In depth comparison and review of Xiaomi Redmi Note 9T and Microsoft Surface Duo 2. 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 Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Folder - dual screen | |
| Height | 161.9 mm | 145.2 mm | Xiaomi Redmi Note 9T has greater height than Microsoft Surface Duo 2. |
| Width | 77.3 mm | 92.1 mm | Microsoft Surface Duo 2 has greater width than Xiaomi Redmi Note 9T. |
| Depth | 9.05 mm | 11 mm | Xiaomi Redmi Note 9T is narrower than Xiaomi Redmi Note 9T. |
| Weight | 199 g | 284 g | Xiaomi Redmi Note 9T is lighter than Xiaomi Redmi Note 9T. |
| Dimensions Details | - | Unfolded - 184.5 mm x 5.5 mm x 145.2 mm | |
| Body Colour | Daybreak purple | Glacier | Obsidian | |
| Body Material | - | Corning Gorilla Glass | |
| Protection | Splashproof | - | |
| Waterproof (Water-resistant) | - | - | |
| Repairability Index | - | 3.9 (out of 10) | |
| SAR Value | 0.937 W/kg (body), 0.592 W/kg (head), 1.981 W/kg (limb) | 0.726 W/kg (head), 1.478 W/kg (body) | |
| Connector Type | - | 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 Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Display Type | - | OLED display | |
|---|---|---|---|
| Display Technology | - | AMOLED | |
| Foldable Display | - | Yes | |
| Display Design | - | Both directions folding | |
| Screen Size (Display Size) | 6.53" | 5.8" | Xiaomi Redmi Note 9T has larger screen size than Microsoft Surface Duo 2. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1344 x 1892 pixels | Microsoft Surface Duo 2 has better screen resolution than Xiaomi Redmi Note 9T. |
| Display Format | Full HD+ | - | |
| Pixel Density | 395 ppi | 401 ppi | Microsoft Surface Duo 2 has better pixel density than Xiaomi Redmi Note 9T. |
| Aspect Ratio | 19.5:9 | 13:9 | |
| Max Brightness | 450 cd/m² | 800 cd/m² | Microsoft Surface Duo 2 has better display brightness than Xiaomi Redmi Note 9T. |
| Contrast Ratio | 1500:1 | - | |
| HDR | - | Yes | Microsoft Surface Duo 2 has HDR. |
| Display Refresh Rate | - | 90 Hz | |
| Display Features | Reading mode, night mode, Dot Display | DCI-P3 Wide colour gamut, 100% sRGB, Dual PixelSense Fusion Displays | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | Corning Gorilla Glass Victus (scratch resistant glass) |
| SECOND DISPLAY |
|---|
| Second Display Type | - | OLED display - colour | |
|---|---|---|---|
| Second Display Screen Size | - | 5.8" | |
| Second Display Resolution | - | 1344 x 1892 pixels |
| UNFOLDED DISPLAY |
|---|
| Unfolded Display Screen Size | - | 8.3 in | |
|---|---|---|---|
| Unfolded Display Resolution | - | 2688 x 1892 pixels |
| PROCESSOR | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Processor Type (CPU) | MediaTek Dimensity 800U | Qualcomm Snapdragon 888 5G | |
|---|---|---|---|
| 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 | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | LPDDR5 SDRAM - 8 GB | Microsoft Surface Duo 2 has more RAM than Xiaomi Redmi Note 9T. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | Microsoft Surface Duo 2 has more internal memory than Xiaomi Redmi Note 9T. |
| Memory Interface | UFS 2.2 | - | |
| Supported Flash Memory Cards (Expandable Memory) | microSD | - |
| CAMERA | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 12 Megapixel | Xiaomi Redmi Note 9T has better camera resolution than Microsoft Surface Duo 2. |
| Sensor Size | 1/2" | - | |
| Lens Aperture | F/1.79 | F/1.7 | Microsoft Surface Duo 2 has better lens aperture than Xiaomi Redmi Note 9T. |
| Pixel Size | 0.8 μm | 1.4 μm | Microsoft Surface Duo 2 has larger camera pixel size than Xiaomi Redmi Note 9T. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Microsoft Surface Duo 2 has optical stabilisation. |
| Focus Adjustment | Automatic | - | |
| Digital Zoom | - | 10x | |
| Special Effects | - | HDR | |
| Camera Modes | - | Night mode, Auto mode, low-light shots, Panorama mode with wide dynamic range, slow motion video at 120 or 240fps | |
| Light Source | Flash | Dual LED 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 | 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 (Functions) | 4-in-1 Super Pixel | Dual Pixel Phase Detect Auto-Focus (PDAF), Smooth Zoom, HEVC (High Efficiency Video coding), HDR video recording, multi-frame photo capture, dynamic range scene detection |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 2 Megapixel | 12 Megapixel | Microsoft Surface Duo 2 has better second camera resolution than Xiaomi Redmi Note 9T. |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Telephoto lens | |
| Lens Aperture (2nd Camera) | F/2.4 | F/2.4 | Both phones have the same second camera lens aperture. |
