In depth comparison and review of Microsoft Surface Duo and OnePlus 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 | Microsoft Surface Duo | OnePlus 9 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Folder - dual screen | Touch | |
| Height | 145.2 mm | 160 mm | OnePlus 9 has greater height than Microsoft Surface Duo. |
| Width | 93.3 mm | 74.2 mm | Microsoft Surface Duo has greater width than OnePlus 9. |
| Depth | 9.9 mm | 8.7 mm | OnePlus 9 is narrower than Microsoft Surface Duo. |
| Weight | 250 g | 192 g | OnePlus 9 is lighter than Microsoft Surface Duo. |
| Dimensions Details | Unfolded - 186.9 mm x 4.8 mm x 145.2 mm | - | |
| Body Colour | Glacier | Astral black | Arctic sky | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.726 W/kg (head), 1.478 W/kg (body) | - | |
| Connector Type | USB Type-C - 24 pin USB-C | USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM, Electronic SIM card (e-SIM) | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Microsoft Surface Duo | OnePlus 9 |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | Fluid Amoled | |
| Foldable Display | Yes | - | |
| Display Design | Both directions folding | - | |
| Screen Size (Display Size) | 5.6" | 6.55" | OnePlus 9 has larger screen size than Microsoft Surface Duo. |
| Screen Resolution (Display Resolution) | 1800 x 1350 pixels | 2400 x 1080 pixels | OnePlus 9 has better screen resolution than Microsoft Surface Duo. |
| Display Format | - | Full HD+ | |
| Pixel Density | 401 ppi | 402 ppi | OnePlus 9 has better pixel density than Microsoft Surface Duo. |
| Aspect Ratio | 4:3 | 20:9 | |
| Max Brightness | - | 1100 cd/m² | |
| Colour Depth | - | 16.7 million colours | |
| HDR | - | Yes | OnePlus 9 has HDR. |
| HDR Technology | - | HDR10+ | |
| Display Enhancement Technology | - | Vibrant Color Effect | |
| Display Refresh Rate | - | 120 Hz | |
| Display Features | PixelSense Fusion Displays | Always-on display, Reading mode, night mode, Wide colour display (P3), sRGB support | |
| Display Protection (Screen Protector) | Corning Gorilla Glass (scratch resistant glass) | 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 | Microsoft Surface Duo | OnePlus 9 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 855 | Qualcomm Snapdragon 888 | |
|---|---|---|---|
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | - | Qualcomm ADRENO 660 |
| MEMORY | Microsoft Surface Duo | OnePlus 9 |
|---|
| RAM | 6 GB | LPDDR5 SDRAM - 8 GB | OnePlus 9 has more RAM than Microsoft Surface Duo. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 128 GB | Both phones have the same internal memory capacity. |
| Memory Interface | UFS 3.0 | UFS 3.1 |
| CAMERA | Microsoft Surface Duo | OnePlus 9 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 0 | 3 | |
|---|---|---|---|
| Sensor Resolution | - | 48 Megapixel | |
| Sensor Size | - | 1/1.43" | |
| Sensor Name | - | Sony Exmor RS IMX689 sensor | |
| Lens Aperture | - | F/1.8 | |
| Lens Construction | - | 7-element | |
| Pixel Size | - | 1.12 μm | |
| Focus Adjustment | - | Automatic | |
| Laser Auto Focus | - | Yes | |
| Minimum Focal Length (Focal Distance) | - | 23 mm | |
| Special Effects | - | HDR | |
| Camera Modes | - | Panorama, Time-lapse mode, Pro mode, HYPERLAPSE, Nightscape capture mode, Portrait, Filter mode, Super Macro, Portrait video, UltraShot HDR, Smart Scene Recognition, Tilt-shift mode, Focus Peaking, Cat/Dog Face Focus, Super Stable, Video Nightscape | |
| Light Source | - | Dual LED flash | |
| Video Resolutions | - | 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, Super slow motion video 1920 x 1080 (1080p) at 240 fps, Super slow motion video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 30fps | |
| Camera Features (Functions) | - | Tracking Focus, Phase Detect Auto-Focus (PDAF), Continuous Auto Focus (CAF), RAW image capture, Dual Native ISO, 2x2 On-Chip Lens (OCL), Hasselblad Camera, Natural Color Calibration, 12-bit RAW |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 50 Megapixel | |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/1.56" | |
| Sensor Name (2nd Camera) | - | Sony Exmor RS IMX766 sensor | |
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Lens Element Qty (2nd Camera) | - | 7-element | |
| Field of View (2nd Camera) | - | 119 degree(s) | |
| Minimum Focal Length (2nd Camera) | - | 14 mm | |
| Camera Features (2nd Camera) | - | 2x2 On-Chip Lens (OCL), Freeform Lens |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Lens Element Qty (3rd Camera) | - | 3-element | |
