Home Phone comparison Xiaomi Redmi A2 and Samsung Galaxy M21 - Which is better?

Xiaomi Redmi A2 vs Samsung Galaxy M21

37 out 100
Xiaomi Redmi A2
VS
45 out 100
Samsung Galaxy M21
Xiaomi Redmi A2
Samsung Galaxy M21

Compared 2 smartphones : Xiaomi Redmi A2 Manufactured in March, 2023, with display 6.52 with chipsetMediaTek Helio G36, vs Samsung Galaxy M21, Manufactured in March, 2020 with chipsetSamsung Exynos 7 Octa 9611. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Xiaomi Redmi A2
  • Larger display: 6.52in
  • Includes charger
Reasons to choose Samsung Galaxy M21
  • Higher pixel density: 403ppi
  • Lighter design: 188g vs 192g
  • Higher battery capacity: 6000mAh vs 5000mAh
  • Supports Dolby Atmos
  • Fingerprint scanner

Versions

Available versions and configurations
Memory Options - 2/32 GB
- 2/64 GB
- 3/32 GB
- 3/64 GB
- 4/64 GB		 - 4/64 GB
- 6/128 GB

Review

Key Specs Xiaomi Redmi A2 and Samsung Galaxy M21
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
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Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Xiaomi Redmi A2
vs
Samsung Galaxy M21

Display

Display quality comparison
Type IPS LCD Super AMOLED
Size 6.52 in 6.4 in
Resolution 720x1600 pixels 1080x2340 pixels
Aspect ratio 20:9 19.5:9
Pixel density 269 ppi 403 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 400 nits 630 nits
HDR support No No
Screen-to-body ratio 81.1 % 84.2 %
Features n/a Always-On Display
Display test
Peak brightness (auto)
Xiaomi Redmi A2
374 nits
Samsung Galaxy M21
608 nits
sRGB gamut95 %141.3 %
PWM (Flicker)n/a215 Hz
Response time30 ms9 ms
Contrast1303:1∞ Infinite
Sources: NotebookCheck [Xiaomi Redmi A2], [Samsung Galaxy M21]

Design & Build

Design and ergonomics comparison
Height 164.9 mm (6.49 in) 159 mm (6.26 in)
Width 76.8 mm (3.02 in) 75.1 mm (2.96 in)
Thickness 9.1 mm (0.36 in) 8.9 mm (0.35 in)
Weight 192 g (6.77 oz) 188 g (6.63 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Black
- Blue
- Green		 - Black
- Blue
- Green
Fingerprint sensor No Yes rear
Screen-to-body ratio
Xiaomi Redmi A2
81.1 %
Samsung Galaxy M21
84.2 %

Performance

Testing Xiaomi Redmi A2 and Samsung Galaxy M21 In benchmarks
Processor
Chipset MediaTek Helio G36 Samsung Exynos 7 Octa 9611
Max Frequency 2200 MHz 2300 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.8 (Cortex-A53)
- 4/2.2 (Cortex-A53)		 - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)
Process TSMC Samsung
Transistor Size 12 nm 10 nm
Neural Processor No Yes
Graphics PowerVR GE8320 Mali-G72 MP3
GPU Cores 32 54
GPU Frequency 680 MHz 850 MHz
FLOPS 43.5 GFLOPS 113.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Redmi A2
477
Samsung Galaxy M21
514
Geekbench 6 (Multi-Core)
Xiaomi Redmi A2
1523
Samsung Galaxy M21
1558
Geekbench 6 (Single-Core)477514
Geekbench 6 (Multi-Core)15231558
AnTuTu 10
AnTuTu 10
Xiaomi Redmi A2
131111
Samsung Galaxy M21
266455
CPU4216876468
GPU1783345756
Memory4032770269
UX3078373962
NanoReview Score131111266455
3DMark Wild Life
3DMark Wild Life
Xiaomi Redmi A2
n/a
Samsung Galaxy M21
816
Max Surface Temp.n/a44.1 °C
Stabilityn/a73 %
Graphics Testn/a4 fps
Graphics Scoren/a816
Sources: 3DMark [Samsung Galaxy M21]

Memory

RAM
RAM Size - 2 GB
- 3 GB		 - 4 GB
- 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1600 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity32 GB- 64 GB
- 128 GB
Storage TypeeMMC 5.1UFS 2.1
Memory CardMicroSDMicroSD

Software

OS Android 12 Android 10.0 (Upgradeable to Android 12.0)
OS Size n/a 14.5 GB
UI Skin MIUI 14 One Ui 4.1

Battery

Volume 5000 mAh 6000 mAh
Max Charging Power 10 W 15 W
Battery Type Li-ion Li-ion
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging No Yes Samsung Adaptive Fast Charge (25% in 30 min)
Full Charge Time 2:43 h 2:35 h
Battery Life Test
Battery Life
Xiaomi Redmi A2
n/a
Samsung Galaxy M21
24:03
Web Browsingn/a10:07 h
Video Playbackn/a13:59 h
Gamesn/a05:35 h
Standby Moden/a115 h

Main camera

Matrix 8 MP 48 MP
Photo resolution 3264x2448 pixels 8000x6000 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording No Yes (Up to 30 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
Slow Motion No 240 fps (720p)
Wide-angle lens n/a 123 °
Lenses count Standard: 8 MP
Depth: 0.08 MP		 Standard: 48 MP
Ultra-wide: 8 MP
Depth: 5 MP
Features Bokeh effect - Bokeh effect
- Pro mode
Main lens
Matrix8 MP48 MP
Aperturef/2.0f/2.0
Focal lengthn/a26 mm
Sensorn/aSamsung S5KGM2
Sensor sizen/a1/2.0
Pixel sizen/a0.8 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrixn/a8 MP
Aperturen/af/2.2
Focal lengthn/a12 mm
Sensor sizen/a1/4.0
Pixel sizen/a1.12 μm
Stabilizationn/aDigital

Front camera

Matrix 5 MP 20 MP
Photo resolution 2592x1944 pixels 5184x3888 pixels
Aperture f/2.2 f/2.0
Focal length n/a 26 mm
Sensor CMOS CMOS
Autofocus No No
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 4 (802.11 a/b/g/n) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
Bluetooth version 5 5
Bluetooth features LE PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type Micro USB USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode		 - Charging
- USB Storage Mode
- OTG
GPS - GPS
- GLONASS
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* No Yes
Infrared Port No No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G Bandsn/aGSM850, GSM900, DCS1800, PCS1900
3G Bandsn/aB1 (2100), B2 (1900), B5(850), B8 (900)
LTE Bands*n/aLTE (B1/B3/B5/B7/B8/B20/B38/B40/B41)
LTE category412
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio Yes Yes
Dolby Atmos No Yes
Speaker Test
Max Volume
Xiaomi Redmi A2
79.4 dB
Samsung Galaxy M21
83.8 dB

Other

Class Budget Mid-range
Announced March, 2023 yr March, 2020 yr
Release Date March, 2023 yr March, 2020 yr
Launch Price ($) 115 210
Sensors Accelerometer - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes 10 W n/a
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

No clear favorite identified yet; updates may follow as new data arrives.

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