Home Phone comparison Samsung Galaxy A21s and Xiaomi Redmi Note 9 - Which is better?

Samsung Galaxy A21s vs Xiaomi Redmi Note 9

39 out 100
Samsung Galaxy A21s
VS
43 out 100
Xiaomi Redmi Note 9
Samsung Galaxy A21s
Xiaomi Redmi Note 9

Compared 2 smartphones : Samsung Galaxy A21s Manufactured in June, 2020, with display 6.5 with chipsetSamsung Exynos 850, vs Xiaomi Redmi Note 9, Manufactured in June, 2020 with chipsetMediaTek Helio G85. 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 Samsung Galaxy A21s
  • Lighter design: 192g vs 199g
  • Supports Dolby Atmos
Reasons to choose Xiaomi Redmi Note 9
  • Larger display: 6.53in
  • Higher pixel density: 395ppi
  • Higher battery capacity: 5020mAh vs 5000mAh
  • Infrared port

Versions

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

Review

Key Specs Samsung Galaxy A21s and Xiaomi Redmi Note 9
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.
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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:
Samsung Galaxy A21s
vs
Xiaomi Redmi Note 9

Display

Display quality comparison
Type PLS TFT IPS LCD
Size 6.5 in 6.53 in
Resolution 720x1600 pixels 1080x2340 pixels
Aspect ratio 20:9 19.5:9
Pixel density 270 ppi 395 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 540 nits 450 nits
HDR support No No
Screen-to-body ratio 82.9 % 83.5 %
Display test
Peak brightness (auto)
Samsung Galaxy A21s
487 nits
Xiaomi Redmi Note 9
464 nits
sRGB gamut88.4 %97.7 %
PWM (Flicker)500 Hzn/a
Response time30.4 ms32.2 ms
Contrast1500:14608:1
Sources: NotebookCheck [Samsung Galaxy A21s], [Xiaomi Redmi Note 9]

Design & Build

Design and ergonomics comparison
Height 163.6 mm (6.44 in) 162.3 mm (6.39 in)
Width 75.3 mm (2.96 in) 77.2 mm (3.04 in)
Thickness 8.9 mm (0.35 in) 8.9 mm (0.35 in)
Weight 192 g (6.77 oz) 199 g (7.02 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Black
- Blue
- Red		 - White
- Gray
- Green
Fingerprint sensor Yes rear Yes rear
Screen-to-body ratio
Samsung Galaxy A21s
82.9 %
Xiaomi Redmi Note 9
83.5 %

Performance

Testing Samsung Galaxy A21s and Xiaomi Redmi Note 9 In benchmarks
Processor
Chipset Samsung Exynos 850 MediaTek Helio G85
Max Frequency 2000 MHz 2000 MHz
CPU Cores 8 (8) 8 (2 + 6)
Architecture 8/2 (Cortex-A55) - 6/1.8 (Cortex-A55)
- 2/2 (Cortex-A75)
Process Samsung TSMC
Transistor Size 8 nm 12 nm
Neural Processor No Yes
Graphics Mali-G52 MP1 Mali-G52 MP2
GPU Cores 24 48
GPU Frequency 850 MHz 1000 MHz
FLOPS 40.8 GFLOPS 96 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy A21s
484
Xiaomi Redmi Note 9
516
Geekbench 6 (Multi-Core)
Samsung Galaxy A21s
1523
Xiaomi Redmi Note 9
1562
Geekbench 6 (Single-Core)484516
Geekbench 6 (Multi-Core)15231562
AnTuTu 10
AnTuTu 10
Samsung Galaxy A21s
191375
Xiaomi Redmi Note 9
272057
CPU6874889155
GPU2680749694
Memory5921060565
UX3661072643
NanoReview Score191375272057
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy A21s
425
Xiaomi Redmi Note 9
n/a
Max Surface Temp.43.2 °Cn/a
Stability98 %n/a
Graphics Test2 fpsn/a
Graphics Score425n/a
Sources: 3DMark [Samsung Galaxy A21s]
PCMark 3.0
PCMark 3.0
Samsung Galaxy A21s
5429
Xiaomi Redmi Note 9
n/a
Writing score5426n/a
Web score4708n/a
Video editing5145n/a
Data manipulation3808n/a
NanoReview Score5429n/a

Memory

RAM
RAM Size - 3 GB
- 4 GB		 - 3 GB
- 4 GB
- 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1866 MHz 1800 MHz
Channels 2 2
Storage
Storage Capacity- 32 GB
- 64 GB		- 64 GB
- 128 GB
Storage TypeeMMC 5.1eMMC 5.1
Memory CardMicroSDMicroSD

Software

OS Android 10 (Upgradeable to Android 12) Android 10 (Upgradeable to Android 12)
OS Size 12 GB 16.5 GB
UI Skin One UI 4.1 MIUI 13

Battery

Volume 5000 mAh 5020 mAh
Max Charging Power 15 W 18 W
Battery Type Li-Po Li-Po
Removable No No
Wireless Charging No No
Reverse Charging No Yes
Fast Charging Yes (50% in 60 min) Yes (50% in 40 min)
Full Charge Time 2:10 h 1:30 h
Battery Life Test
Battery Life
Samsung Galaxy A21s
25:00
Xiaomi Redmi Note 9
24:19
Web Browsing09:45 h09:31 h
Video Playback14:13 h14:21 h
Games05:34 h05:45 h
Standby Mode128 h121 h

Main camera

Matrix 48 MP 48 MP
Photo resolution 8000x6000 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 120 fps (720p)
Wide-angle lens 123 ° 118 °
Lenses count Standard: 48 MP
Ultra-wide: 8 MP
Macro: 2 MP
Depth: 2 MP		 Standard: 48 MP
Ultra-wide: 8 MP
Macro: 2 MP
Depth: 2 MP
Features Bokeh effect - Bokeh effect
- Pro mode
Main lens
Matrix48 MP48 MP
Aperturef/2.0f/1.8
Focal length26 mm26 mm
SensorSamsung S5KGM2Samsung S5KGM1
Sensor size1/2.01/2.0
Pixel size0.8 μm0.8 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrix8 MP8 MP
Aperturef/2.2f/2.2
Sensor size1/4.01/4.0
Pixel size1.12 μm1.12 μm
StabilizationDigitalDigital

Front camera

Matrix 13 MP 13 MP
Photo resolution 4128x3096 pixels 4128x3096 pixels
Aperture f/2.2 f/2.3
Focal length n/a 29 mm
Sensor CMOS CMOS
Sensor size 1/3.1 1/3.1
Pixel size 1.12 μm 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 5 (802.11 a/b/g/n/ac) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- 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 PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP LE, HID, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM850, GSM900, DCS1800, PCS1900GSM 850 / 900 / 1800 / 2100 / 2600 / 2300 / 2500
3G BandsB1 (2100), B2 (1900), B5(850), B8 (900)HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
LTE Bands*LTE (B1/B2/B3/B5/B7/B8/B20/B28)LTE (B850/B900/B1800/B2100/B2300/B2500/B2600)
LTE category137
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio Yes Yes
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy A21s
79.5 dB
Xiaomi Redmi Note 9
92.4 dB

Other

Class Budget Mid-range
Announced May, 2020 yr April, 2020 yr
Release Date June, 2020 yr June, 2020 yr
Launch Price ($) 200 199
Sensors - Hall Sensor
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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