Samsung Galaxy M21
#1521
Xiaomi Redmi Note 9 4G
#2048Category Breakdown
Samsung Galaxy M21
Xiaomi Redmi Note 9 4G
Performance
76.578.2
Camera
64.419.1
Display
76.269.9
Battery
37.737.7
Build
89.171.7
Connectivity
62.257.4
Audio
8.987.6
Overall
57.452.2
Summary
- The Samsung Galaxy M21 features a 6.4-inch Super AMOLED display with a resolution of 1080 x 2340 pixels, providing vibrant colors and deeper blacks compared to the Xiaomi Redmi Note 9 4G's 6.53-inch IPS LCD display with the same resolution but lower brightness.
- In terms of performance, the Galaxy M21 is powered by the Exynos 9611 chipset, while the Redmi Note 9 4G utilizes the Snapdragon 662, both offering adequate performance for daily tasks.
- The camera systems are similar, with both having a 48 MP main sensor, but the M21 offers better video recording capabilities at 4K, whereas the Note 9 4G is limited to 1080p.
- Both devices have a substantial 6000 mAh battery, but the Redmi Note 9 4G supports slightly faster charging at 18W compared to the M21's 15W.
- Build quality is comparable, with both featuring Gorilla Glass 3 on the front and plastic backs, though the M21 is slightly lighter.
- Software-wise, the M21 runs on One UI 3.1 Core based on Android 10, while the Redmi Note 9 4G operates on MIUI 14, upgradable to Android 12, offering different user experiences.
Side-by-side Specification Comparison
Samsung Galaxy M21
Xiaomi Redmi Note 9 4G
General
Release Date
2020, March 18
2020, November 26
Announced
2020, March 18
2020, November 26
Description
N/A
N/A
Display
Size
6.4"
6.53"
Type
Super AMOLED, 420 nits (peak)
IPS LCD, 400 nits (typ)
Resolution
1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density)
PPI
1080
1080
Refresh Rate
60Hz
60Hz
HDR Support
✗
✗
Protection
Corning Gorilla Glass 3
Corning Gorilla Glass 3
Performance
Chipset
Exynos 9611 (10 nm)
Qualcomm SM6115 Snapdragon 662 (11 nm)
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
Memory
64GB 4GB RAM, 128GB 6GB RAM
128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (dedicated slot)
microSDXC (dedicated slot)
Camera
Main Camera
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm5 MP, f/2.2, (depth)
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF8 MP, f/2.2, 120˚ (ultrawide), 1/4.0", 1.12µm2 MP, f/2.4, (depth)
Main Camera Features
LED flash, panorama, HDR
LED flash, HDR, panorama
Front Camera
20 MP, f/2.2, 26mm (wide)
8 MP, f/2.0, 27mm (wide), 1/4.0", 1.12µm
Front Camera Features
HDR
N/A
Video Recording
4K@30fps, 1080p@30fps, 720p@240fps, gyro-EIS
1080p@30fps
Selfie Video
1080p@30fps
1080p@30fps
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
6000 mAh
6000 mAh
Battery Details
Li-Po 6000 mAh
Li-Po 6000 mAh
Charging Details
15W wired
18W wired2.5W reverse wired
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
159 x 75.1 x 8.9 mm (6.26 x 2.96 x 0.35 in)
162.3 x 77.3 x 9.6 mm (6.39 x 3.04 x 0.38 in)
Weight
188 g
198 g
Materials
Glass front (Gorilla Glass 3), plastic back, plastic frame
Glass front (Gorilla Glass 3), plastic frame, plastic back
Colors
Midnight Blue, Raven Black
Gray, Green, Blue, Orange
Foldable
✗
✗
SAR
0.47 W/kg (head)
N/A
Connectivity
SIM
Nano-SIMNano-SIM + Nano-SIM
Nano-SIM + Nano-SIM
Network
GSM / HSPA / LTE
GSM / CDMA / HSPA / LTE
Network Speed
HSPA, LTE
HSPA, LTE
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
4.2, A2DP
NFC
✓
✗
USB
USB Type-C 2.0
USB Type-C 2.0, OTG
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, GLONASS, GALILEO, BDS
GPS, GLONASS, GALILEO, BDS
Audio
Stereo Speakers
✗
✓
Loudspeaker
Yes
Yes, with stereo speakers
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 10, upgradable to Android 11, One UI 3.1 Core
Android 10, upgradable to Android 12, MIUI 14
Fingerprint
✓
✓
Face Unlock
✗
✗
Sensors
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Fingerprint (side-mounted), accelerometer, proximity, compass