Samsung Galaxy A51 vs Xiaomi MI-3: 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.

Display technology

OLED versus LCD

Galaxy A51:

OLED

MI-3:

LCD
Weight

MI-3: 27 g lighter

Galaxy A51:

172 g

MI-3:

145 g
Screen diagonal

MI-3: 1.5 in smaller diagonal

Galaxy A51:

6.5 in

MI-3:

5 in
Memory variants

At 64 GB storage

Galaxy A51:

4 GB RAM

MI-3:

2 GB RAM
Chipset

Galaxy A51:

Exynos 9611 (10nm)

MI-3:

Qualcomm MSM8274AB Snapdragon 800 (28 nm)
Rear camera layout

Galaxy A51:

Quad

MI-3:

Single

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 A51

Height:

158.5 mm +14.5 mm versus MI-3
Width:

73.6 mm
Depth:

7.9 mm
2. MI-3

Height:

144 mm
Width:

73.6 mm
Depth:

8.1 mm

Weight

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

1. Galaxy A51

172 g

+27 g versus MI-3
2. MI-3

145 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 A51

Screen diagonal:

6.5 in

Aspect ratio (height:width):

20:9

Approximate rectangular screen area:

102 cm²
2. MI-3

Screen diagonal:

5 in

Aspect ratio (height:width):

16:9

Approximate rectangular screen area:

68.9 cm²

Galaxy A51 has approximately 48% more rectangular screen area than MI-3.

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 A51, MI-3, compared at the same storage capacity.
Storage	Galaxy A51	MI-3
16 GB	Not recorded	2 GB RAM
64 GB Recorded for all phones	4 GB RAM	2 GB RAM
128 GB	4 / 6 / 8 GB RAM Alternative RAM configurations	Not recorded

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 A51

NFC:: Yes
Headphone jack:: Yes
Memory card support:: See details microSD · up to 1 TB (dedicated slot)

2. MI-3

NFC:: Yes
Headphone jack:: Yes
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 A51

4000 mAh

+950 mAh versus MI-3
2. MI-3

3050 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 A512. MI-3

Everyday essentials

Everyday essentials — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Dimensions (HxWxD)	158.5 Х 73.6 Х 7.9 mm	144 Х 73.6 Х 8.1 mm
Weight	172 g	145 g
Technology	Super AMOLED	IPS LCD
Screen size	6.5" inch	5" inch
Screen resolution	1080 x 2400 px	1080 x 1920 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 128GB 8GB RAM	16/64 GB 2 GB RAM
Memory card support	microSD up to 1 TB (dedicated slot)	No
Battery Capacity is not battery life. No endurance test is implied.	4000 mAh Non-removable Li-Po	3050 mAh Non-removable Li-Ion
Operating system OS	Android 10.0; One UI 2	Android 4.3 (Jelly Bean) upgradable to 6.0 (Marshmallow); MIUI 5
Chipset	Exynos 9611 (10nm)	Qualcomm MSM8274AB Snapdragon 800 (28 nm)
NFC	Yes	Yes
Headphone jack	Yes	Yes

Display

Display — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	16M
Screen area	102.0 cm2	68.9 cm2
Screen format	20:9 (height:width)	16:9 (height:width)
Screen to body ratio	87.4%	65.0%
PPI /points per inch/	405 PPI	441 PPI
Screen protection	Corning Gorilla Glass 3	Corning Gorilla Glass 3

Camera and Video

Camera and Video — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Rear camera, main	48 MP Quad	13 MP Single
Camera specs	48 MP f/2.0 26mm (wide) 1/2.0" 0.8µm PDAF -12 MP f/2.2 12mm (ultrawide) -5 MP f/2.4 25mm (macro) 1/5.0" 1.12µm -5 MP 1.12µm depth sensor	13 MP f/2.2 28mm (wide) AF
Functions	HDR	Dual-LED flash HDR
Video	1080p@30fps	1080p@30fps
Front camera, selfie	32 MP Single	2 MP Single
Specifications	32 MP f/2.2 26mm (wide) 1/2.8" 0.8µm	2 MP f/2.2

Performance

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

Performance — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Processor CPU	Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)	Quad-core 2.3 GHz Krait 400
Graphics processor GPU	Mali-G72 MP3	Adreno 330
Antutu 7 score *	155326	55192
Antutu 8 score *	186846	Unknown
GeekBench 5 Single Core *	322	Unknown
GeekBench 5 Multi-Core *	1212	Unknown

General specs

General specs — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Release date	2019 December	2013 September
Colors	Prism Crush Black White Blue Pink	White Gray Black Yellow Pink Blue Gold Green (16 GB)
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	$280	200 EUR
Battery life	Talking time- Up to 32 h (3G) Music play - Up to 87 h	Stand by time- Up to 500 h Talking time- Up to 25 h Music play - Up to 50 h
Body build	Glass front (Gorilla Glass 3) plastic back plastic frame	plastic body

Communication and Connectivity

Communication and Connectivity — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
SIM card	Single SIM (Nano-SIM)Dual SIM (Nano-SIM dual stand-by)	Mini-SIM
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 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE (unspecified)	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
Speed	HSPA LTE-A	HSPA 42.2/5.76 Mbps
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 dual-band Wi-Fi Direct hotspot
GPS	Yes with A-GPS GLONASS GALILEO BDS	Yes with A-GPS GLONASS
USB	2.0 Type-C 1.0 reversible connector USB On-The-Go	microUSB 2.0 USB Host
Bluetooth	5.0 A2DP LE	4.0 A2DP
Harmful irradiation	SAR - 0.80 W/kg (head) 0.67 W/kg (body) SAR EU - 0.37 W/kg (head) 1.59 W/kg (body)	Unknown

Music and Audio

Music and Audio — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Radio	FM radio	FM radio
Others	Active noise cancellation with dedicated mic	Active noise cancellation with dedicated mic

Other features

Other features — specifications for Galaxy A51, MI-3.
Specification	Galaxy A51	MI-3
Dop	Sensors Fingerprint (under display optical) accelerometer gyro proximity compass - ANT+ - Fast battery charging 15W - Versions: SM-A515F/DSN (Global); SM-A515F/DS (LATAM); SM-A515F/DST (Brazil); SM-A515F/DSM (Russia); SM-A515F/N (Australia)	Sensors Accelerometer gyro proximity compass barometer - Fast battery charging (Quick Charge 2.0)

Samsung Galaxy A51 vs Xiaomi MI-3