Samsung Galaxy A31

Brand and model

Brand	Samsung
Model	Galaxy A31

Design

Width	73.1 mm 7.31 cm 0.24 ft 2.88 in
Height	159.3 mm 15.93 cm 0.52 ft 6.27 in
Thickness	8.6 mm 0.86 cm 0.03 ft 0.34 in
Weight	185 g 0.41 lbs 6.53 oz
Volume	100.15 cm³ 6.08 in³
Colors	Prism Crush Black Prism Crush Blue Prism Crush Red Prism Crush White
Body materials	Plastic

SIM card

SIM card type	Nano-SIM (4FF — fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm)
Number of SIM cards	2
Features	Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)

Networks

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

Mobile network technologies and bandwidth

Mobile network technologies

UMTS (384 kbit/s ) EDGE GPRS HSPA+ (HSUPA 5.76 Mbit/s , HSDPA 42 Mbit/s ) LTE Cat 10 (102.0 Mbit/s , 452.2 Mbit/s )

Operating system

Operating system (OS)	Android 10
User interface (UI)	One UI 2.0

System on Chip (SoC)

CPU	2x 2.0 GHz Cortex-A75, 6x 1.7 GHz Cortex-A55
CPU bits	64 bit
Instruction set	ARMv8-A
CPU cores	8
CPU frequency	2000 MHz
RAM capacity	4 GB 6 GB
RAM type	LPDDR4X
RAM channels	Double channel

Storage

Storage	64 GB 128 GB
	eMMC 5.1

Memory cards

Types

microSD microSDHC microSDXC

Display

Type/technology	Super AMOLED
Diagonal size	6.4 in 162.56 mm 16.26 cm
Width	2.63 in 66.71 mm 6.67 cm
Height	5.84 in 148.24 mm 14.82 cm
Aspect ratio	2.222:1
Resolution	1080 x 2400 pixels
Pixel density	411 ppi 161 ppcm
Color depth	24 bit 16777216 colors
Display area	85.2 %
Other features	Capacitive Multi-touch Scratch resistant
	Infinity-U Display 2.5D curved glass screen

Sensors

Sensors	Proximity Light Accelerometer Compass Gyroscope Fingerprint Hall
	In-display fingerprint sensor

Rear camera

Pixel size	0.8 µm (micrometers) 0.000800 mm
Aperture	f/2
Flash type	LED
Image resolution	8000 x 6000 pixels 48 MP
Video resolution	1920 x 1080 pixels 2.07 MP
Video FPS	30 fps
Features	Autofocus Continuous shooting Digital zoom Geotagging Panorama HDR Touch focus Face detection White balance settings ISO settings Exposure compensation Self-timer Scene mode
	Secondary rear camera — 8 MP (ultra-wide) Aperture size — f/2.2 (#2) Third rear camera — 5 MP (depth-sensing) Aperture size — f/2.4 (#3) Fourth rear camera — 5 MP (macro) Aperture size — f/2.4 (#4)

Front camera

Aperture	f/2.2
Image resolution	20 MP
Video resolution	1920 x 1080 pixels 2.07 MP
Video FPS	30 fps

Audio

Speaker

Loudspeaker Earpiece

Radio

Radio

Yes

Tracking / Positioning

Tracking / Positioning

GPS A-GPS GLONASS BeiDou

Wi-Fi

Wi-Fi

802.11a (IEEE 802.11a-1999) 802.11b (IEEE 802.11b-1999) 802.11g (IEEE 802.11g-2003) 802.11n (IEEE 802.11n-2009) 802.11n 5GHz 802.11ac (IEEE 802.11ac) Dual band Wi-Fi Hotspot Wi-Fi Direct

Bluetooth

Version	5.0
Features	A2DP (Advanced Audio Distribution Profile) AVRCP (Audio/Visual Remote Control Profile) DIP (Device ID Profile) HFP (Hands-Free Profile) HID (Human Interface Profile) HSP (Headset Profile) MAP (Message Access Profile) OPP (Object Push Profile) PAN (Personal Area Networking Profile) PBAP/PAB (Phone Book Access Profile) HOGP

USB

Connector type	USB Type-C
Version	2.0
Features	Charging Mass storage On-The-Go

Headphone jack

Headphone jack

Yes

Connectivity

Connectivity	Computer sync OTA sync Tethering NFC VoLTE
	Availability of Samsung Pay Service (NFC or MST) may vary by country.

Browser

Browser

HTML HTML5 CSS 3

Audio file formats/codecs

Audio file formats/codecs

AAC (Advanced Audio Coding) AMR / AMR-NB / GSM-AMR (Adaptive Multi-Rate, .amr, .3ga) AMR-WB (Adaptive Multi-Rate Wideband, .awb) eAAC+ / aacPlus v2 / HE-AAC v2 FLAC (Free Lossless Audio Codec, .flac) M4A (MPEG-4 Audio, .m4a) MIDI MP3 (MPEG-2 Audio Layer II, .mp3) OGG (.ogg, .ogv, .oga, .ogx, .spx, .opus) WMA (Windows Media Audio, .wma) WAV (Waveform Audio File Format, .wav, .wave)

Video file formats/codecs

Video file formats/codecs

3GPP (3rd Generation Partnership Project, .3gp) 3GPP2 (3rd Generation Partnership Project 2, .3g2) AVI (Audio Video Interleaved, .avi) Flash Video (.flv, .f4v, .f4p, .f4a, .f4b) H.263 H.264 / MPEG-4 Part 10 / AVC video H.265 / MPEG-H Part 2 / HEVC MKV (Matroska Multimedia Container, .mkv .mk3d .mka .mks) MP4 (MPEG-4 Part 14, .mp4, .m4a, .m4p, .m4b, .m4r, .m4v) VC-1 VP8 VP9 WebM WMV (Windows Media Video, .wmv) WMV7 (Windows Media Video 7, .wmv) WMV8 (Windows Media Video 8, .wmv) Xvid

Battery

Capacity	5000 mAh
Type	Li-Ion
Charger output power	5 V / 2 A 9 V / 1.67 A
Features	Fast charging Non-removable