| Pixel Size (2nd Camera) | 1.75 μm | 1 μm | Xiaomi Redmi Note 9T has larger second camera pixel size than Microsoft Surface Duo 2. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Microsoft Surface Duo 2 has optical stabilisation of the second camera. |
| Optical Zoom | - | 2x | |
| Camera Functions (2nd Camera) | Macro camera | - | |
| Camera Features (2nd Camera) | - | Phase Detect Auto-Focus (PDAF) |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 16 Megapixel | Microsoft Surface Duo 2 has higher resolution third camera than Xiaomi Redmi Note 9T. |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.2 | Microsoft Surface Duo 2 has better third camera lens aperture than Xiaomi Redmi Note 9T. |
| Field of View (3rd Camera) | - | 110 degree(s) | |
| Pixel Size (3rd Camera) | 1.75 μm | 1 μm | Xiaomi Redmi Note 9T has larger third camera pixel size than Microsoft Surface Duo 2. |
| Camera Functions (3rd Camera) | Depth camera | - | |
| Camera Features (3rd Camera) | - | Field of view, distortion correction |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 13 Megapixel | 12 Megapixel | Xiaomi Redmi Note 9T has better front camera resolution than Microsoft Surface Duo 2. |
| Lens Aperture (Front) | F/2.25 | F/2.0 | Microsoft Surface Duo 2 has better front lens aperture than Xiaomi Redmi Note 9T. |
| Pixel Size (Front) | - | 1 μm | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9T has face detection. |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps | - |
| BATTERY AND CHARGING | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 4449 mAh | Xiaomi Redmi Note 9T has larger battery capacity than Microsoft Surface Duo 2. |
|---|---|---|---|
| Talk Time | - | 1680 minutes | |
| Run Time Details | - | Talk: up to 1680 min Playback (local video): up to 15.5 hrs |
| CELLULAR | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 5G | Both phones have the same mobile network generation. |
| Operating System | Android 10 | Android 11 | |
| User Interface | MIUI 12 | - | |
| Intelligent Assistant | - | Google Assistant | |
| Navigation | GPS, GLONASS, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Data Transmission | FDD-LTE, TDD-LTE, 5G NR FR1 | GPRS, FDD-LTE, TDD-LTE, Gigabit LTE, LAA, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | - | 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 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 32, Band 38, Band 40, Band 41, Band 42 | 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 42, Band 46, Band 48, Band 66, Band 71 | |
| 4G LTE Frequency | 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 | 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 3500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600 | |
| 5G NR Band | N1, n3, n5, n7, n8, n20, n28, n38, n41, n77, n78, n79 | N1, n2, n3, n5, n7, n20, n28, n38, n41, n66, n71, n77, n78, n79, n25 | |
| 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 | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, FDD 600, TDD TD 3700, TDD TD 3500, TDD TD 4500, FDD 1900 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11ax | |
| Bluetooth | Bluetooth 5.1 | Bluetooth 5.1 | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| MEDIA | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Supported Digital Audio Standards | AAC, LDAC, LHDC | WAV, AAC, AMR, MP3, FLAC, OGG, MIDI, M4A, apt-X, IMY, RTX, OTA, MID, TWS, RTTL | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, FLV, AVI, MOV, MPEG-4, WMV, ASF, 3GP, H.264, TS, M2TS, WebM, HEVC, 3G2, HEIF, H.265 HEVC, HEIC | |
| Sound Enhancements | - | Qualcomm aptX HD audio, Qualcomm aptX Classic |
| FEATURES | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Phone Functions | - | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, infrared (IR) sensor | Hall sensor, Time of Flight (ToF), dual accelerometers, dual gyroscope, dual magnetometer, dual ambient light sensor, dual proximity sensor | |
| Security Devices | Face recognition, fingerprint reader (side) | Fingerprint reader (side) | |
| Security Technology | AI face unlock | - | |
| Additional Phone Features | Infrared remote control, linear motor, WriteBooster technology, Host Performance Booster (HPB) technology | MIMO technology, Fast Charging, dual battery, Full Duplex communication, dual microphones with AI-based noise suppression and acoustic echo cancellation |
| OTHERS | Xiaomi Redmi Note 9T | Microsoft Surface Duo 2 |
|---|
| Included Accessories | Protective cover, power adapter, SIM card removal tool, USB-C cable | SIM card removal tool, USB-C headset, Surface Duo 2 USB-C cable | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Low Blue Light Certification | HEARING AID M4/T3 |
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