In depth comparison and review of Xiaomi MI A3 and Xiaomi Redmi Note 9S. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
DESIGN AND DIMENSIONS | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Product Type | Smartphone | Smartphone | |
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Form Factor | Touch | Touch | |
Height | 153.48 mm | 165.75 mm | Xiaomi Redmi Note 9S has greater height than Xiaomi MI A3. |
Width | 71.85 mm | 76.68 mm | Xiaomi Redmi Note 9S has greater width than Xiaomi MI A3. |
Depth | 8.475 mm | 8.8 mm | Xiaomi MI A3 is narrower than Xiaomi MI A3. |
Weight | 173.8 g | 209 g | Xiaomi MI A3 is lighter than Xiaomi MI A3. |
Body Colour | Kind of grey | Aurora blue | |
Body Material | Corning Gorilla Glass 5 | Curved 3D glass, Gorilla glass 5 | |
Protection | - | Dustproof, splashproof | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 2.34 W/kg (limb), 1.097 W/kg (body), 0.301 W/kg (head) | 0.98 W/kg (body), 0.72 W/kg (head), 2.35 W/kg (limb) | |
Integrated Components | - | Ultra-linear speakers | |
Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
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SIM Card Type (Size) | Nano SIM | Nano SIM | |
SIM Card Qty | Dual-SIM | Dual-SIM | |
SIM Card Configuration Details | - | Nano SIM + nano SIM/microSD |
DISPLAY | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Display Type | OLED display | LCD display | |
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Display Technology | AMOLED | - | |
Screen Size (Display Size) | 6.088" | 6.67" | Xiaomi Redmi Note 9S has larger screen size than Xiaomi MI A3. |
Screen Resolution (Display Resolution) | 1560 x 720 pixels | 2400 x 1080 pixels | Xiaomi Redmi Note 9S has better screen resolution than Xiaomi MI A3. |
Display Format | HD+ | Full HD+ | |
Aspect Ratio | 19.5:9 | - | |
Contrast Ratio | 60000:1 | 1500:1 | Xiaomi MI A3 has better display contrast ratio than Xiaomi Redmi Note 9S. |
HDR | - | Yes | Xiaomi Redmi Note 9S has HDR. |
Display Features | 2.5D Glass, Dot Drop display | Reading mode 2.0, Dot Display | |
Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | Corning Gorilla Glass 5 (scratch resistant glass) |
PROCESSOR | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Processor Type (CPU) | Qualcomm Snapdragon 665 | Qualcomm Snapdragon 720G | |
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Clock Speed | 2 GHz | 2.3 GHz | Xiaomi Redmi Note 9S has higher clock speed than Xiaomi MI A3. |
Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
64-bit Architecture | - | Yes | Xiaomi Redmi Note 9S has 64-bit architecture. |
Graphics System (GPU) | Qualcomm ADRENO 610 | Qualcomm ADRENO 618 |
MEMORY | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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RAM | LPDDR4X SDRAM - 4 GB | 4 GB | Both phones have the same RAM size. |
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Internal Memory Size (Storage Capacity) | 64 GB | 64 GB | Both phones have the same internal memory capacity. |
Supported Flash Memory Cards (Expandable Memory) | Up to 256 GB | microSDHC, microSDXC - up to 512 GB |
CAMERA | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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MAIN CAMERA |
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Number of Main Cameras | 3 | 4 | |
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Sensor Resolution | 48 Megapixel | 48 Megapixel | Both phones have the same camera resolution. |
Sensor Size | 1/2" | 1/2" | Both phones have the same camera sensor size. |
Lens Aperture | F/1.79 | F/1.79 | Both phones have the same camera lens aperture. |
Lens Construction | 6-element | 6-element | |
Field of View (FoV) | - | 79 degree(s) | |
Pixel Size | 1.6 μm | 0.8 μm | Xiaomi MI A3 has larger camera pixel size than Xiaomi Redmi Note 9S. |
Focus Adjustment | Automatic | Automatic | |
Special Effects | - | HDR, Kaleidoscope | |
Camera Modes | AI portrait mode | Burst mode, Panorama, night mode, Smart ultra-wide angle mode, Photo timer, Custom watermark, Documents, Beautify, Levelling, Cinematic portraits | |
Face Recognition (Face ID) | - | Face recognition | Xiaomi Redmi Note 9S has face detection. |
Light Source | Flash | Dual LED flash | |
Still Image Resolutions | - | 8000 x 6000 | |
Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 960 fps | |
Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), Electronic Image Stabiliser (EIS), 4-in-1 Super Pixel, AI scene detection, AI Triple camera, 27 different scenes | 4-in-1 Super Pixel, AI scene detection, Portrait mode with background blurring, Ultra wide-angle edge distortion correction, Steady handheld night photography, full screen frame, AI watermark |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 8 Megapixel | 8 Megapixel | Both phones have the same second camera resolution. |
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Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
