Xiaomi MI A1 vs. Xiaomi Redmi Note 9S

Phone Comparison, Reviews and Tests

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.

Phone Specifications Comparison

Xiaomi MI A1 vs. Xiaomi Redmi Note 9S Comparison Chart
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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