In depth comparison and review of OnePlus 6T and Xiaomi MI 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 | OnePlus 6T | Xiaomi MI 9 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 157.5 mm | 157.5 mm | Both phones are the same height. |
| Width | 74.8 mm | 74.67 mm | OnePlus 6T has greater width than Xiaomi MI 9. |
| Depth | 8.2 mm | 7.61 mm | Xiaomi MI 9 is narrower than OnePlus 6T. |
| Weight | 185 g | 173 g | Xiaomi MI 9 is lighter than OnePlus 6T. |
| Body Colour | Mirror black | Ocean blue | Piano black | |
| Body Material | Glass | Curved glass | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | - | 1.301 W/kg (body), 1.389 W/kg (head) | |
| Connector Type | Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | OnePlus 6T | Xiaomi MI 9 |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | Optic AMOLED | AMOLED | |
| Screen Size (Display Size) | 6.41" | 6.39" | OnePlus 6T has larger screen size than Xiaomi MI 9. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2340 x 1080 pixels | Both phones have the same screen resolution. |
| Display Format | - | Full HD+ | |
| Pixel Density | 402 ppi | 403 ppi | Xiaomi MI 9 has better pixel density than OnePlus 6T. |
| Aspect Ratio | 19.5:9 | - | |
| Max Brightness | - | 600 cd/m² | |
| Contrast Ratio | - | 60000:1 | |
| HDR | - | Yes | Xiaomi MI 9 has HDR. |
| HDR Technology | - | HDR10 | |
| Display Enhancement Technology | Adaptive mode | Sunshine mode 2.0 | |
| Display Features | 2.5D Glass, Reading mode, night mode | Always-on display, Reading mode, Colour temperature adjustment, night mode, Wide Colour Gamut (WCG) | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 6 (scratch resistant glass) | Fingerprint-resistant coating, Corning Gorilla Glass 6 (scratch resistant glass), oil protective coating |
| PROCESSOR | OnePlus 6T | Xiaomi MI 9 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 845 | Qualcomm Snapdragon 855 | |
|---|---|---|---|
| Clock Speed | 2.8 GHz | 2.84 GHz | Xiaomi MI 9 has higher clock speed than OnePlus 6T. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | Yes | Both phones have 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 630 | Qualcomm ADRENO 640 |
| MEMORY | OnePlus 6T | Xiaomi MI 9 |
|---|
| RAM | LPDDR4X SDRAM - 6 GB | LPDDR4X SDRAM - 6 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 64 GB | OnePlus 6T has more internal memory than Xiaomi MI 9. |
| CAMERA | OnePlus 6T | Xiaomi MI 9 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 3 | |
|---|---|---|---|
| Sensor Resolution | 16 Megapixel | 48 Megapixel | Xiaomi MI 9 has better camera resolution than OnePlus 6T. |
| Sensor Name | Sony Exmor RS IMX519 sensor | Sony Exmor RS IMX586 sensor | |
| Lens Type | - | Ultra wide-angle lens | |
| Lens Aperture | F/1.7 | F/1.75 | OnePlus 6T has better lens aperture than OnePlus 6T. |
| Pixel Size | - | 0.8 μm | |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | OnePlus 6T has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | - | Yes | |
| Optical Zoom | - | 2x | |
| Digital Zoom | - | 10x | |
| Special Effects | Portrait, HDR | HDR | |
| Camera Modes | Panorama, Time-lapse mode, Pro mode, portrait mode | Burst mode, Panorama, portrait mode, AI Beautify, Smart ultra-wide angle mode, Ultra nightscape mode, Photo timer, Level display, Custom watermark, Full body portrait mode, Moon mode | |
| Face Recognition (Face ID) | - | Face recognition | Xiaomi MI 9 has face detection. |
| Light Source | Dual LED flash | Dual 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, 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 | 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, 3840 x 2160 (4K) at 60 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) | Electronic Image Stabiliser (EIS), RAW image capture, Detect Contrast Auto-Focus (DCAF), Dynamic Denoise, Clear Image | Sapphire crystal lens cover, Phase Detect Auto-Focus (PDAF), Dynamic photos, video stabilisation, Contrast Auto-Focus, 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, Quick motion |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 20 Megapixel | 12 Megapixel | OnePlus 6T has better second camera resolution than Xiaomi MI 9. |
|---|---|---|---|
| Sensor Name (2nd Camera) | Sony Exmor RS IMX376K sensor | - | |
| Lens Type (2nd Camera) | Wide-angle lens | Telephoto lens | |
| Lens Aperture (2nd Camera) | F/1.7 | F/2.2 | OnePlus 6T has better second camera lens aperture than OnePlus 6T. |
| Pixel Size (2nd Camera) | - | 1 μm | |
