In depth comparison and review of Xiaomi MI A3 and Xiaomi Redmi Note 9. 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 9 |
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Product Type | Smartphone | Smartphone | |
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Form Factor | Touch | Touch | |
Height | 153.48 mm | 162.3 mm | Xiaomi Redmi Note 9 has greater height than Xiaomi MI A3. |
Width | 71.85 mm | 77.2 mm | Xiaomi Redmi Note 9 has greater width than Xiaomi MI A3. |
Depth | 8.475 mm | 8.9 mm | Xiaomi MI A3 is narrower than Xiaomi MI A3. |
Weight | 173.8 g | 199 g | Xiaomi MI A3 is lighter than Xiaomi MI A3. |
Body Colour | Kind of grey | Forest green | |
Body Material | Corning Gorilla Glass 5 | - | |
Protection | - | Splashproof | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 2.34 W/kg (limb), 1.097 W/kg (body), 0.301 W/kg (head) | 2.262 W/kg (limb), 1.138 W/kg (body), 0.795 W/kg (head) | |
Integrated Components | - | Ultra-linear speaker | |
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 9 |
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Display Type | OLED display | - | |
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Display Technology | AMOLED | - | |
Screen Size (Display Size) | 6.088" | 6.53" | Xiaomi Redmi Note 9 has larger screen size than Xiaomi MI A3. |
Screen Resolution (Display Resolution) | 1560 x 720 pixels | 2340 x 1080 pixels | Xiaomi Redmi Note 9 has better screen resolution than Xiaomi MI A3. |
Display Format | HD+ | Full HD+ | |
Aspect Ratio | 19.5:9 | 19.5:9 | |
Max Brightness | - | 450 cd/m² | |
Contrast Ratio | 60000:1 | 1500:1 | Xiaomi MI A3 has better display contrast ratio than Xiaomi Redmi Note 9. |
Display Features | 2.5D Glass, Dot Drop display | Reading mode 2.0, Dot Display, Full Screen gestures | |
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 9 |
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Processor Type (CPU) | Qualcomm Snapdragon 665 | MediaTek Helio G85 | |
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Clock Speed | 2 GHz | 2 GHz | Both phones have the same clock speed. |
Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
Graphics System (GPU) | Qualcomm ADRENO 610 | ARM G52 MC2 |
MEMORY | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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RAM | LPDDR4X SDRAM - 4 GB | 3 GB | Xiaomi MI A3 has more RAM than Xiaomi Redmi Note 9. |
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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 | microSD |
CAMERA | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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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) | - | 79.4 degree(s) | |
Pixel Size | 1.6 μm | 0.8 μm | Xiaomi MI A3 has larger camera pixel size than Xiaomi Redmi Note 9. |
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 9 has face detection. |
Light Source | Flash | Flash | |
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, 1280 x 720 (720p) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 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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Sensor Size (2nd Camera) | - | 1/4" | |
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. |
Lens Element Qty (2nd Camera) | - | 5-element | |
Field of View (2nd Camera) | 118 degree(s) | 118 degree(s) | Both phones have the same second camera lens field of view. |
Pixel Size (2nd Camera) | - | 1.2 μm | |
Camera Features (2nd Camera) | - | 5-piece lens |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | 2 Megapixel | 2 Megapixel | Both phones have the same third camera resolution. |
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Lens Aperture (3rd Camera) | - | F/2.4 | |
Pixel Size (3rd Camera) | - | 1.75 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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Sensor Size (4th Camera) | - | 1/5" | |
Lens Aperture (4th Camera) | - | F/2.4 | |
Lens Element Qty (4th Camera) | - | 3-element | |
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 | 13 Megapixel | Xiaomi MI A3 has better front camera resolution than Xiaomi Redmi Note 9. |
Sensor Size (Front) | - | 1/3.06" | |
Lens Aperture (Front) | F/2.0 | F/2.25 | Xiaomi MI A3 has better front lens aperture than Xiaomi MI A3. |
Lens Element Qty (Front) | 5-element | 5-element | |
Field of View (Front) | 79 degree(s) | 74 degree(s) | Xiaomi MI A3 has larger front lens field of view than Xiaomi Redmi Note 9. |
Pixel Size (Front) | 1.6 μm | 1.12 μm | Xiaomi MI A3 has larger front camera pixel size than Xiaomi Redmi Note 9. |
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 | |
Face Recognition (Face ID) | - | Face recognition | Xiaomi Redmi Note 9 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 | Palm shutter, AI silhouette detection |
BATTERY AND CHARGING | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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Battery Capacity (Battery Size) | 4030 mAh | 5020 mAh | Xiaomi Redmi Note 9 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 16 hrs Playback (Music): up to 147 hrs Navigation: up to 16 hrs |
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Battery Technology | - | Lithium polymer |
CELLULAR | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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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. |
Intelligent Assistant | Google Assistant | - | |
Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
COMMUNICATIONS | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | 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, Band 41 | |
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, TDD 2500 | |
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 | - |
MEDIA | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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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) | |
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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 9 |
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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, ambient light sensor, proximity sensor, digital compass, gyro sensor, infrared (IR) sensor | |
Security Devices | Fingerprint reader (under display) | Face recognition, fingerprint reader | |
Additional Phone Features | AI face unlock | Infrared remote control, HyperEngine technology |
OTHERS | Xiaomi MI A3 | Xiaomi Redmi Note 9 |
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Included Accessories | Power adapter, SIM card removal tool, USB-C cable, soft case | Protective cover, power adapter, SIM card removal tool, USB-C cable | |
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Compliant Standards | - | TUV Rheinland Low Blue Light Certification |