In depth comparison and review of Xiaomi MI 9 and ASUS Zenfone 8. 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 9 | ASUS Zenfone 8 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | ZS590KS | |
| Form Factor | Touch | Touch | |
| Height | 157.5 mm | 148 mm | Xiaomi MI 9 has greater height than ASUS Zenfone 8. |
| Width | 74.67 mm | 68.5 mm | Xiaomi MI 9 has greater width than ASUS Zenfone 8. |
| Depth | 7.61 mm | 8.9 mm | Xiaomi MI 9 is narrower than Xiaomi MI 9. |
| Weight | 173 g | 169 g | ASUS Zenfone 8 is lighter than Xiaomi MI 9. |
| Body Colour | Ocean blue | Piano black | Obsidian black | |
| Body Material | Curved glass | - | |
| Protection | - | Drop-proof, water-resistant, dust-resistant | |
| Waterproof (Water-resistant) | - | Yes | ASUS Zenfone 8 is waterproof. |
| IP rating | - | IP68, IP65 | |
| SAR Value | 1.301 W/kg (body), 1.389 W/kg (head) | 1.582 W/kg (body), 1.412 W/kg (head), 3.498 W/kg (limb) | |
| Integrated Components | - | FM radio | |
| Connector Type | USB Type-C - 24 pin USB-C | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | AMOLED | |
| Screen Size (Display Size) | 6.39" | 5.9" | Xiaomi MI 9 has larger screen size than ASUS Zenfone 8. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2400 x 1080 pixels | ASUS Zenfone 8 has better screen resolution than Xiaomi MI 9. |
| Display Format | Full HD+ | Full HD+ | |
| Pixel Density | 403 ppi | - | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | 600 cd/m² | 1100 cd/m² | ASUS Zenfone 8 has better display brightness than Xiaomi MI 9. |
| Contrast Ratio | 60000:1 | - | |
| HDR | Yes | Yes | Both phones have HDR. |
| HDR Technology | HDR10 | HDR10+ | |
| Display Enhancement Technology | Sunshine mode 2.0 | DC Dimming | |
| Display Refresh Rate | - | 120 Hz | |
| Touch Sampling Rate | - | 240 Hz | |
| Display Features | Always-on display, Reading mode, Colour temperature adjustment, night mode, Wide Colour Gamut (WCG) | Always-on display, Glove Touch, Delta-E < 1, 107% NTSC, 151.9% sRGB, 112% DCI-P3 | |
| Display Protection (Screen Protector) | Fingerprint-resistant coating, Corning Gorilla Glass 6 (scratch resistant glass), oil protective coating | Corning Gorilla Glass Victus (scratch resistant glass) |
| PROCESSOR | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 855 | Qualcomm Snapdragon 888 5G | |
|---|---|---|---|
| Clock Speed | 2.84 GHz | 2.842 GHz | ASUS Zenfone 8 has higher clock speed than Xiaomi MI 9. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi MI 9 has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 640 | Qualcomm ADRENO 660 |
| MEMORY | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| RAM | LPDDR4X SDRAM - 6 GB | LPDDR5 SDRAM - 8 GB | ASUS Zenfone 8 has more RAM than Xiaomi MI 9. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | ASUS Zenfone 8 has more internal memory than Xiaomi MI 9. |
| Memory Interface | - | UFS 3.1 |
| CAMERA | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 2 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 64 Megapixel | ASUS Zenfone 8 has better camera resolution than Xiaomi MI 9. |
| Sensor Size | - | 1/1.7" | |
| Sensor Name | Sony Exmor RS IMX586 sensor | Sony Exmor RS IMX686 sensor | |
| Lens Type | Ultra wide-angle lens | Wide-angle lens | |
| Lens Aperture | F/1.75 | F/1.8 | Xiaomi MI 9 has better lens aperture than Xiaomi MI 9. |
| Field of View (FoV) | - | 78.3 degree(s) | |
| Pixel Size | 0.8 μm | 1.6 μm | ASUS Zenfone 8 has larger camera pixel size than Xiaomi MI 9. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | ASUS Zenfone 8 has optical stabilisation. |
| Focus Adjustment | Automatic | - | |
| Laser Auto Focus | Yes | - | |
| Minimum Focal Length (Focal Distance) | - | 26.6 mm | |
| Optical Zoom | 2x | - | |
| Digital Zoom | 10x | - | |
| Special Effects | HDR | - | |
| Camera Modes | 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 | Slow motion video, Time-lapse mode, Pro mode | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi MI 9 has face detection. |
| Light Source | Dual flash | LED 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, 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 | 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, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 24 fps, Slo-mo video 3840 x 2160 (4K) at 120 fps | |
| Camera Features (Functions) | 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 | Phase Detect Auto-Focus (PDAF), 3-axis electronic image stabilisation, 4-axis optical image stabilisation, Motion tracking, Quad Bayer technology, 2x1 On-Chip Lens (OCL) |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 12 Megapixel | Both phones have the same second camera resolution. |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/2.55" | |
