In depth comparison and review of Xiaomi MI 9T 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 | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Folder - dual screen | |
| Height | 156.7 mm | 145.2 mm | Xiaomi MI 9T has greater height than Microsoft Surface Duo. |
| Width | 74.3 mm | 93.3 mm | Microsoft Surface Duo has greater width than Xiaomi MI 9T. |
| Depth | 8.8 mm | 9.9 mm | Xiaomi MI 9T is narrower than Xiaomi MI 9T. |
| Weight | 191 g | 250 g | Xiaomi MI 9T is lighter than Xiaomi MI 9T. |
| Dimensions Details | - | Unfolded - 186.9 mm x 4.8 mm x 145.2 mm | |
| Body Colour | Carbon black | Glacier blue | Glacier | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.511 W/kg (body), 1.341 W/kg (head) | 0.726 W/kg (head), 1.478 W/kg (body) | |
| Connector Type | USB Type-C - 24 pin USB-C Headset 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 | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | AMOLED | |
| Foldable Display | - | Yes | |
| Display Design | - | Both directions folding | |
| Screen Size (Display Size) | 6.39" | 5.6" | Xiaomi MI 9T has larger screen size than Microsoft Surface Duo. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1800 x 1350 pixels | Xiaomi MI 9T has better screen resolution than Microsoft Surface Duo. |
| Display Format | Full HD+ | - | |
| Pixel Density | 403 ppi | 401 ppi | Xiaomi MI 9T has better pixel density than Microsoft Surface Duo. |
| Aspect Ratio | 19.5:9 | 4:3 | |
| Max Brightness | 600 cd/m² | - | |
| Contrast Ratio | 60000:1 | - | |
| HDR | Yes | - | Xiaomi MI 9T has HDR. |
| HDR Technology | HDR10 | - | |
| Display Enhancement Technology | Sunshine mode 2.0 | - | |
| Display Features | Reading mode, Colour temperature adjustment, night mode, 256 ranks adjustable Reading mode, Dark mode, Multi-colour Always-on display, Dynamic display | PixelSense Fusion Displays | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (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 | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 730 | Qualcomm Snapdragon 855 | |
|---|---|---|---|
| Clock Speed | 2.2 GHz | - | |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi MI 9T has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 618 | - |
| MEMORY | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| RAM | 6 GB | 6 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | Microsoft Surface Duo has more internal memory than Xiaomi MI 9T. |
| Memory Interface | - | UFS 3.0 |
| CAMERA | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 0 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | - | |
| Sensor Size | 1/2" | - | |
| Sensor Name | Sony Exmor RS IMX582 sensor | - | |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/1.75 | - | |
| Pixel Size | 1.6 μm | - | |
| Focus Adjustment | Automatic | - | |
| Laser Auto Focus | Yes | - | |
| Optical Zoom | 2x | - | |
| Digital Zoom | 10x | - | |
| Special Effects | HDR | - | |
| Camera Modes | Burst mode, Panorama, Pro mode, AI Beautify, Smart ultra-wide angle mode, Photo timer, Custom watermark, Full body portrait mode, Baby Beautify, AI smart slimming | - | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi MI 9T has face detection. |
| Light Source | Flash | - | |
| Still Image Resolutions | 8000 x 6000 | - | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1920 x 1080 (1080p) at 960 fps, Slo-mo video 1280 x 720 (720p) at 960 fps | - | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), Continuous Auto Focus (CAF), video stabilisation, 4-in-1 Super Pixel, AI scene detection, AI studio lighting, Video Beautify, AI Triple camera, 960 fps Smart audio pairing, AI lens flare, AI high resolution photos, Portrait mode background blur adjustment, Ultra wide-angle edge distortion correction, Group photo face correction, Portrait mode background blurring, Motion tracking | - |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | - | |
|---|---|---|---|
| Lens Type (2nd Camera) | Telephoto lens | - | |
| Lens Aperture (2nd Camera) | F/2.4 | - | |
| Pixel Size (2nd Camera) | 1.12 μm | - | |
| Optical Zoom | 2x | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 13 Megapixel | - | |
|---|---|---|---|
| Lens Type (3rd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (3rd Camera) | F/2.4 | - | |
| Field of View (3rd Camera) | 124.8 degree(s) | - | |
| Pixel Size (3rd Camera) | 1.12 μm | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Front Camera Design | Pop-up | - | |
| Sensor Resolution (Front) | 20 Megapixel | 11 Megapixel | Xiaomi MI 9T has better front camera resolution than Microsoft Surface Duo. |
| Lens Aperture (Front) | F/2.2 | F/2.0 | Microsoft Surface Duo has better front lens aperture than Xiaomi MI 9T. |
| Field of View (Front) | - | 84 degree(s) | |
| Pixel Size (Front) | 0.8 μm | 1 μm | Microsoft Surface Duo has larger front camera pixel size than Xiaomi MI 9T. |
| Special Effects (Front) | HDR, Magic mirror | HDR | |
| Camera Modes (Front) | Selfie panorama, AI portrait mode, AI Beautify, AI makeup | Burst mode, Panorama, low-light shots, Portrait mode with adjustable depth control | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi MI 9T has face detection. |
| 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) | Self-timer, age recognition, AI scene detection, AI studio lighting, Eye light, AI feature adjustment, sapphire crystal lens cover, ambient bulb, Palm shutter, AI silhouette detection, wide-angle distortion correction, camera display brightness correction | 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 | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Battery Capacity (Battery Size) | 4000 mAh | 3577 mAh | Xiaomi MI 9T has larger battery capacity than Microsoft Surface Duo. |
|---|---|---|---|
| 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 | Xiaomi MI 9T | 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 | Android 9.0 Pie | Android 10 | |
| User Interface | MIUI 10 | - | |
| Intelligent Assistant | - | Google Assistant | |
| Payment Technology | Google Pay | - | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, 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 8 | Band 1, Band 2, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 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 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 DD, FDD 700 APT, TDD 2600, TDD 2300 | 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 | - | Xiaomi MI 9T has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio), apt-X, LDAC, apt-X HD | WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTTTL, RTX, OTA, MID | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, VC-1, XviD, MPEG-4, H.264, M4V, VP8, VP9 | MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4 | |
| Sound Enhancements | Hi-Fi Sound support, Hi-Res audio, Qualcomm TrueWireless Stereo Plus | Qualcomm aptX audio |
| FEATURES | Xiaomi MI 9T | 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, digital compass, gyro sensor, distance sensor, In-screen ambient light sensor | Proximity sensor, hall sensor, dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor | |
| Security Devices | Fingerprint reader (under display) | Fingerprint reader (side) | |
| Additional Phone Features | HD Voice, Dual microphones, MU-MIMO technology, Fast Charging, MI Turbo, GAME Turbo 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 | Xiaomi MI 9T | Microsoft Surface Duo |
|---|
| Included Accessories | Protective cover, power adapter, SIM card removal tool, USB-C cable | SIM card removal tool, USB-C headphones, 18W charger, Surface Duo Bumper (Glacier) | |
|---|---|---|---|
| Compliant Standards | VDE | - |
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