In depth comparison and review of Xiaomi Redmi S2 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 Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 160.73 mm | 162.3 mm | Xiaomi Redmi Note 9 has greater height than Xiaomi Redmi S2. |
| Width | 77.26 mm | 77.2 mm | Xiaomi Redmi S2 has greater width than Xiaomi Redmi Note 9. |
| Depth | 8.1 mm | 8.9 mm | Xiaomi Redmi S2 is narrower than Xiaomi Redmi S2. |
| Weight | 170 g | 199 g | Xiaomi Redmi S2 is lighter than Xiaomi Redmi S2. |
| Body Colour | Grey | Blue | Rose gold | Gold | Black | Dark grey | Forest green | |
| Protection | - | Splashproof | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.577 W/kg (body), 0.429 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 | Micro-USB - 5 pin Micro-USB Type B 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 |
| DISPLAY | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Display Type | LCD display | - | |
|---|---|---|---|
| Screen Size (Display Size) | 5.99" | 6.53" | Xiaomi Redmi Note 9 has larger screen size than Xiaomi Redmi S2. |
| Screen Resolution (Display Resolution) | 1440 x 720 pixels | 2340 x 1080 pixels | Xiaomi Redmi Note 9 has better screen resolution than Xiaomi Redmi S2. |
| Display Format | HD+ | Full HD+ | |
| Pixel Density | 269 ppi | - | |
| Aspect Ratio | 18:9 | 19.5:9 | |
| Max Brightness | 450 cd/m² | 450 cd/m² | Both phones have the same display brightness |
| Colour Depth | 16.7 million colours | - | |
| Contrast Ratio | 1000:1 | 1500:1 | Xiaomi Redmi Note 9 has better display contrast ratio than Xiaomi Redmi S2. |
| Display Features | Night Display, Sunlight Display, Reading mode, Colour temperature adjustment | Reading mode 2.0, Dot Display, Full Screen gestures | |
| Display Protection (Screen Protector) | - | Corning Gorilla Glass 5 (scratch resistant glass) |
| PROCESSOR | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 625 | MediaTek Helio G85 | |
|---|---|---|---|
| Clock Speed | - | 2 GHz | |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi Redmi S2 has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 506 | ARM G52 MC2 |
| MEMORY | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| RAM | 3 GB | 3 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 64 GB | Xiaomi Redmi Note 9 has more internal memory than Xiaomi Redmi S2. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | microSD |
| CAMERA | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 48 Megapixel | Xiaomi Redmi Note 9 has better camera resolution than Xiaomi Redmi S2. |
| Sensor Size | - | 1/2" | |
| Lens Aperture | F/2.2 | F/1.79 | Xiaomi Redmi Note 9 has better lens aperture than Xiaomi Redmi S2. |
| Lens Construction | - | 6-element | |
| Field of View (FoV) | - | 79.4 degree(s) | |
| Pixel Size | - | 0.8 μm | |
| Focus Adjustment | Automatic | Automatic | |
| Special Effects | HDR, low light enhancement | HDR, Kaleidoscope | |
| Camera Modes | Panorama, portrait mode, 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 | Face recognition | Both phones have face detection. |
| Light Source | LED flash | Flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 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), AI Dual camera | 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) | 5 Megapixel | 8 Megapixel | Xiaomi Redmi Note 9 has better second camera resolution than Xiaomi Redmi S2. |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/4" | |
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Lens Element Qty (2nd Camera) | - | 5-element | |
| Field of View (2nd Camera) | - | 118 degree(s) | |
| Pixel Size (2nd Camera) | - | 1.2 μm | |
| Camera Features (2nd Camera) | - | 5-piece lens |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Pixel Size (3rd Camera) | - | 1.75 μm | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | AF (2cm-10cm) |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 2 Megapixel | |
|---|---|---|---|
| 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 |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 16 Megapixel | 13 Megapixel | Xiaomi Redmi S2 has better front camera resolution than Xiaomi Redmi Note 9. |
| Sensor Size (Front) | - | 1/3.06" | |
| Lens Type (Front) | Wide-angle lens | - | |
| Lens Aperture (Front) | F/2.0 | F/2.25 | Xiaomi Redmi S2 has better front lens aperture than Xiaomi Redmi S2. |
| Lens Element Qty (Front) | - | 5-element | |
| Field of View (Front) | - | 74 degree(s) | |
| Pixel Size (Front) | - | 1.12 μm | |
| Special Effects (Front) | Precise bokeh effect, AI Beautify 4.0 | HDR | |
| HDR Mode (Front) | Auto HDR mode | - | |
| Camera Modes (Front) | Wide selfie mode | Panoramic selfies, AI portrait mode, AI Beautify | |
| Face Recognition (Face ID) | - | Face recognition | Xiaomi Redmi Note 9 has face detection. |
| Light Source (Front) | LED flash | Display flash | |
| Camera Features (Front) | - | Palm shutter, AI silhouette detection |
| BATTERY AND CHARGING | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Battery Capacity (Battery Size) | 3080 mAh | 5020 mAh | Xiaomi Redmi Note 9 has larger battery capacity than Xiaomi Redmi S2. |
|---|---|---|---|
| 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 |
|
| Battery Technology | - | Lithium polymer |
| CELLULAR | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| User Interface | MIUI 9 | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, TDD-LTE | 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, Band 41 | |
| 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, TDD 2500 | |
| Wireless Interface | Infrared (IrDA), IEEE 802.11b/g/n | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 4.2 | Bluetooth 5.0 | |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Supported Digital Audio Standards | WAV, AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), DSD, AMR-WB, AMR-NB | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio) | |
|---|---|---|---|
| Supported Digital Video Standards | VC-1, XviD, MPEG-4, H.264, M4V, HEVC, H.265, ASP | MKV, XviD, M4V, MP4 | |
| Audio Amplifier | - | Smart PA |
| FEATURES | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| 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, digital compass, gyro sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, infrared (IR) sensor | |
| Security Devices | Face recognition, fingerprint reader | Face recognition, fingerprint reader | |
| Additional Phone Features | Infrared remote control, Dual microphones | Infrared remote control, HyperEngine technology |
| OTHERS | Xiaomi Redmi S2 | Xiaomi Redmi Note 9 |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool, clear soft case | Protective cover, power adapter, SIM card removal tool, USB-C cable | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland Low Blue Light Certification |
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