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OPPO R9s vs Samsung Galaxy A51 vs Samsung Galaxy A12

Compare phone and tablet specifications of up to three devices at once.

Comparison mode:

Display

Size:

5.5 inches
6.5 inches
6.5 inches

Resolution:

1920 x 1080 pixels, 401 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI

Technology:

AMOLED
Super AMOLED
LCD

Refresh rate:

60Hz

Screen-to-body:

73.28 %
87.37 %
85.80 %

Features:

Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 625 8953
Samsung Exynos 9611 (10 nm)
Mediatek Helio P35 MT6765 (12 nm)

Processor:

Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit
Octa-core, 2300 MHz, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
Octa-core, 4x 2.3GHz Cortex-A53 + 4x 1.8GHz Cortex-A53, 64-bit

GPU:

Adreno 506
Mali-G72 MP3
PowerVR GE8320

RAM:

4GB LPDDR3
4GB LPDDR4
4GB LPDDR4

Internal storage:

64GB
128GB, available to use: 105.9 GB
64GB (eMMC 5.1), available to use: 48.2 GB

Storage expansion:

microSDXC up to 256 GB
microSDXC up to 512 GB
microSDXC up to 1024 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (6.0 Marshmallow), OPPO ColorOS UI
Android (11, 10), Samsung One UI
Android (10), Samsung One UI UI

Battery

Capacity:

3010 mAh
4000 mAh
5000 mAh

Type:

Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable

Battery life test results:

Charging:

OPPO VOOC
Fast charging
Samsung Adaptive Fast Charging

Max charge speed:

Wired: 15.0W

Camera

Rear:

Single camera
Quad camera
Quad camera

Main camera:

16 MP (Autofocus, CMOS image sensor)
48 MP (PDAF)
48 MP (Autofocus)

Specifications:

Aperture size: F1.7
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm

Second camera:

12 MP (Ultra-wide)
5 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2

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), 1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)

Features:

HDR, Video calling, Video sharing
Hyperlapse, EIS

Front:

16 MP
32 MP (HDR)
8 MP

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.02 x 2.93 x 0.26 inches (153 x 74.3 x 6.58 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
6.46 x 2.98 x 0.35 inches (164 x 75.8 x 8.9 mm)

Weight:

5.19 oz (147.0 g)
6.07 oz (172.0 g)
7.23 oz (205.0 g)

Materials:

Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic

Biometrics:

Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Fingerprint (touch)

Keys:

Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors:

Gold, Pink
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Black, White, Blue, Red

Cellular

LTE (FDD):

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
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), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

Bands 5(850), 8(900), 2(1900), 1(2100)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Bands 1(2100), 5(850), 8(900)

Data Speed:

LTE, HSPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes
Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Album art cover, Background playback
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share, MirrorLink

Radio:

FM

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

4.1
5.0
5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 b, g, n; Wi-Fi Direct, Hotspot

USB:

microUSB, USB 2.0
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0

Features:

Mass storage device, OTG, Charging
Charging, OTG
Charging, Mass storage device

Location:

GPS, A-GPS
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer

Other:

Tethering, Computer sync, OTA sync
NFC, ANT+
NFC

Regulatory Approval

FCC approval:

Date approved:

Nov 28, 2019
Mar 11, 2021

FCC ID value:

A3LSMA515FN
A3LSMA125U

Measured SAR:

Head:

0.89 W/kg
1.14 W/kg

Body:

1.18 W/kg
1.20 W/kg

Simultaneous Transmission:

1.56 W/kg
1.59 W/kg

Wireless Router:

1.12 W/kg
1.34 W/kg

Phablet:

2.76 W/kg

Buyers information

Price:

$ 410
$ 400
€ 179

User Manual:

This is the official Samsu​ng Galaxy A51 User Guide in English provided from the manufacturer.
This is the official Samsu​ng Galaxy A12 User Guide in English provided from the manufacturer.

In The Box:

Power brick, USB cable, Headphones, Sim card extraction tool

Availability

Officially announced:

Dec 12, 2019
Nov 24, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless