Oppo A3s 3GB

Xiaomi Redmi Note 9

os

Android v8.1 (Oreo)

Android 10, MIUI 11

RAM

3 GB

4 GB

ROM

16 GB

128 GB

expandable

256 GB

512 GB

CPU

1.8 GHz, Cortex A53

Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)

GPU

Adreno 506

Mali-G52 MC2

SoC

Qualcomm Snapdragon 450

MediaTek Helio G85 (12nm)

number of cores

8core

8core

features

LED flash, HDR, panorama

primary

13.0MP + 2.0MP Dual Camera with AF and flash light

Quad:
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8m, PDAF
8 MP, f/2.2, 118 (ultrawide), 1/4.0", 1.12m
2 MP, f/2.4, (macro), AF
2 MP, f/2.4, (depth)

secondary

8 MP

13 MP, f/2.3, 29mm (standard), 1/3.1", 1.12m

video

1080p@30fps

capacity

4230mAh

5020mAh

charging

Fast charging 18W, Reverse charging 9W

type

Li-Polymer, Non-removable

Li-Polymer (non-removable)

build

Glass front (Gorilla Glass 5), plastic frame

dimension

156.2 x 75.6 x 8.2 mm

162.3 x 77.2 x 8.9 mm

display

IPS LCD 1520x720, 272 PPI, 19:9 aspect ratio

IPS LCD capacitive touchscreen, 16M colors

protection

Corning Gorilla Glass 5, 450 nits typ. brightness (advertised)

resolution

1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density)

screen

6.2"

6.53"

weight

168 gm

199 gm

GPS

Yes, with A-GPS, GLONASS, GALILEO, BDS

NFC

Yes (market/region dependent)

USB

microUSB 2.0

2.0, Type-C 1.0 reversible connector

bluetooth

4.2, A2DP, LE

5.0, A2DP, LE

infrared port

Yes

internet

2G, 3G, 4G

2G/3G/4G/LTE

wifi

802.11 a/b/g/n, Hotspot

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot

radio

FM Radio

FM Radio

general

Dual SIM

sensors

P-Sensor, L-Sensor, Accelerometer, Gyroscope, Geomagnetic Sensor

Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass