In depth comparison and review of Xiaomi Redmi Note 9 and Realme C31. 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 Note 9 | Realme C31 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | RMX3501 | |
| Form Factor | Touch | Touch | |
| Height | 162.3 mm | 164.7 mm | Realme C31 has greater height than Xiaomi Redmi Note 9. |
| Width | 77.2 mm | 76.1 mm | Xiaomi Redmi Note 9 has greater width than Realme C31. |
| Depth | 8.9 mm | 8.4 mm | Realme C31 is narrower than Xiaomi Redmi Note 9. |
| Weight | 199 g | 197 g | Realme C31 is lighter than Xiaomi Redmi Note 9. |
| Body Colour | Forest green | Light silver | Dark green | |
| Protection | Splashproof | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 2.262 W/kg (limb), 1.138 W/kg (body), 0.795 W/kg (head) | 1.147 W/kg (body), 0.957 W/kg (head), 2.663 W/kg (limb) | |
| Integrated Components | Ultra-linear speaker | - | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
Micro-USB - 5 pin Micro-USB Type B 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 Note 9 | Realme C31 |
|---|
| Screen Size (Display Size) | 6.53" | 6.5" | Xiaomi Redmi Note 9 has larger screen size than Realme C31. |
|---|---|---|---|
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1600 x 720 pixels | Xiaomi Redmi Note 9 has better screen resolution than Realme C31. |
| Display Format | Full HD+ | HD+ | |
| Aspect Ratio | 19.5:9 | 20:9 | |
| Max Brightness | 450 cd/m² | - | |
| Colour Depth | - | 16.7 million colours | |
| Contrast Ratio | 1500:1 | - | |
| Display Refresh Rate | - | 60 Hz | |
| Touch Sampling Rate | - | 120 Hz | |
| Display Features | Reading mode 2.0, Dot Display, Full Screen gestures | Ultra-clear View | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | - |
| PROCESSOR | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| Processor Type (CPU) | MediaTek Helio G85 | Unisoc | |
|---|---|---|---|
| Processor Number | - | T612 | |
| Clock Speed | 2 GHz | 1.82 GHz | Xiaomi Redmi Note 9 has higher clock speed than Realme C31. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | ARM G52 MC2 | ARM Mali-G57 |
| MEMORY | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| RAM | 3 GB | LPDDR4X SDRAM - 4 GB + up to 7 GB virtual extension | Realme C31 has more RAM than Xiaomi Redmi Note 9. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 64 GB | Both phones have the same internal memory capacity. |
| Memory Interface | - | UFS 2.2 | |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSDHC, microSD, microSDXC - up to 1 TB |
| CAMERA | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 13 Megapixel | Xiaomi Redmi Note 9 has better camera resolution than Realme C31. |
| Sensor Size | 1/2" | - | |
| Lens Aperture | F/1.79 | F/2.2 | Xiaomi Redmi Note 9 has better lens aperture than Xiaomi Redmi Note 9. |
| Lens Construction | 6-element | 5-element | |
| Field of View (FoV) | 79.4 degree(s) | - | |
| Pixel Size | 0.8 μm | - | |
| Focus Adjustment | Automatic | Automatic | |
| Special Effects | HDR, Kaleidoscope | HDR | |
| Camera Modes | Burst mode, Panorama, night mode, Smart ultra-wide angle mode, Photo timer, Custom watermark, Documents, Beautify, Levelling, Cinematic portraits | Burst mode, Panorama, Time-lapse mode, Pro mode, Portrait, Filter mode, Macro mode, Night Pro | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9 has face detection. |
| Light Source | Flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) 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, 854 x 480 (480p) at 30 fps | |
| Camera Features (Functions) | 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 | AI Triple camera |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 2 Megapixel | Xiaomi Redmi Note 9 has better second camera resolution than Realme C31. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/4" | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.4 | Xiaomi Redmi Note 9 has better second camera lens aperture than Xiaomi Redmi Note 9. |
| Lens Element Qty (2nd Camera) | 5-element | - | |
| Field of View (2nd Camera) | 118 degree(s) | - | |
| Pixel Size (2nd Camera) | 1.2 μm | - | |
| Camera Functions (2nd Camera) | - | Macro camera | |
| Camera Features (2nd Camera) | 5-piece lens | 4cm macro photography |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 0.3 Megapixel | Xiaomi Redmi Note 9 has higher resolution third camera than Realme C31. |
|---|---|---|---|
| Lens Aperture (3rd Camera) | F/2.4 | F/2.8 | Xiaomi Redmi Note 9 has better third camera lens aperture than Xiaomi Redmi Note 9. |
| Pixel Size (3rd Camera) | 1.75 μm | - | |
| Camera Functions (3rd Camera) | Macro camera | B&W lens | |
| 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) | 13 Megapixel | 5 Megapixel | Xiaomi Redmi Note 9 has better front camera resolution than Realme C31. |
| Sensor Size (Front) | 1/3.06" | - | |
| Lens Aperture (Front) | F/2.25 | F/2.2 | Realme C31 has better front lens aperture than Xiaomi Redmi Note 9. |
| Lens Element Qty (Front) | 5-element | 3-element | |
| Field of View (Front) | 74 degree(s) | - | |
| Pixel Size (Front) | 1.12 μm | - | |
| Special Effects (Front) | HDR | HDR | |
| Camera Modes (Front) | Panoramic selfies, AI portrait mode, AI Beautify | Beauty mode, Filter mode | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9 has face detection. |
| Light Source (Front) | Display flash | - | |
| Video Resolutions (Front) | - | 1280 x 720 (720p) at 30 fps, 854 x 480 (480p) at 30 fps | |
| Camera Features (Front) | Palm shutter, AI silhouette detection | AI Selfie |
| BATTERY AND CHARGING | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| Battery Capacity (Battery Size) | 5020 mAh | 5000 mAh | Xiaomi Redmi Note 9 has larger battery capacity than Realme C31. |
|---|---|---|---|
| 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 Note 9 | Realme C31 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | - | Android 11 | |
| User Interface | - | Realme UI (R Edition) | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, A-GPS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| Data Transmission | VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1900 GSM, 2100 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 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 41 | Band 1, Band 3, 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, TDD 2500 | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | Wi-Fi | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 |
| MEDIA | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio) | - | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, XviD, M4V, MP4 | - | |
| Audio Amplifier | Smart PA | - |
| FEATURES | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, infrared (IR) sensor | Accelerometer, proximity sensor, magnetometer, gyro sensor, light sensor | |
| Security Devices | Face recognition, fingerprint reader | Fingerprint reader (side) | |
| Additional Phone Features | Infrared remote control, HyperEngine technology | MIMO technology, Ultra Power Saving Mode, Fast Charging |
| OTHERS | Xiaomi Redmi Note 9 | Realme C31 |
|---|
| Included Accessories | Protective cover, power adapter, SIM card removal tool, USB-C cable | SIM card removal tool, 10W charger, micro-USB cable | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Low Blue Light Certification | TUV Rheinland |
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