In depth comparison and review of Microsoft Surface Duo and Xiaomi Redmi Note 9T. 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 | Xiaomi Redmi Note 9T |
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Product Type | Smartphone | Smartphone | |
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Form Factor | Folder - dual screen | Touch | |
Height | 145.2 mm | 161.9 mm | Xiaomi Redmi Note 9T has greater height than Microsoft Surface Duo. |
Width | 93.3 mm | 77.3 mm | Microsoft Surface Duo has greater width than Xiaomi Redmi Note 9T. |
Depth | 9.9 mm | 9.05 mm | Xiaomi Redmi Note 9T is narrower than Microsoft Surface Duo. |
Weight | 250 g | 199 g | Xiaomi Redmi Note 9T is lighter than Microsoft Surface Duo. |
Dimensions Details | Unfolded - 186.9 mm x 4.8 mm x 145.2 mm | - | |
Body Colour | Glacier | Daybreak purple | |
Protection | - | Splashproof | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 0.726 W/kg (head), 1.478 W/kg (body) | 0.937 W/kg (body), 0.592 W/kg (head), 1.981 W/kg (limb) | |
Connector Type | 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 | Xiaomi Redmi Note 9T |
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Display Type | OLED display | - | |
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Display Technology | AMOLED | - | |
Foldable Display | Yes | - | |
Display Design | Both directions folding | - | |
Screen Size (Display Size) | 5.6" | 6.53" | Xiaomi Redmi Note 9T has larger screen size than Microsoft Surface Duo. |
Screen Resolution (Display Resolution) | 1800 x 1350 pixels | 2340 x 1080 pixels | Xiaomi Redmi Note 9T has better screen resolution than Microsoft Surface Duo. |
Display Format | - | Full HD+ | |
Pixel Density | 401 ppi | 395 ppi | Microsoft Surface Duo has better pixel density than Xiaomi Redmi Note 9T. |
Aspect Ratio | 4:3 | 19.5:9 | |
Max Brightness | - | 450 cd/m² | |
Contrast Ratio | - | 1500:1 | |
Display Features | PixelSense Fusion Displays | Reading mode, night mode, Dot Display | |
Display Protection (Screen Protector) | Corning Gorilla Glass (scratch resistant glass) | Corning Gorilla Glass 5 (scratch resistant glass) |
SECOND DISPLAY |
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Second Display Type | OLED display - colour | - | |
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Second Display Screen Size | 5.6" | - | |
Second Display Resolution | 1800 x 1350 pixels | - |
UNFOLDED DISPLAY |
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Unfolded Display Screen Size | 8.1 in | - | |
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Unfolded Display Resolution | 2700 x 1800 pixels | - |
PROCESSOR | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Processor Type (CPU) | Qualcomm Snapdragon 855 | MediaTek Dimensity 800U | |
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Clock Speed | - | 2.3 GHz | |
Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
Graphics System (GPU) | - | Mali-G57 |
MEMORY | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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RAM | 6 GB | LPDDR4X SDRAM - 4 GB | Microsoft Surface Duo has more RAM than Xiaomi Redmi Note 9T. |
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Internal Memory Size (Storage Capacity) | 128 GB | 64 GB | Microsoft Surface Duo has more internal memory than Xiaomi Redmi Note 9T. |
Memory Interface | UFS 3.0 | UFS 2.2 | |
Supported Flash Memory Cards (Expandable Memory) | - | microSD |
CAMERA | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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MAIN CAMERA |
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Number of Main Cameras | 0 | 3 | |
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Sensor Resolution | - | 48 Megapixel | |
Sensor Size | - | 1/2" | |
Lens Aperture | - | F/1.79 | |
Pixel Size | - | 0.8 μm | |
Focus Adjustment | - | Automatic | |
Light Source | - | Flash | |
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 1280 x 720 (720p) at 960 fps | |
Camera Features (Functions) | - | 4-in-1 Super Pixel |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | - | 2 Megapixel | |
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Lens Aperture (2nd Camera) | - | F/2.4 | |
Pixel Size (2nd Camera) | - | 1.75 μm | |
Camera Functions (2nd Camera) | - | Macro camera |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
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Lens Aperture (3rd Camera) | - | F/2.4 | |
Pixel Size (3rd Camera) | - | 1.75 μm | |
Camera Functions (3rd Camera) | - | Depth camera |
FRONT CAMERA |
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Number of Front Cameras | 1 | 1 | |
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Sensor Resolution (Front) | 11 Megapixel | 13 Megapixel | Xiaomi Redmi Note 9T has better front camera resolution than Microsoft Surface Duo. |
Lens Aperture (Front) | F/2.0 | F/2.25 | Microsoft Surface Duo has better front lens aperture than Microsoft Surface Duo. |
Field of View (Front) | 84 degree(s) | - | |
Pixel Size (Front) | 1 μm | - | |
Special Effects (Front) | HDR | - | |
Camera Modes (Front) | Burst mode, Panorama, low-light shots, Portrait mode with adjustable depth control | - | |
Face Recognition (Face ID) | - | Face recognition | Xiaomi Redmi Note 9T has face detection. |
Light Source (Front) | High CRI LED 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, 1280 x 720 (720p) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 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 | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Battery Capacity (Battery Size) | 3577 mAh | 5000 mAh | Xiaomi Redmi Note 9T has larger battery capacity than Microsoft Surface Duo. |
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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 |
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CELLULAR | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | 5G | Xiaomi Redmi Note 9T has more advanced generation mobile network. |
Operating System | Android 10 | Android 10 | |
User Interface | - | MIUI 12 | |
Intelligent Assistant | Google Assistant | - | |
Navigation | GPS, GLONASS, BeiDou, Galileo, QZSS | GPS, GLONASS, Galileo |
COMMUNICATIONS | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Data Transmission | GPRS, FDD-LTE, TDD-LTE, LAA | FDD-LTE, TDD-LTE, 5G NR FR1 | |
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2G Band | 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 | |
3G UMTS Frequency | 2100, 1900, 850, 900 | 2100, 1900, 1700, 850, 900 | |
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 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 32, Band 38, Band 40, Band 41, Band 42 | |
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 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 2300, TDD 2500, TDD 3500 | |
5G NR Band | - | N1, n3, n5, n7, n8, n20, n28, n38, n41, n77, n78, n79 | |
5G NR Frequency | - | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, TDD TD 3700, TDD TD 3500, TDD TD 4500 | |
Wireless Interface | IEEE 802.11ac | IEEE 802.11a/b/g/n/ac | |
Bluetooth | Bluetooth 5.0 | Bluetooth 5.1 | |
NFC | - | Yes | Xiaomi Redmi Note 9T has NFC reader for mobile payments. |
MEDIA | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTTTL, RTX, OTA, MID | AAC, LDAC, LHDC | |
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Supported Digital Video Standards | MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4 | - | |
Sound Enhancements | Qualcomm aptX audio | - |
FEATURES | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
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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, infrared (IR) sensor | |
Security Devices | Fingerprint reader (side) | Face recognition, fingerprint reader (side) | |
Security Technology | - | AI face unlock | |
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 | Infrared remote control, linear motor, WriteBooster technology, Host Performance Booster (HPB) technology |
OTHERS | Microsoft Surface Duo | Xiaomi Redmi Note 9T |
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Included Accessories | SIM card removal tool, USB-C headphones, 18W charger, Surface Duo Bumper (Glacier) | Protective cover, power adapter, SIM card removal tool, USB-C cable | |
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Compliant Standards | - | TUV Rheinland Low Blue Light Certification |