| Sensor Name (2nd Camera) | - | Sony Exmor RS IMX363 sensor | |
| Lens Type (2nd Camera) | Telephoto lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
| Pixel Size (2nd Camera) | 1 μm | 1.4 μm | ASUS Zenfone 8 has larger second camera pixel size than Xiaomi MI 9. |
| Focal Length Equivalent to 35mm Camera | - | 14.3 | |
| Camera Features (2nd Camera) | Macro photography | Real-time distortion correction, 4cm macro photography, Dual Phase Detect Auto-Focus (PDAF) |
| 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) | 20 Megapixel | 12 Megapixel | Xiaomi MI 9 has better front camera resolution than ASUS Zenfone 8. |
| Sensor Name (Front) | - | Sony Exmor RS IMX663 sensor | |
| Lens Aperture (Front) | F/2.0 | F/2.4 | Xiaomi MI 9 has better front lens aperture than Xiaomi MI 9. |
| Pixel Size (Front) | 0.9 μm | 1.22 μm | ASUS Zenfone 8 has larger front camera pixel size than Xiaomi MI 9. |
| Focus Adjustment | - | Automatic | |
| Special Effects (Front) | HDR, Magic mirror | - | |
| Camera Modes (Front) | AI portrait mode, AI Beautify, AI makeup | Portrait | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi MI 9 has face detection. |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) 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 | Dual Pixel technology, EIS video stabilisation, Dual Phase Detect Auto-Focus (PDAF) |
| BATTERY AND CHARGING | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Battery Capacity (Battery Size) | 3300 mAh | 4000 mAh | ASUS Zenfone 8 has larger battery capacity than Xiaomi MI 9. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 4.0+ | Qualcomm Quick Charge 4.0, Power Delivery 3.0 | Both phones have fast charging technology. |
| Wireless Charging Standards | WPC, Qi | - |
| CELLULAR | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | ASUS Zenfone 8 has more advanced generation mobile network. |
| Operating System | - | Android 11 | |
| User Interface | MIUI 10 | ASUS ZenUI 8.0 | |
| Intelligent Assistant | Google Assistant | - | |
| Payment Technology | Android Pay | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC |
| COMMUNICATIONS | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE, DC-HSPA+, Gigabit LTE, 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 3, Band 4, Band 5, Band 6, Band 8, Band 19 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 1800, 1700, 850, 800, 900, 800 | |
| 4G LTE Band | 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 | 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 34, Band 38, Band 39, 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 800 DD, FDD 700 APT, TDD 2600, TDD 1900, TDD 2300 | 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, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500 | |
| 5G NR Band | - | N1, n2, n3, n5, n7, n8, n20, n28, n38, n77, n78, n12 | |
| 5G NR Frequency | - | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 3700, TDD TD 3500, n12 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.2 EDR | |
| Bluetooth Profiles | - | HFP, OPP, PAN, A2DP, AVRCP, HID | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| WLAN Security | WPA3 | - | |
| Modem | - | Snapdragon X60 5G | |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, apt-X, LDAC, apt-X HD | - | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, VC-1, XviD, MPEG-4, H.264, M4V, HEVC, VP8, VP9 | - | |
| Sound Enhancements | Qualcomm TrueWireless Stereo Plus | Dirac HD Sound, ASUS Audio Wizard, Hi-Res audio certified, OZO Audio, Qualcomm aptX audio, Qualcomm aptX HD audio, Qualcomm aptX Adaptive | |
| Audio Amplifier | - | Dual Cirrus Logic CS35L45 |
| FEATURES | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, digital compass, gyro sensor, ultrasonic proximity sensor, linear rotation vector sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, G-sensor, gyroscope | |
| Security Devices | Fingerprint reader (under display) | Fingerprint reader (under display), face recognition | |
| Additional Phone Features | Infrared remote control, MIMO technology, MU-MIMO technology, MI Turbo, GAME Turbo | MIMO technology, AudioWizard, One Hand Mode, ARCore, Triple internal microphones with ASUS Noise Reduction Technology, Multi-Magnet Stereo Speakers |
| OTHERS | Xiaomi MI 9 | ASUS Zenfone 8 |
|---|
| Included Accessories | Protective cover, SIM card removal tool, USB-C cable, USB-C audio adapter, 18W QC3.0 charger | SIM card removal tool, USB-C to USB-C cable, protective case, power adapter (30 W) | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Certified Safe Fast-Charge System | IP68, IP65, SGS Eye Care Display Certification, SGS Seamless Pro 120Hz Certification | |
| Max Height of Shock Resistance | - | 2 m |
cs
sk
de
it
es
fr
hu
pt
ru
pl
br
ro