| Camera Functions (3rd Camera) | - | Monochrome |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 11 Megapixel | 16 Megapixel | OnePlus 9 has better front camera resolution than Microsoft Surface Duo. |
| Sensor Name (Front) | - | Sony Exmor RX IMX471 sensor | |
| Lens Aperture (Front) | F/2.0 | F/2.4 | Microsoft Surface Duo has better front lens aperture than Microsoft Surface Duo. |
| Field of View (Front) | 84 degree(s) | - | |
| Pixel Size (Front) | 1 μm | 1 μm | Both phones have the same front camera pixel size. |
| Focus Adjustment | - | Focus free | |
| Special Effects (Front) | HDR | HDR, face retouch | |
| Camera Modes (Front) | Burst mode, Panorama, low-light shots, Portrait mode with adjustable depth control | Time-lapse mode | |
| Light Source (Front) | High CRI LED flash | Display flash | |
| Video Resolutions (Front) | 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 | 1920 x 1080 (1080p) at 30 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 | Electronic Image Stabiliser (EIS) |
| BATTERY AND CHARGING | Microsoft Surface Duo | OnePlus 9 |
|---|
| Battery Capacity (Battery Size) | 3577 mAh | 4500 mAh | OnePlus 9 has larger battery capacity than Microsoft Surface Duo. |
|---|---|---|---|
| Fast Charging Technology | - | Qualcomm Quick Charge, Warp Charge 65T technology | OnePlus 9 has fast charging technology. |
| Recharge Time (Charging Time) | - | 29 min | |
| Wireless Charging | - | Yes | OnePlus 9 can be charged wirelessly. |
| Wireless Charging Standards | - | Qi | |
| Standby Time | 240 hours | - | |
| Talk Time | 1620 minutes | - | |
| Run Time Details | Standby: up to 240 hrs Talk: up to 1620 min Playback (local video): up to 15.5 hrs |
- |
| CELLULAR | Microsoft Surface Duo | OnePlus 9 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | OnePlus 9 has more advanced generation mobile network. |
| Operating System | Android 10 | OxygenOS (based on Android 11) | |
| Intelligent Assistant | Google Assistant | - | |
| Navigation | GPS, GLONASS, BeiDou, Galileo, QZSS | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Microsoft Surface Duo | OnePlus 9 |
|---|
| Data Transmission | GPRS, FDD-LTE, TDD-LTE, LAA | FDD-LTE, TDD-LTE, 5G NR FR1 | |
|---|---|---|---|
| 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 5, Band 8 | Band 1, Band 2, Band 4, Band 5, Band 8, Band 9, Band 19 | |
| 3G UMTS Frequency | 2100, 1900, 850, 900 | 2100, 1900, 1700, 850, 900, 1700, 800 | |
| 4G LTE Band | 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 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | |
| 4G LTE Frequency | 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 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | - | N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, n78, n40 | |
| 5G NR Frequency | - | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, TDD TD 3500, TDD 2300 | |
| Wireless Interface | IEEE 802.11ac | IEEE 802.11a/b/g/n/ac/ax | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.2 | |
| NFC | - | Yes | OnePlus 9 has NFC reader for mobile payments. |
| Modem | - | Snapdragon X55 5G |
| MEDIA | Microsoft Surface Duo | OnePlus 9 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTTTL, RTX, OTA, MID | WAV, WMA, AAC, MP3, FLAC, AC-3, AAC +, OGG, APE (Monkey's Audio), M4A, LDAC, IMY, EAC3, MID, AMR-WB, AMR-NB, EAC3-JOC, AC-4 | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4 | MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4 | |
| Sound Enhancements | Qualcomm aptX audio | Qualcomm aptX audio, Qualcomm aptX HD audio, Dolby Atmos Surround Sound |
| FEATURES | Microsoft Surface Duo | OnePlus 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 | Proximity sensor, hall sensor, dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, flicker sensor, sensor core | |
| Security Devices | Fingerprint reader (side) | Fingerprint reader (under display), face recognition | |
| Additional Phone Features | MIMO technology, Fast Charging, dual microphones with noise suppression and echo cancellation, Full Duplex communication, 360° hinge, stylus support, two apps side-by-side | Noise Cancellation Technology, MIMO technology, Gesture Controls, OnePlus Switch, Alert Slider, dual stereo speakers, Zen mode 2.0, OnePlus Games |
| OTHERS | Microsoft Surface Duo | OnePlus 9 |
|---|
| Included Accessories | SIM card removal tool, USB-C headphones, 18W charger, Surface Duo Bumper (Glacier) | SIM card removal tool, sticker, screen protector, USB-C to USB-C cable, protective case, Warp Charge 65 power adapter | |
|---|---|---|---|
| Compliant Standards | - | SGS |
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