In depth comparison and review of OnePlus 3 and Xiaomi MI 9 SE. 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 3 | Xiaomi MI 9 SE |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 152.7 mm | 147.5 mm | OnePlus 3 has greater height than Xiaomi MI 9 SE. |
| Width | 74.7 mm | 70.5 mm | OnePlus 3 has greater width than Xiaomi MI 9 SE. |
| Depth | 7.4 mm | 7.45 mm | OnePlus 3 is narrower than OnePlus 3. |
| Weight | 158 g | 155 g | Xiaomi MI 9 SE is lighter than OnePlus 3. |
| Body Colour | - | Ocean blue | Piano black | |
| Body Material | Anodised aluminium | Glass | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.645 W/kg (body), 0.995 W/kg (head) | 1.385 W/kg (body), 1.385 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 3 | Xiaomi MI 9 SE |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | Optic AMOLED | AMOLED | |
| Screen Size (Display Size) | 5.5" | 5.97" | Xiaomi MI 9 SE has larger screen size than OnePlus 3. |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 2340 x 1080 pixels | Xiaomi MI 9 SE has better screen resolution than OnePlus 3. |
| Display Format | Full HD | Full HD+ | |
| Pixel Density | 401 ppi | 432 ppi | Xiaomi MI 9 SE has better pixel density than OnePlus 3. |
| Max Brightness | - | 600 cd/m² | |
| Colour Depth | 16.7 million colours | - | |
| Contrast Ratio | - | 60000:1 | |
| HDR | - | Yes | Xiaomi MI 9 SE has HDR. |
| HDR Technology | - | HDR10 | |
| Display Enhancement Technology | - | Sunshine mode 2.0 | |
| Display Features | - | Always-on display, Colour temperature adjustment, night mode, Wide Colour Gamut (WCG), 256 ranks adjustable Reading mode | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 4 (scratch resistant glass) | Corning Gorilla Glass 5 (scratch resistant glass), fingerprint-resistant coating, oil protective coating |
| PROCESSOR | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 820 | Qualcomm Snapdragon 712 | |
|---|---|---|---|
| Processor Number | MSM8996 | - | |
| Clock Speed | 2.15 GHz | 2.3 GHz | Xiaomi MI 9 SE has higher clock speed than OnePlus 3. |
| Processor Core Qty | Quad-core | 8-core | Xiaomi MI 9 SE has higher processor core quantity than OnePlus 3. |
| 64-bit Architecture | Yes | Yes | Both phones have 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 530 | Qualcomm ADRENO 616 |
| MEMORY | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| RAM | 6 GB | LPDDR4X SDRAM - 6 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 64 GB | Both phones have the same internal memory capacity. |
| CAMERA | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 3 | |
|---|---|---|---|
| Sensor Resolution | 16 Megapixel | 48 Megapixel | Xiaomi MI 9 SE has better camera resolution than OnePlus 3. |
| Sensor Name | Sony Exmor RS IMX298 sensor | Sony Exmor RS IMX586 sensor | |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/2.0 | F/1.75 | Xiaomi MI 9 SE has better lens aperture than OnePlus 3. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | OnePlus 3 has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | - | Yes | |
| Optical Zoom | - | 2x | |
| Digital Zoom | - | 10x | |
| Special Effects | HDR | HDR | |
| HDR Mode | Auto HDR mode | - | |
| Camera Modes | Panorama | 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 detection | Face recognition | Both phones have face detection. |
| Light Source | LED light | Dual flash | |
| Video Resolutions | 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 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, Slo-mo video 1280 x 720 (720p) at 960 fps | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), Electronic Image Stabiliser (EIS), geotagging | 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) | - | 13 Megapixel | |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.4 | |
| Field of View (2nd Camera) | - | 123 degree(s) |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 8 Megapixel | |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Pixel Size (3rd Camera) | - | 1 μm |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 8 Megapixel | 20 Megapixel | Xiaomi MI 9 SE has better front camera resolution than OnePlus 3. |
| Sensor Name (Front) | Sony Exmor R IMX179 sensor | - | |
| Lens Aperture (Front) | F/2.0 | - | |
| Focus Adjustment | Focus free | - | |
| Special Effects (Front) | - | HDR, Magic mirror | |
| Camera Modes (Front) | - | AI portrait mode, AI Beautify, AI makeup | |
| Face Recognition (Face ID) | - | Face recognition | Xiaomi MI 9 SE has face detection. |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps | - | |
| Camera Features (Front) | - | Self-timer, age recognition, Video Beautify, AI scene detection, AI studio lighting, Eye light, AI feature adjustment, AI lens flare |
| BATTERY AND CHARGING | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Battery Capacity (Battery Size) | 3000 mAh | 3070 mAh | Xiaomi MI 9 SE has larger battery capacity than OnePlus 3. |
|---|---|---|---|
| Fast Charging Technology | - | Qualcomm Quick Charge 4.0+ | Xiaomi MI 9 SE has fast charging technology. |
| Battery Technology | Lithium Ion | - |
| CELLULAR | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | OxygenOS (based on Android 6.0.1) | - | |
| User Interface | - | MIUI 10 | |
| Intelligent Assistant | - | Google Assistant | |
| Payment Technology | - | Google Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | - | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | - | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | - | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 4, Band 5, Band 7, Band 12, Band 17, Band 30 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 700a, FDD 700b, FDD 2300 WCS | 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 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 4.2 | Bluetooth 5.0 | |
| Bluetooth Profiles | A2DP | - | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Supported Digital Audio Standards | WAV, WMA, MP3, FLAC, eAAC+ | WAV, AAC, AMR, MP3, FLAC, eAAC+, APE (Monkey's Audio), apt-X, LDAC, AMR-WB, AMR-NB, M4V, apt-X HD | |
|---|---|---|---|
| Supported Digital Video Standards | XviD, MPEG-4, DivX, H.265 | MKV, VC-1, XviD, MPEG-4, H.264, M4V, HEVC, VP8, VP9, H.265, MP4 | |
| Sound Enhancements | Dirac sound technologies | Qualcomm TrueWireless Stereo Plus |
| FEATURES | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Phone Functions | Speakerphone, call timer, conference call, flight mode, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, digital compass, gyro sensor | Accelerometer, ambient light sensor, digital compass, gyro sensor, ultrasonic proximity sensor, linear rotation vector sensor | |
| Security Devices | Fingerprint reader | Fingerprint reader (under display) | |
| Additional Phone Features | DLNA Certified, sharing media via DLNA | Infrared remote control, MIMO technology, MU-MIMO technology, MI Turbo, GAME Turbo |
| OTHERS | OnePlus 3 | Xiaomi MI 9 SE |
|---|
| Included Accessories | Screen protection film, USB cable, power adapter, SIM card removal tool | Protective cover, power adapter, SIM card removal tool, USB-C cable, USB-C to 3.5 jack audio cable | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland Certified Safe Fast-Charge System |
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