Samsung Galaxy A31 vs Xiaomi Mi 9 SE: specs comparison

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

Weight

Mi 9 SE: 30 g lighter

Galaxy A31:

185 g

Mi 9 SE:

155 g
Width

Mi 9 SE: 2.6 mm narrower

Galaxy A31:

73.1 mm

Mi 9 SE:

70.5 mm
Screen diagonal

Mi 9 SE: 0.43 in smaller diagonal

Galaxy A31:

6.4 in

Mi 9 SE:

5.97 in
Memory variants

At 64 GB storage

Galaxy A31:

4 GB RAM

Mi 9 SE:

6 GB RAM
Rear camera layout

Galaxy A31:

Quad

Mi 9 SE:

Triple
Depth

Mi 9 SE: 1.1 mm thinner

Galaxy A31:

8.6 mm

Mi 9 SE:

7.5 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. Galaxy A31

Height:

159.3 mm +11.8 mm versus Mi 9 SE
Width:

73.1 mm +2.6 mm versus Mi 9 SE
Depth:

8.6 mm +1.1 mm versus Mi 9 SE
2. Mi 9 SE

Height:

147.5 mm
Width:

70.5 mm
Depth:

7.5 mm

Weight

Bars start at zero and share a scale within this chart.

1. Galaxy A31

185 g

+30 g versus Mi 9 SE
2. Mi 9 SE

155 g

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. Galaxy A31

Screen diagonal:

6.4 in

Aspect ratio (height:width):

20:9

Approximate rectangular screen area:

98.9 cm²
2. Mi 9 SE

Screen diagonal:

5.97 in

Aspect ratio (height:width):

19.5:9

Approximate rectangular screen area:

87.5 cm²

Galaxy A31 has approximately 13% more rectangular screen area than Mi 9 SE.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for Galaxy A31, Mi 9 SE, compared at the same storage capacity.
Storage	Galaxy A31	Mi 9 SE
64 GB Recorded for all phones	4 GB RAM	6 GB RAM
128 GB Recorded for all phones	4 / 6 GB RAM Alternative RAM configurations	6 GB RAM

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. Galaxy A31

NFC:: See details Yes (market/region dependent)
Headphone jack:: Yes
Memory card support:: See details microSDXC (dedicated slot)

2. Mi 9 SE

NFC:: Yes
Headphone jack:: No
Memory card support:: No

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

1. Galaxy A31

5000 mAh

+1930 mAh versus Mi 9 SE
2. Mi 9 SE

3070 mAh

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. Galaxy A312. Mi 9 SE

Everyday essentials

Everyday essentials — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Dimensions (HxWxD)	159.3 Х 73.1 Х 8.6 mm	147.5 Х 70.5 Х 7.5 mm
Weight	185 g	155 g
Technology	Super AMOLED	Super AMOLED
Screen size	6.4" inch	5.97" inch
Screen resolution	1080 x 2400 px	1080 x 2340 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.	64GB 4GB RAM 128GB 4GB RAM 128GB 6GB RAM	64/128 GB 6 GB RAM
Memory card support	microSDXC (dedicated slot)	No
Battery Capacity is not battery life. No endurance test is implied.	5000 mAh Non-removable Li-Po	3070 mAh Non-removable Li-Po
Operating system OS	Android 10.0; One UI 2.0	Android 9.0 (Pie)
Chipset	Unknown	Qualcomm SDM712 Snapdragon 712 (10 nm)
NFC	Yes (market/region dependent)	Yes
Headphone jack	Yes	No

Display

Display — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Touchscreen	capacitive touchscreen	Super AMOLED capacitive touchs
Display colors	16M	16M
Screen area	98.9 cm2	87.5 cm2
Screen format	20:9 (height:width)	19.5:9 (height:width)
Screen to body ratio	84.9%	84.1%
PPI /points per inch/	411 PPI	432 PPI
Screen protection	Unknown	Corning Gorilla Glass 5

Camera and Video

Camera and Video — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Rear camera, main	48 MP Quad	48 MP Triple
Camera specs	48 MP f/2.0 26mm (wide) 1/2.0" 0.8µm PDAF -8 MP f/2.2 13mm (ultrawide) 1/4.0" 1.12µm -5 MP f/2.4 (macro) -5 MP (depth)	48 MP f/1.8 1/2'' 0.8µm PDAF -13 MP f/2.4 (ultrawide) 1.12µm -8 MP (telephoto) 1.12µm PDAF
Functions	LED flash panorama HDR	HDR
Video	1080p@30fps	1080p@30fps
Front camera, selfie	20 MP Single	20 MP Single
Specifications	20 MP f/2.2 (wide)	20 MP f/2.0 0.9μm

Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Processor CPU	Octa-core (2x2.0 GHz & 6x1.7 GHz)	Octa-core 2.3 GHz
Graphics processor GPU	Unknown	Adreno 616
Antutu 7 score *	Unknown	177362
GeekBench 4 Single Core *	Unknown	1870
GeekBench 4 Multi-Core *	Unknown	5825
Antutu 8 score *	Unknown	223441
GeekBench 5 Single Core *	Unknown	405
GeekBench 5 Multi-Core *	Unknown	1451

General specs

General specs — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Release date	2020 March 24	2019 February
Colors	Prism Crush Black Prism Crush Blue Prism Crush Red Prism Crush White	Violet Blue Gray
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	Unknown	300 EUR

Communication and Connectivity

Communication and Connectivity — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
SIM card	Single SIM (Nano-SIM)Dual SIM (Nano-SIM dual stand-by)	Dual SIM (Nano-SIM dual stand-by)
Network	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE (unspecified)	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100) 3(1800) 5(850) 7(2600) 8(900) 34(2000) 38(2600) 39(1900) 40(2300) 41(2500)
Speed	HSPA LTE-A	HSPA LTE-A
GPRS	Yes	Yes
Edge	Yes	Yes
Wi-Fi	Wi-Fi 802.11 a/b/g/n/ac dual-band Wi-Fi Direct hotspot	Wi-Fi 802.11 a/b/g/n/ac dual-band Wi-Fi Direct DLNA hotspot
GPS	Yes with A-GPS GLONASS GALILEO BDS	Yes with A-GPS GLONASS GALILEO BDS
USB	2.0 Type-C 1.0 reversible connector USB On-The-Go	2.0 Type-C 1.0 reversible connector USB On-The-Go
Bluetooth	5.0 A2DP LE	5.0 A2DP LE aptX HD
Harmful irradiation	SAR EU - 0.49 W/kg (head) 1.68 W/kg (body)	Unknown

Music and Audio

Music and Audio — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Radio	Unknown	No
Others	Unknown	HDR Active noise cancellation with dedicated mic

Other features

Other features — specifications for Galaxy A31, Mi 9 SE.
Specification	Galaxy A31	Mi 9 SE
Dop	Sensors Fingerprint (under display optical) accelerometer gyro proximity compass - Fast charging 15W	Sensors Fingerprint (under display) accelerometer gyro proximity compass Infrared port - Fast battery charging 18W

Samsung Galaxy A31 vs Xiaomi Mi 9 SE