In depth comparison and review of OPPO A9 2020 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 | OPPO A9 2020 | Realme C31 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH1941 | RMX3501 | |
| Form Factor | Touch | Touch | |
| Height | 163.6 mm | 164.7 mm | Realme C31 has greater height than OPPO A9 2020. |
| Width | 75.6 mm | 76.1 mm | Realme C31 has greater width than OPPO A9 2020. |
| Depth | 9.1 mm | 8.4 mm | Realme C31 is narrower than OPPO A9 2020. |
| Weight | 195 g | 197 g | OPPO A9 2020 is lighter than OPPO A9 2020. |
| Body Colour | Marine green | Space purple | Light silver | Dark green | |
| Body Material | 3D glass | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.976 W/kg (body), 0.847 W/kg (head), 2.118 W/kg (limb) | 1.147 W/kg (body), 0.957 W/kg (head), 2.663 W/kg (limb) | |
| Connector Type | USB Type-C - 24 pin USB-C Handset 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 |
| DISPLAY | OPPO A9 2020 | Realme C31 |
|---|
| Display Type | LCD display | - | |
|---|---|---|---|
| Display Technology | TFT | - | |
| Screen Size (Display Size) | 6.5" | 6.5" | Both phones have the same screen size. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 1600 x 720 pixels | Both phones have the same screen resolution. |
| Display Format | - | HD+ | |
| Pixel Density | 269 ppi | - | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | 480 cd/m² | - | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Contrast Ratio | 1500:1 | - | |
| Display Enhancement Technology | Blue light filter | - | |
| Display Refresh Rate | - | 60 Hz | |
| Touch Sampling Rate | - | 120 Hz | |
| Display Features | In-Cell Display Technology, Sunlight screen | Ultra-clear View |
| PROCESSOR | OPPO A9 2020 | Realme C31 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 665 | Unisoc | |
|---|---|---|---|
| Processor Number | - | T612 | |
| Clock Speed | - | 1.82 GHz | |
| Processor Core Qty | - | 8-core | |
| Graphics System (GPU) | Qualcomm ADRENO 610 | ARM Mali-G57 |
| MEMORY | OPPO A9 2020 | Realme C31 |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | LPDDR4X SDRAM - 4 GB + up to 7 GB virtual extension | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 64 GB | OPPO A9 2020 has more internal memory than Realme C31. |
| Memory Interface | UFS 2.1 | UFS 2.2 | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | microSDHC, microSD, microSDXC - up to 1 TB |
| CAMERA | OPPO A9 2020 | Realme C31 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 13 Megapixel | OPPO A9 2020 has better camera resolution than Realme C31. |
| Sensor Size | 1/2.25" | - | |
| Sensor Type | CMOS | - | |
| Lens Aperture | F/1.8 | F/2.2 | OPPO A9 2020 has better lens aperture than OPPO A9 2020. |
| Lens Construction | - | 5-element | |
| Pixel Size | 0.8 μm | - | |
| Focus Adjustment | Automatic | Automatic | |
| Special Effects | - | HDR | |
| Camera Modes | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Portrait, Night, Ultra Night Mode 2.0 | Burst mode, Panorama, Time-lapse mode, Pro mode, Portrait, Filter mode, Macro mode, Night Pro | |
| Light Source | LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 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) | Electronic Image Stabiliser (EIS) | AI Triple camera |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 2 Megapixel | OPPO A9 2020 has better second camera resolution than Realme C31. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/4.0" | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.25 | F/2.4 | OPPO A9 2020 has better second camera lens aperture than OPPO A9 2020. |
| Field of View (2nd Camera) | 119 degree(s) | - | |
| Pixel Size (2nd Camera) | 1.12 μm | - | |
| Camera Functions (2nd Camera) | - | Macro camera | |
| Camera Features (2nd Camera) | - | 4cm macro photography |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 0.3 Megapixel | OPPO A9 2020 has higher resolution third camera than Realme C31. |
|---|---|---|---|
| Sensor Size (3rd Camera) | 1/5" | - | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.8 | OPPO A9 2020 has better third camera lens aperture than OPPO A9 2020. |
| Pixel Size (3rd Camera) | 1.75 μm | - | |
| Camera Functions (3rd Camera) | - | B&W lens |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 2 Megapixel | - | |
|---|---|---|---|
| Sensor Size (4th Camera) | 1/5" | - | |
| Lens Aperture (4th Camera) | F/2.4 | - | |
| Pixel Size (4th Camera) | 1.75 μm | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 16 Megapixel | 5 Megapixel | OPPO A9 2020 has better front camera resolution than Realme C31. |
| Sensor Size (Front) | 1/3.1" | - | |
| Lens Aperture (Front) | F/2.0 | F/2.2 | OPPO A9 2020 has better front lens aperture than OPPO A9 2020. |
| Lens Element Qty (Front) | - | 3-element | |
| Pixel Size (Front) | 1 μm | - | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | AI Beauty | Beauty mode, Filter mode | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | 1280 x 720 (720p) at 30 fps, 854 x 480 (480p) at 30 fps | |
| Camera Features (Front) | - | AI Selfie |
| BATTERY AND CHARGING | OPPO A9 2020 | Realme C31 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 5000 mAh | Both phones have the same battery capacity. |
|---|---|---|---|
| Standby Time | 450 hours | - | |
| Talk Time | 2700 minutes | - | |
| Run Time Details | Standby: up to 450 hrs Talk: up to 2700 min |
- |
| CELLULAR | OPPO A9 2020 | Realme C31 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | ColorOS 6.0.1 (based on Android 9) | Android 11 | |
| User Interface | - | Realme UI (R Edition) | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, A-GPS, BeiDou, Galileo |
| COMMUNICATIONS | OPPO A9 2020 | Realme C31 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 6, Band 8, Band 19 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 800, 900, 800 | 2100, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 18, Band 19, Band 20, Band 26, Band 28, Band 38, Band 39, 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 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 1900, 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 | |
| NFC | Yes | - | OPPO A9 2020 has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | OPPO A9 2020 | Realme C31 |
|---|
| Sound Enhancements | Dolby Atmos sound technology, Hi-Res audio | - |
|---|
| FEATURES | OPPO A9 2020 | Realme C31 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, gyro sensor, geomagnetic sensor | Accelerometer, proximity sensor, magnetometer, gyro sensor, light sensor | |
| Security Devices | Face recognition | Fingerprint reader (side) | |
| Additional Phone Features | Multitasking, Game Boost 2.0 | MIMO technology, Ultra Power Saving Mode, Fast Charging |
| OTHERS | OPPO A9 2020 | Realme C31 |
|---|
| Included Accessories | Headphones, power adapter, SIM card removal tool, cover, USB-C cable, screen protector (pre-applied) | SIM card removal tool, 10W charger, micro-USB cable | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland |
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