| Camera Features (2nd Camera) | Phase Detect Auto-Focus (PDAF) | Macro photography |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 16 Megapixel | |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (3rd Camera) | - | F/2.2 | |
| Pixel Size (3rd Camera) | - | 1 μm |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 16 Megapixel | 20 Megapixel | Xiaomi MI 9 has better front camera resolution than OnePlus 6T. |
| Sensor Name (Front) | Sony Exmor RS IMX371 sensor | - | |
| Lens Aperture (Front) | - | F/2.0 | |
| Pixel Size (Front) | - | 0.9 μm | |
| Focus Adjustment | Focus free | - | |
| Special Effects (Front) | HDR | HDR, Magic mirror | |
| Camera Modes (Front) | Time-lapse mode, Face Beauty | AI portrait mode, AI Beautify, AI makeup | |
| Face Recognition (Face ID) | Smile Capture | Face recognition | Both phones have face detection. |
| Light Source (Front) | Display 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, 1280 x 720 (720p) at 30 fps | |
| Camera Features (Front) | Electronic Image Stabiliser (EIS) | Self-timer, age recognition, Video Beautify, AI scene detection, AI studio lighting, Eye light, AI feature adjustment, AI lens flare |
| BATTERY AND CHARGING | OnePlus 6T | Xiaomi MI 9 |
|---|
| Battery Capacity (Battery Size) | 3700 mAh | 3300 mAh | OnePlus 6T has larger battery capacity than Xiaomi MI 9. |
|---|---|---|---|
| Fast Charging Technology | - | Qualcomm Quick Charge 4.0+ | Xiaomi MI 9 has fast charging technology. |
| Wireless Charging Standards | - | WPC, Qi |
| CELLULAR | OnePlus 6T | Xiaomi MI 9 |
|---|
| Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | OxygenOS (based on Android Pie) | - | |
| User Interface | - | MIUI 10 | |
| Intelligent Assistant | - | Google Assistant | |
| Payment Technology | - | Android Pay | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | OnePlus 6T | Xiaomi MI 9 |
|---|
| Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, TDD-LTE | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X | - | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8, Band 9, Band 19 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900, 1700, 800 | 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 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 29, Band 30, Band 32, Band 34, Band 38, Band 39, Band 40, Band 41, Band 46, Band 66, Band 71 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 20, Band 28, Band 38, Band 39, Band 40 | |
| 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 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 700d, FDD 2300 WCS, FDD 1500 L, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 5150, FDD 1700 - 2110 AWS-3, FDD 600 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 1900, TDD 2300 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| WLAN Security | - | WPA3 | |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | OnePlus 6T | Xiaomi MI 9 |
|---|
| Supported Digital Audio Standards | WAV, WMA, AAC, MP3, FLAC, AAC +, OGG, APE (Monkey's Audio), M4A, apt-X, IMY, MID, AMR-WB, AMR-NB, apt-X HD | WAV, AAC, AMR, MP3, FLAC, apt-X, LDAC, apt-X HD | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, MOV, MPEG-4, WMV, 3GP, TS, WebM, HEVC, H.265 | MKV, VC-1, XviD, MPEG-4, H.264, M4V, HEVC, VP8, VP9 | |
| Sound Enhancements | Dirac Power Sound technology, Dirac HD Sound | Qualcomm TrueWireless Stereo Plus |
| FEATURES | OnePlus 6T | Xiaomi MI 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 | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, hall sensor, RGB sensor | Accelerometer, ambient light sensor, digital compass, gyro sensor, ultrasonic proximity sensor, linear rotation vector sensor | |
| Security Devices | Face recognition, fingerprint reader | Fingerprint reader (under display) | |
| Additional Phone Features | Face Unlock, Noise Cancellation Technology, MIMO technology, Android Sensor Hub, RGB LED notification light, AI Engine | Infrared remote control, MIMO technology, MU-MIMO technology, MI Turbo, GAME Turbo |
| OTHERS | OnePlus 6T | Xiaomi MI 9 |
|---|
| Included Accessories | SIM card removal tool, Dash Charge Type-C Cable, Dash Charge Adapter, USB-C to 3.5 jack adapter, screen protector (pre-applied), protective case | Protective cover, SIM card removal tool, USB-C cable, USB-C audio adapter, 18W QC3.0 charger | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland Certified Safe Fast-Charge System |
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