In depth comparison and review of OPPO A9 2020 and Microsoft Surface Duo. 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 | Microsoft Surface Duo |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH1941 | - | |
| Form Factor | Touch | Folder - dual screen | |
| Height | 163.6 mm | 145.2 mm | OPPO A9 2020 has greater height than Microsoft Surface Duo. |
| Width | 75.6 mm | 93.3 mm | Microsoft Surface Duo has greater width than OPPO A9 2020. |
| Depth | 9.1 mm | 9.9 mm | OPPO A9 2020 is narrower than OPPO A9 2020. |
| Weight | 195 g | 250 g | OPPO A9 2020 is lighter than OPPO A9 2020. |
| Dimensions Details | - | Unfolded - 186.9 mm x 4.8 mm x 145.2 mm | |
| Body Colour | Marine green | Space purple | Glacier | |
| Body Material | 3D glass | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.976 W/kg (body), 0.847 W/kg (head), 2.118 W/kg (limb) | 0.726 W/kg (head), 1.478 W/kg (body) | |
| Connector Type | USB Type-C - 24 pin USB-C Handset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM, Electronic SIM card (e-SIM) | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | TFT | AMOLED | |
| Foldable Display | - | Yes | |
| Display Design | - | Both directions folding | |
| Screen Size (Display Size) | 6.5" | 5.6" | OPPO A9 2020 has larger screen size than Microsoft Surface Duo. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 1800 x 1350 pixels | Microsoft Surface Duo has better screen resolution than OPPO A9 2020. |
| Pixel Density | 269 ppi | 401 ppi | Microsoft Surface Duo has better pixel density than OPPO A9 2020. |
| Aspect Ratio | - | 4:3 | |
| Max Brightness | 480 cd/m² | - | |
| Colour Depth | 16.7 million colours | - | |
| Contrast Ratio | 1500:1 | - | |
| Display Enhancement Technology | Blue light filter | - | |
| Display Features | In-Cell Display Technology, Sunlight screen | PixelSense Fusion Displays | |
| Display Protection (Screen Protector) | - | Corning Gorilla Glass (scratch resistant glass) |
| SECOND DISPLAY |
|---|
| Second Display Type | - | OLED display - colour | |
|---|---|---|---|
| Second Display Screen Size | - | 5.6" | |
| Second Display Resolution | - | 1800 x 1350 pixels |
| UNFOLDED DISPLAY |
|---|
| Unfolded Display Screen Size | - | 8.1 in | |
|---|---|---|---|
| Unfolded Display Resolution | - | 2700 x 1800 pixels |
| PROCESSOR | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 665 | Qualcomm Snapdragon 855 | |
|---|---|---|---|
| Processor Core Qty | - | 8-core | |
| Graphics System (GPU) | Qualcomm ADRENO 610 | - |
| MEMORY | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | 6 GB | Microsoft Surface Duo has more RAM than OPPO A9 2020. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 128 GB | Both phones have the same internal memory capacity. |
| Memory Interface | UFS 2.1 | UFS 3.0 | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | - |
| CAMERA | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 0 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | - | |
| Sensor Size | 1/2.25" | - | |
| Sensor Type | CMOS | - | |
| Lens Aperture | F/1.8 | - | |
| Pixel Size | 0.8 μm | - | |
| Focus Adjustment | Automatic | - | |
| Camera Modes | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Portrait, Night, Ultra Night Mode 2.0 | - | |
| Light Source | 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 | - | |
| Camera Features (Functions) | Electronic Image Stabiliser (EIS) | - |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | - | |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/4.0" | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.25 | - | |
| Field of View (2nd Camera) | 119 degree(s) | - | |
| Pixel Size (2nd Camera) | 1.12 μm | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | - | |
|---|---|---|---|
| Sensor Size (3rd Camera) | 1/5" | - | |
| Lens Aperture (3rd Camera) | F/2.4 | - | |
| Pixel Size (3rd Camera) | 1.75 μm | - |
| 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 | 11 Megapixel | OPPO A9 2020 has better front camera resolution than Microsoft Surface Duo. |
| Sensor Size (Front) | 1/3.1" | - | |
| Lens Aperture (Front) | F/2.0 | F/2.0 | Both phones have the same front camera lens aperture. |
| Field of View (Front) | - | 84 degree(s) | |
| Pixel Size (Front) | 1 μm | 1 μm | Both phones have the same front camera pixel size. |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | AI Beauty | Burst mode, Panorama, low-light shots, Portrait mode with adjustable depth control | |
| Light Source (Front) | - | High CRI LED flash | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps | |
| Camera Features (Front) | - | Phase Detect Auto-Focus (PDAF), FOV optimised with AI (for front and rear), dynamic range scene detection, Super-resolution zoom, super zoom up to 7x, gyro-based digital video stabilisation |
| BATTERY AND CHARGING | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 3577 mAh | OPPO A9 2020 has larger battery capacity than Microsoft Surface Duo. |
|---|---|---|---|
| Standby Time | 450 hours | 240 hours | OPPO A9 2020 has longer standby time than Microsoft Surface Duo. |
| Talk Time | 2700 minutes | 1620 minutes | OPPO A9 2020 has longer battery life when making calls than Microsoft Surface Duo. |
| Run Time Details | Standby: up to 450 hrs Talk: up to 2700 min |
Standby: up to 240 hrs Talk: up to 1620 min Playback (local video): up to 15.5 hrs |
| CELLULAR | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| 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 10 | |
| Intelligent Assistant | - | Google Assistant | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | GPRS, FDD-LTE, TDD-LTE, LAA | |
|---|---|---|---|
| 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 2, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 800, 900, 800 | 2100, 1900, 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 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 14, Band 19, Band 20, Band 25, Band 26, Band 28, Band 29, Band 30, Band 38, Band 39, Band 40, Band 41, Band 46, Band 66 | |
| 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 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700 PS, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 700d, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 5150, FDD 1700 - 2110 AWS-3 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11ac | |
| 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 | Microsoft Surface Duo |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTTTL, RTX, OTA, MID | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4 | |
| Sound Enhancements | Dolby Atmos sound technology, Hi-Res audio | Qualcomm aptX audio |
| FEATURES | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| 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, geomagnetic sensor | Proximity sensor, hall sensor, dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor | |
| Security Devices | Face recognition | Fingerprint reader (side) | |
| Additional Phone Features | Multitasking, Game Boost 2.0 | MIMO technology, Fast Charging, dual microphones with noise suppression and echo cancellation, Full Duplex communication, 360° hinge, stylus support, two apps side-by-side |
| OTHERS | OPPO A9 2020 | Microsoft Surface Duo |
|---|
| Included Accessories | Headphones, power adapter, SIM card removal tool, cover, USB-C cable, screen protector (pre-applied) | SIM card removal tool, USB-C headphones, 18W charger, Surface Duo Bumper (Glacier) |
|---|
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