Oppo A83 3GB/32GB

Samsung Galaxy A21s 4GB/64GB

os

Android N OS 7.1

Android 10, One UI 2.0

RAM

3 GB

4 GB

ROM

32 GB

64 GB

expandable

256 GB

512 GB

CPU

2.5 GHz Cortex-A53

Octa-core (4x2.0 GHz Cortex-A55 & 4x2.0 GHz Cortex-A55)

GPU

Mali-G71 MP2

Mali-G52

SoC

Mediatek MT6763T Helio P23

Exynos 850 (8nm)

number of cores

8core

8core

features

LED flash, panorama, HDR

primary

13 MP

Quad:
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8m, PDAF
8 MP, f/2.2, 123 (ultrawide), 1/4.0", 1.12m
2 MP, f/2.4, (macro)
2 MP, f/2.4, (depth)

secondary

8 MP

13 MP, f/2.2, (wide), 1/3.1", 1.12m

video

1080p@30fps

capacity

3180mAh

5000mAh

charging

Fast charging 15W

type

Li-Ion (non-removeable)

Li-Polymer (non-removable)

dimension

150.5 x 73.1 x 7.7 mm

163.7 x 75.3 x 8.9 mm

display

IPS LCD 720 x 1440 pixels (~282 ppi density)

PLS TFT capacitive touchscreen, 16M colors

screen

5.7"

6.5"

weight

143 gm

192 gm

GPS

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

NFC

Yes (market/region dependent)

USB

microUSB 2.0, USB On-The-Go

2.0, Type-C 1.0 reversible connector

bluetooth

4.2, A2DP, LE

5.0, A2DP, LE

internet

2G, 3G, 4G

2G/3G/4G/LTE

wifi

802.11 a/b/g/n, dual-band, WiFi Direct, hotspot

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

radio

No

FM Radio

sensors

Accelerometer, proximity, compass, GPS, A-GPS

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