Field of View (2nd Camera) | 118 degree(s) | 119 degree(s) | Xiaomi Redmi Note 9S has larger second camera lens field of view than Xiaomi MI A3. |
Pixel Size (2nd Camera) | - | 1.12 μm |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | 2 Megapixel | 5 Megapixel | Xiaomi Redmi Note 9S has higher resolution third camera than Xiaomi MI A3. |
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Lens Aperture (3rd Camera) | - | F/2.4 | |
Pixel Size (3rd Camera) | - | 1.12 μm | |
Camera Functions (3rd Camera) | Depth camera | Macro camera | |
Camera Features (3rd Camera) | - | AF (2cm-10cm) |
FOURTH CAMERA |
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Sensor Resolution (4th Camera) | - | 2 Megapixel | |
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Lens Aperture (4th Camera) | - | F/2.4 | |
Pixel Size (4th Camera) | - | 1.75 μm | |
Camera Functions (4th Camera) | - | Depth camera |
FRONT CAMERA |
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Number of Front Cameras | 1 | 1 | |
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Sensor Resolution (Front) | 32 Megapixel | 16 Megapixel | Xiaomi MI A3 has better front camera resolution than Xiaomi Redmi Note 9S. |
Lens Aperture (Front) | F/2.0 | F/2.48 | Xiaomi MI A3 has better front lens aperture than Xiaomi MI A3. |
Lens Element Qty (Front) | 5-element | - | |
Field of View (Front) | 79 degree(s) | - | |
Pixel Size (Front) | 1.6 μm | 1 μm | Xiaomi MI A3 has larger front camera pixel size than Xiaomi Redmi Note 9S. |
Focus Adjustment | Focus free | - | |
Special Effects (Front) | - | HDR | |
Camera Modes (Front) | Selfie panorama, AI portrait mode, AI Beautify | Panoramic selfies, AI portrait mode, AI Beautify, Slo-mo Selfie | |
Face Recognition (Face ID) | - | Face recognition | Xiaomi Redmi Note 9S has face detection. |
Light Source (Front) | - | Display flash | |
Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | - | |
Camera Features (Front) | 4-in-1 Super Pixel technology, AI scene detection, 12 different scenes, AI Selfie, Palm shutter, AI face unlock | AI scene detection, Palm shutter, AI silhouette detection |
BATTERY AND CHARGING | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Battery Capacity (Battery Size) | 4030 mAh | 5020 mAh | Xiaomi Redmi Note 9S has larger battery capacity than Xiaomi MI A3. |
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Fast Charging Technology | Qualcomm Quick Charge 3.0 | - | Xiaomi MI A3 has fast charging technology. |
Talk Time | - | 1980 minutes | |
Run Time Details | - | Talk: up to 1980 min Gaming: up to 13 hrs Playback (Music): up to 147 hrs Navigation: up to 16 hrs |
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Battery Technology | - | Lithium Ion |
CELLULAR | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
User Interface | - | MIUI 10 | |
Intelligent Assistant | Google Assistant | - | |
Payment Technology | - | Google Pay | |
Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
COMMUNICATIONS | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | |
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2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1900 GSM, 2100 GSM | |
3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 1700, 850, 900 | |
4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40 | |
4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300 | |
Wireless Interface | Infrared (IrDA), IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
Messaging Services | SMS, MMS | SMS, MMS |
MEDIA | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Supported Digital Audio Standards | WAV, AAC, PCM, MP3, FLAC, AAC +, eAAC+, AMR-WB, AMR-NB | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio), MP4 | |
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Supported Digital Video Standards | MKV, XviD, H.264, M4V, MPEG4-ASP, MPEG-4 SP, MP4 | MKV, XviD, M4V, MP4 | |
Audio Amplifier | - | Smart PA |
FEATURES | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
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Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, vibration sensor | Accelerometer, digital compass, gyro sensor, distance sensor, infrared (IR) sensor, In-screen ambient light sensor | |
Security Devices | Fingerprint reader (under display) | Face recognition, fingerprint reader (side) | |
Security Technology | - | A.I. face recognition | |
Additional Phone Features | AI face unlock | Infrared remote control, AI face unlock, Qualcomm 5th generation AI Engine, Z-axis linear vibration motor |
OTHERS | Xiaomi MI A3 | Xiaomi Redmi Note 9S |
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Included Accessories | Power adapter, SIM card removal tool, USB-C cable, soft case | Protective cover, SIM card removal tool, USB-C cable, 18W charger | |
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Compliant Standards | - | TUV Rheinland |