Home Phone comparison Xiaomi Redmi A2 and Samsung Galaxy A21s - Which is better?

Xiaomi Redmi A2 vs Samsung Galaxy A21s

37 out 100
Xiaomi Redmi A2
VS
39 out 100
Samsung Galaxy A21s
Xiaomi Redmi A2
Samsung Galaxy A21s

Compared 2 smartphones : Xiaomi Redmi A2 Manufactured in March, 2023, with display 6.52 with chipsetMediaTek Helio G36, vs Samsung Galaxy A21s, Manufactured in June, 2020 with chipsetSamsung Exynos 850. 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 A21s
  • Higher pixel density: 270ppi
  • 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		 - 2/32 GB
- 3/32 GB
- 3/64 GB
- 3/128 GB
- 4/32 GB
- 4/64 GB
- 4/128 GB
- 6/64 GB
- 6/128 GB

Review

Key Specs Xiaomi Redmi A2 and Samsung Galaxy A21s
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
Adjust each parameter’s importance to find the best match for you.
Customize your score
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 A21s

Display

Display quality comparison
Type IPS LCD PLS TFT
Size 6.52 in 6.5 in
Resolution 720x1600 pixels 720x1600 pixels
Aspect ratio 20:9 20:9
Pixel density 269 ppi 270 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 400 nits 540 nits
HDR support No No
Screen-to-body ratio 81.1 % 82.9 %
Display test
Peak brightness (auto)
Xiaomi Redmi A2
374 nits
Samsung Galaxy A21s
487 nits
sRGB gamut95 %88.4 %
PWM (Flicker)n/a500 Hz
Response time30 ms30.4 ms
Contrast1303:11500:1
Sources: NotebookCheck [Xiaomi Redmi A2], [Samsung Galaxy A21s]

Design & Build

Design and ergonomics comparison
Height 164.9 mm (6.49 in) 163.6 mm (6.44 in)
Width 76.8 mm (3.02 in) 75.3 mm (2.96 in)
Thickness 9.1 mm (0.36 in) 8.9 mm (0.35 in)
Weight 192 g (6.77 oz) 192 g (6.77 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Black
- Blue
- Green		 - Black
- Blue
- Red
Fingerprint sensor No Yes rear
Screen-to-body ratio
Xiaomi Redmi A2
81.1 %
Samsung Galaxy A21s
82.9 %

Performance

Testing Xiaomi Redmi A2 and Samsung Galaxy A21s In benchmarks
Processor
Chipset MediaTek Helio G36 Samsung Exynos 850
Max Frequency 2200 MHz 2000 MHz
CPU Cores 8 (4 + 4) 8 (8)
Architecture - 4/1.8 (Cortex-A53)
- 4/2.2 (Cortex-A53)		 8/2 (Cortex-A55)
Process TSMC Samsung
Transistor Size 12 nm 8 nm
Neural Processor No No
Graphics PowerVR GE8320 Mali-G52 MP1
GPU Cores 32 24
GPU Frequency 680 MHz 850 MHz
FLOPS 43.5 GFLOPS 40.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Redmi A2
477
Samsung Galaxy A21s
484
Geekbench 6 (Multi-Core)
Xiaomi Redmi A2
1523
Samsung Galaxy A21s
1523
Geekbench 6 (Single-Core)477484
Geekbench 6 (Multi-Core)15231523
AnTuTu 10
AnTuTu 10
Xiaomi Redmi A2
131111
Samsung Galaxy A21s
191375
CPU4216868748
GPU1783326807
Memory4032759210
UX3078336610
NanoReview Score131111191375
3DMark Wild Life
3DMark Wild Life
Xiaomi Redmi A2
n/a
Samsung Galaxy A21s
425
Max Surface Temp.n/a43.2 °C
Stabilityn/a98 %
Graphics Testn/a2 fps
Graphics Scoren/a425
Sources: 3DMark [Samsung Galaxy A21s]
PCMark 3.0
PCMark 3.0
Xiaomi Redmi A2
n/a
Samsung Galaxy A21s
5429
Writing scoren/a5426
Web scoren/a4708
Video editingn/a5145
Data manipulationn/a3808
NanoReview Scoren/a5429

Memory

RAM
RAM Size - 2 GB
- 3 GB		 - 3 GB
- 4 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1600 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity32 GB- 32 GB
- 64 GB
Storage TypeeMMC 5.1eMMC 5.1
Memory CardMicroSDMicroSD

Software

OS Android 12 Android 10 (Upgradeable to Android 12)
OS Size n/a 12 GB
UI Skin MIUI 14 One UI 4.1

Battery

Volume 5000 mAh 5000 mAh
Max Charging Power 10 W 15 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging No Yes (50% in 60 min)
Full Charge Time 2:43 h 2:10 h
Battery Life Test
Battery Life
Xiaomi Redmi A2
n/a
Samsung Galaxy A21s
25:00
Web Browsingn/a09:45 h
Video Playbackn/a14:13 h
Gamesn/a05:34 h
Standby Moden/a128 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 No
1080p Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
Slow Motion No No
Wide-angle lens n/a 123 °
Lenses count Standard: 8 MP
Depth: 0.08 MP		 Standard: 48 MP
Ultra-wide: 8 MP
Macro: 2 MP
Depth: 2 MP
Features Bokeh effect Bokeh effect
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
Sensor sizen/a1/4.0
Pixel sizen/a1.12 μm
Stabilizationn/aDigital

Front camera

Matrix 5 MP 13 MP
Photo resolution 2592x1944 pixels 4128x3096 pixels
Aperture f/2.2 f/2.2
Sensor CMOS CMOS
Sensor size n/a 1/3.1
Pixel size n/a 1.12 μm
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
- Wi-Fi Display
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/B2/B3/B5/B7/B8/B20/B28)
LTE category413
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 A21s
79.5 dB

Other

Class Budget Budget
Announced March, 2023 yr May, 2020 yr
Release Date March, 2023 yr June, 2020 yr
Launch Price ($) 115 200
Sensors Accelerometer - Hall Sensor
- 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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