Xiaomi Redmi 8 4GB/64GB

Samsung Galaxy A21s 4GB/64GB

os

Android 9.0 (Pie); MIUI 9

Android 10, One UI 2.0

RAM

4 GB

4 GB

ROM

64 GB

64 GB

expandable

512 GB

512 GB

CPU

Octa-core (2x1.95 GHz Cortex-A53 & 6x1.45 GHz Cortex A53)

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

GPU

Adreno 505

Mali-G52

SoC

Qualcomm SDM439 Snapdragon 439 (12 nm)

Exynos 850 (8nm)

number of cores

8core

8core

features

LED flash, HDR, panorama

LED flash, panorama, HDR

primary

Dual:
12 MP, f/1.8, 1/2.55", 1.4m, Dual Pixel PDAF
2 MP, depth sensor

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, f/2.0, 1.12m

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

video

1080p@30fps

1080p@30fps

capacity

5000mAh

5000mAh

charging

Fast charging 15W

type

Li-Polymer (non-removable)

Li-Polymer (non-removable)

SIM

Dual SIM (Nano-SIM, dual stand-by)

dimension

156.5 x 75.4 x 9.4 mm

163.7 x 75.3 x 8.9 mm

display

IPS LCD capacitive touchscreen, 16M colors, inches, 96.6 cm2 (~81.8% screen-to-body ratio)

PLS TFT capacitive touchscreen, 16M colors

protection

Corning Gorilla Glass 5

resolution

720 x 1520 pixels, 19:9 ratio (~270 ppi density)

screen

6.22"

6.5"

weight

188 gm

192 gm

GPS

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

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

Infrared port

Yes

NFC

Yes (market/region dependent)

USB

2.0, Type-C 1.0 reversible connector, USB On-The-Go

2.0, Type-C 1.0 reversible connector

bluetooth

4.2, A2DP, LE

5.0, A2DP, LE

internet

GSM / HSPA / LTE

2G/3G/4G/LTE

wifi

Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot

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

radio

Wireless FM radio (no wired headphones required)

FM Radio

Colors

Onyx Black, Ruby Red, Sapphire Blue

sensors

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

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