Samsung Galaxy M21 6GB/128GB

Realme 7i 8GB/128GB

os

Android 10, One UI 2

Android 10, Realme UI

RAM

6 GB

8 GB

ROM

128 GB

128 GB

expandable

512 GB

512 GB

CPU

Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)

Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)

GPU

Mali-G72 MP3

Adreno 610

SoC

Exynos 9611 (10nm)

Qualcomm SM6115 Snapdragon 662 (11 nm)

number of cores

8core

8core

features

LED flash, panorama, HDR

LED flash, HDR, panorama

primary

Triple:
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8m, PDAF
8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12m
5 MP, f/2.2, (depth)

Quad:
64 MP, f/1.8, 26mm (wide), 1/1.73", 0.8m, PDAF
8 MP, f/2.3, 119, 16mm (ultrawide), 1/4.0", 1.12m
2 MP, f/2.4, (macro)
2 MP, f/2.4, (depth)

secondary

20 MP, f/2.0, 26mm (wide)

16 MP, f/2.1, 26mm (wide), 1/3", 1.0m

video

4K@30fps, 1080p@30fps, gyro-EIS

1080p@30fps, gyro-EIS

Charging

Fast charging 15W

Fast charging 18W

capacity

6000mAh

5000mAh

type

Li-Polymer (non-removable)

Li-Polymer (non-removable)

build

Glass front (Gorilla Glass 3), plastic back, plastic frame

dimension

159 x 75.1 x 8.9 mm

164.1 x 75.5 x 8.9 mm

display

Super AMOLED capacitive touchscreen, 16M colors, 100.5 cm2 (~84.2% screen-to-body ratio)

IPS LCD, 90Hz

protection

Corning Gorilla Glass 3

Corning Gorilla Glass

resolution

1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)

720 x 1600 pixels, 20:9 ratio (~270 ppi density)

screen

6.4"

6.5"

weight

188 gm

188 gm

GPS

Yes, with A-GPS, GLONASS, BDS

Yes, with A-GPS, GLONASS, BDS

USB

2.0, Type-C 1.0 reversible connector

USB Type-C 2.0, USB On-The-Go

bluetooth

5.0, A2DP, LE

5.0, A2DP, LE

internet

2G/3G/4G

2G/3G/4G/LTE

wifi

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

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

radio

FM Radio

Unspecified

sensors

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

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