In depth comparison and review of Xiaomi MI 9 and Samsung Galaxy Z Fold4. 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 | Samsung Galaxy Z Fold4 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | SM-F936B/DS | |
| Form Factor | Touch | Folder - touch screen, dual screen | |
| Height | 157.5 mm | 155.1 mm | Xiaomi MI 9 has greater height than Samsung Galaxy Z Fold4. |
| Width | 74.67 mm | 67.1 mm | Xiaomi MI 9 has greater width than Samsung Galaxy Z Fold4. |
| Depth | 7.61 mm | 15.8 mm | Xiaomi MI 9 is narrower than Xiaomi MI 9. |
| Weight | 173 g | 263 g | Xiaomi MI 9 is lighter than Xiaomi MI 9. |
| Dimensions Details | - | Folded - 67.1 mm x 15.8 mm x 155.1 mm Unfolded - 130.1 mm x 6.3 mm x 155.1 mm |
|
| Body Colour | Ocean blue | Piano black | Burgundy | Greygreen | Beige | Phantom black | |
| Body Material | Curved glass | Corning Gorilla Glass Victus, Armour Aluminium frame | |
| Protection | - | Water-resistant | |
| Waterproof (Water-resistant) | - | Yes | Samsung Galaxy Z Fold4 is waterproof. |
| IP rating | - | IPX8 | |
| SAR Value | 1.301 W/kg (body), 1.389 W/kg (head) | 2.83 W/kg (limb), 1.506 W/kg (body), 1.301 W/kg (head) | |
| Connector Type | USB Type-C - 24 pin USB-C | 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 MI 9 | Samsung Galaxy Z Fold4 |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | Dynamic AMOLED 2X | |
| Foldable Display | - | Yes | |
| Display Design | - | Inward folding | |
| Screen Size (Display Size) | 6.39" | 7.6" | Samsung Galaxy Z Fold4 has larger screen size than Xiaomi MI 9. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2176 x 1812 pixels | Samsung Galaxy Z Fold4 has better screen resolution than Xiaomi MI 9. |
| Display Format | Full HD+ | QXGA+ | |
| Pixel Density | 403 ppi | 374 ppi | Xiaomi MI 9 has better pixel density than Samsung Galaxy Z Fold4. |
| Aspect Ratio | - | 21.6:18 | |
| Max Brightness | 600 cd/m² | - | |
| Colour Depth | - | 16.7 million colours | |
| Contrast Ratio | 60000:1 | - | |
| HDR | Yes | Yes | Both phones have HDR. |
| HDR Technology | HDR10 | HDR10+ | |
| Display Enhancement Technology | Sunshine mode 2.0 | - | |
| Display Refresh Rate | - | 120 Hz | |
| Display Features | Always-on display, Reading mode, Colour temperature adjustment, night mode, Wide Colour Gamut (WCG) | AOD(Always On Display), Edge Lighting, Video Wallpaper | |
| Display Protection (Screen Protector) | Fingerprint-resistant coating, Corning Gorilla Glass 6 (scratch resistant glass), oil protective coating | Samsung Ultra Thin Glass |
| SECOND DISPLAY |
|---|
| Second Display Type | - | OLED display - colour | |
|---|---|---|---|
| Second Display Screen Size | - | 6.2" | |
| Second Display Resolution | - | 2316 x 904 pixels | |
| Second Display Colour Depth | - | 16.7 million colours |
| UNFOLDED DISPLAY |
|---|
| Unfolded Display Screen Size | - | 7.6 in | |
|---|---|---|---|
| Unfolded Display Resolution | - | 2176 x 1812 pixels |
| PROCESSOR | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 855 | Qualcomm Snapdragon 8+ Gen 1 | |
|---|---|---|---|
| Processor Number | - | SM8475 | |
| Clock Speed | 2.84 GHz | 3.18 GHz | Samsung Galaxy Z Fold4 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 | - |
| MEMORY | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| RAM | LPDDR4X SDRAM - 6 GB | 12 GB | Samsung Galaxy Z Fold4 has more RAM than Xiaomi MI 9. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 256 GB | Samsung Galaxy Z Fold4 has more internal memory than Xiaomi MI 9. |
| User Memory | - | 216.3 GB | |
| Memory Interface | - | UFS 3.1 |
| CAMERA | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 50 Megapixel | Samsung Galaxy Z Fold4 has better camera resolution than Xiaomi MI 9. |
| Sensor Name | Sony Exmor RS IMX586 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) | - | 85 degree(s) | |
| Pixel Size | 0.8 μm | 1 μm | Samsung Galaxy Z Fold4 has larger camera pixel size than Xiaomi MI 9. |
| Optical Image Stabiliser (OIS) | - | Dual OIS (Optical Image Stabilisation) | Samsung Galaxy Z Fold4 has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Optical Zoom | 2x | 3x | Samsung Galaxy Z Fold4 has better optical zoom than Xiaomi MI 9. |
| Digital Zoom | 10x | 12x | Samsung Galaxy Z Fold4 has better digital zoom than Xiaomi MI 9. |
| Self-Timer Delay | - | Yes | |
| Special Effects | HDR | Face retouch, Grid Line, selfie colour tone | |
| HDR Mode | - | Super 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 | Panorama, Slow motion mode, Pro mode, HYPERLAPSE, Super Slow-mo, Flowers, Greenery, Trees, Sky, Beaches, Watersides, Snow, Backlit, Text, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Night view, Portrait, Night, Mountain, Filter mode, Single Take, Pro Video, Portrait video, Director's View, Capture View | |
| Face Recognition (Face ID) | Face recognition | Face detection | Both phones have face detection. |
| Light Source | Dual flash | High CRI 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, Super slow motion video 1280 x 720 (720p) at 960 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 30 fps, 7680 x 4320 (8K UHD) at 24 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 | Playback zoom, Motion photo, QR-code scanner, RAW image capture, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, AR sticker, Scene Optimiser, Flaw detection, AI Super Resolution, Shot suggestions, AR Emoji, HDR10+ recording, Super steady, Zoom-In Mic, HEIF image capture, AR Doodle, Microphone Control, HEVC (High Efficiency Video coding), Dual preview, Auto framing, Capture View mode, Corning Gorilla Glass DX (protective lens glass), Auto FPS, AR Emoji Studio, Deco PIC, 30x Space Zoom, iDCG (Intra-scene Dual Conversion Gain), Super Night Solution |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 12 Megapixel | Both phones have the same second camera resolution. |
