cat 10 (102.0 Mbit/s , 452.2 Mbit/s ) LTE Cat 12 (102.0 Mbit/s, 603.0 Mbit/s)



Galaxy A31 Networks Galaxy A51 Networks    
GSM GSM
GSM 850 MHz (B5) GSM 850 MHz (B5)
GSM 900 MHz (B8) GSM 900 MHz (B8)
GSM 1800 MHz (B3) GSM 1800 MHz (B3)
GSM 1900 MHz (B2) GSM 1900 MHz (B2)
UMTS UMTS
UMTS 850 MHz (B5) UMTS 850 MHz (B5)
UMTS 900 MHz (B8) UMTS 900 MHz (B8)
UMTS 1900 MHz (B2) UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1) UMTS 2100 MHz (B1)
LTE LTE
LTE-FDD 850 MHz (B5) LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8) LTE-FDD 900 MHz (B8)
LTE-FDD 1900 MHz (B25) LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1) LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)  LTE-FDD 2600 MHz (B7)

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