Detailed comparison and review of Xiaomi MI A1 and Xiaomi Redmi Note 9S. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.
| DESIGN AND DIMENSIONS | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 155.4 mm | 165.75 mm | Xiaomi Redmi Note 9S has greater height than Xiaomi MI A1. |
| Width | 75.8 mm | 76.68 mm | Xiaomi Redmi Note 9S has greater width than Xiaomi MI A1. |
| Depth | 7.3 mm | 8.8 mm | Xiaomi MI A1 is narrower than Xiaomi MI A1. |
| Weight | 165 g | 209 g | Xiaomi MI A1 is lighter than Xiaomi MI A1. |
| Body Colour | Black | Aurora blue | |
| Body Material | Metal | Curved 3D glass, Gorilla glass 5 | |
| Protection | - | Dustproof, splashproof | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.76 W/kg (body), 1.75 W/kg (head) | 0.98 W/kg (body), 0.72 W/kg (head), 2.35 W/kg (limb) | |
| Integrated Components | FM radio | 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 |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Nano SIM + nano SIM/microSD | Nano SIM + nano SIM/microSD |
| DISPLAY | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | LTPS IPS | - | |
| Screen Size (Display Size) | 5.5" | 6.67" | Xiaomi Redmi Note 9S has larger screen size than Xiaomi MI A1. |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 2400 x 1080 pixels | Xiaomi Redmi Note 9S has better screen resolution than Xiaomi MI A1. |
| Display Format | Full HD | Full HD+ | |
| Pixel Density | 403 ppi | - | |
| Max Brightness | 450 cd/m² | - | |
| Contrast Ratio | - | 1500:1 | |
| HDR | - | Yes | Xiaomi Redmi Note 9S has HDR. |
| Display Features | 2.5D curved glass | Reading mode 2.0, Dot Display | |
| Display Protection (Screen Protector) | Corning Gorilla Glass (scratch resistant glass) | Corning Gorilla Glass 5 (scratch resistant glass) |
| PROCESSOR | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 720G | |
|---|---|---|---|
| Clock Speed | 2 GHz | 2.3 GHz | Xiaomi Redmi Note 9S has higher clock speed than Xiaomi MI A1. |
| 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 506 | Qualcomm ADRENO 618 |
| MEMORY | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| RAM | 4 GB | 4 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 64 GB | Xiaomi Redmi Note 9S has more internal memory than Xiaomi MI A1. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSDHC, microSDXC - up to 512 GB |
| CAMERA | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 48 Megapixel | Xiaomi Redmi Note 9S has better camera resolution than Xiaomi MI A1. |
| Sensor Size | - | 1/2" | |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/2.2 | F/1.79 | Xiaomi Redmi Note 9S has better lens aperture than Xiaomi MI A1. |
| Lens Construction | 5-element | 6-element | |
| Field of View (FoV) | - | 79 degree(s) | |
| Pixel Size | - | 0.8 μm | |
| Focus Adjustment | Automatic | Automatic | |
| Optical Zoom | 2x | - | |
| Digital Zoom | 10x | - | |
| Special Effects | HDR, Beautify 3.0 | HDR, Kaleidoscope | |
| Camera Modes | Panorama, Continuous shot, low-light shots | 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 | Face recognition | Both phones have face detection. |
| Light Source | Dual LED flash | Dual LED flash | |
| Still Image Resolutions | - | 8000 x 6000 | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 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), geotagging, Two-tone flash | 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 |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 8 Megapixel | Xiaomi MI A1 has better second camera resolution than Xiaomi Redmi Note 9S. |
|---|---|---|---|
| Lens Type (2nd Camera) | Telephoto lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.6 | F/2.2 | Xiaomi Redmi Note 9S has better second camera lens aperture than Xiaomi MI A1. |
| Field of View (2nd Camera) | - | 119 degree(s) | |
| Pixel Size (2nd Camera) | - | 1.12 μm |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 5 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Pixel Size (3rd Camera) | - | 1.12 μm | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | AF (2cm-10cm) |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.4 | |
| Pixel Size (4th Camera) | - | 1.75 μm | |
| Camera Functions (4th Camera) | - | Depth camera |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 16 Megapixel | Xiaomi Redmi Note 9S has better front camera resolution than Xiaomi MI A1. |
| Lens Aperture (Front) | - | F/2.48 | |
| Pixel Size (Front) | - | 1 μm | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | Beautify with 36 smart beauty profiles | Panoramic selfies, AI portrait mode, AI Beautify, Slo-mo Selfie | |
| Face Recognition (Face ID) | Face recognition | Face recognition | Both phones have face detection. |
| Light Source (Front) | - | Display flash | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) | - | |
| Camera Features (Front) | Self-timer | AI scene detection, Palm shutter, AI silhouette detection |
| BATTERY AND CHARGING | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| Battery Capacity (Battery Size) | 3080 mAh | 5020 mAh | Xiaomi Redmi Note 9S has larger battery capacity than Xiaomi MI A1. |
|---|---|---|---|
| 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 |
|
| Battery Technology | Lithium Ion | Lithium Ion |
| CELLULAR | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Google Android | - | |
| 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 A1 | Xiaomi Redmi Note 9S |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 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 5, Band 8 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 850, 900 | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 1, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, 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 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, 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 4.2 | Bluetooth 5.0 | |
| Bluetooth Profiles | HID | - | |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| 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 | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, XviD, MPEG-4, M4V | MKV, XviD, M4V, MP4 | |
| Sound Enhancements | Dirac HD Sound | - | |
| Audio Amplifier | - | Smart PA |
| FEATURES | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| 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 | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor | Accelerometer, digital compass, gyro sensor, distance sensor, infrared (IR) sensor, In-screen ambient light sensor | |
| Security Devices | Fingerprint reader | Face recognition, fingerprint reader (side) | |
| Security Technology | - | A.I. face recognition | |
| Additional Phone Features | Noise suppression by Fortemedia | Infrared remote control, AI face unlock, Qualcomm 5th generation AI Engine, Z-axis linear vibration motor |
| OTHERS | Xiaomi MI A1 | Xiaomi Redmi Note 9S |
|---|
| Included Accessories | Power adapter | Protective cover, SIM card removal tool, USB-C cable, 18W charger | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland |
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