|---|---|---|---|
| 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. |
| Field of View (2nd Camera) | - | 123 degree(s) | |
| Pixel Size (2nd Camera) | 1 μm | 1.12 μm | Samsung Galaxy Z Fold4 has larger second camera pixel size than Xiaomi MI 9. |
| Camera Features (2nd Camera) | Macro photography | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 16 Megapixel | 10 Megapixel | Xiaomi MI 9 has higher resolution third camera than Samsung Galaxy Z Fold4. |
|---|---|---|---|
| Lens Type (3rd Camera) | Ultra wide-angle lens | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.2 | F/2.4 | Xiaomi MI 9 has better third camera lens aperture than Xiaomi MI 9. |
| Field of View (3rd Camera) | - | 36 degree(s) | |
| Pixel Size (3rd Camera) | 1 μm | 1 μm | Both phones have the same third camera pixel size. |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 2 | |
|---|---|---|---|
| Sensor Resolution (Front) | 20 Megapixel | 10 Megapixel | Xiaomi MI 9 has better front camera resolution than Samsung Galaxy Z Fold4. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | Xiaomi MI 9 has better front lens aperture than Xiaomi MI 9. |
| Field of View (Front) | - | 85 degree(s) | |
| Pixel Size (Front) | 0.9 μm | 1.22 μm | Samsung Galaxy Z Fold4 has larger front camera pixel size than Xiaomi MI 9. |
| 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 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 | - |
| SECOND FRONT CAMERA |
|---|
| Sensor Resolution (2nd Front) | - | 4 Megapixel | |
|---|---|---|---|
| Lens Aperture (2nd Front) | - | F/1.8 | |
| Field of View (2nd Front) | - | 80 degree(s) | |
| Pixel Size (2nd Front) | - | 2 μm | |
| Camera Features (2nd Front) | - | Under display camera |
| BATTERY AND CHARGING | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| Battery Capacity (Battery Size) | 3300 mAh | 4400 mAh | Samsung Galaxy Z Fold4 has larger battery capacity than Xiaomi MI 9. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 4.0+ | Qualcomm Quick Charge 2.0, Adaptive Fast Charging | Both phones have fast charging technology. |
| Wireless Charging | - | Yes | Samsung Galaxy Z Fold4 can be charged wirelessly. |
| Wireless Charging Standards | WPC, Qi | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | |
| Talk Time | - | 2340 minutes | |
| Run Time Details | - | Active online usage (LTE): up to 16 hrs Active online usage (Wi-Fi): up to 16 hrs Playback (wireless video): up to 20 hrs Playback (wireless audio): up to 72 hrs Talk (4G): up to 2340 min |
| CELLULAR | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | Samsung Galaxy Z Fold4 has more advanced generation mobile network. |
| Operating System | - | Android 12L | |
| User Interface | MIUI 10 | One UI 4.1.1 | |
| Intelligent Assistant | Google Assistant | Bixby | |
| Payment Technology | Android Pay | Samsung Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | FDD-LTE, TDD-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 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 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 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 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | |
| 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 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | - | N1, n2, n3, n5, n7, n8, n20, n28, n38, n41, n66, n75, n77, n78, n40, n25, 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 2500, FDD AWS-3, SDL DL 1500+, TDD TD 3700, TDD TD 3500, TDD 2300, FDD 1900, n12 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax, Wi-Fi 6E | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.2 | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Ultra-Wideband (UWB) | - | Yes | Samsung Galaxy Z Fold4 has UWB wireless technology. |
| WLAN Security | WPA3 | - | |
| Modem | - | Snapdragon X65 5G | |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, apt-X, LDAC, apt-X HD | WAV, WMA, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128 | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, VC-1, XviD, MPEG-4, H.264, M4V, HEVC, VP8, VP9 | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | Qualcomm TrueWireless Stereo Plus | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, Dolby Digital sound |
| FEATURES | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| 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, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor, light sensor | |
| Security Devices | Fingerprint reader (under display) | Face recognition, fingerprint reader (side) | |
| Additional Phone Features | Infrared remote control, MIMO technology, MU-MIMO technology, MI Turbo, GAME Turbo | Multitasking, Air View, MIMO technology, Screen Write, Smart Select, Samsung KNOX, High AOP Mic, Smart View, Live message, Screen off memo, Samsung DeX support, Bixby Vision, Secure Folder function, TalkBack, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, Samsung Smart Switch, dual battery, AR Doodle, PENUP, Flex mode, Multi Active Window, S Pen support, Multi View, Samsung Seamless Codec |
| OTHERS | Xiaomi MI 9 | Samsung Galaxy Z Fold4 |
|---|
| 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 cable | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Certified Safe Fast-Charge System | VDE, IPX8, IEC 61960 | |
| Max Depth of Water Resistance | - | 1.5 m |
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