In depth comparison and review of Xiaomi MI 9 and Samsung Galaxy S21+ 5G. 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 S21+ 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | SM-G996B/DS | |
| Form Factor | Touch | Touch | |
| Height | 157.5 mm | 161.5 mm | Samsung Galaxy S21+ 5G has greater height than Xiaomi MI 9. |
| Width | 74.67 mm | 75.6 mm | Samsung Galaxy S21+ 5G has greater width than Xiaomi MI 9. |
| Depth | 7.61 mm | 7.8 mm | Xiaomi MI 9 is narrower than Xiaomi MI 9. |
| Weight | 173 g | 200 g | Xiaomi MI 9 is lighter than Xiaomi MI 9. |
| Body Colour | Ocean blue | Piano black | Phantom black | Phantom silver | Phantom violet | Phantom gold | Phantom red | |
| Body Material | Curved glass | - | |
| Protection | - | Dustproof, splashproof, water-resistant | |
| Waterproof (Water-resistant) | - | Yes | Samsung Galaxy S21+ 5G is waterproof. |
| IP rating | - | IP68 | |
| SAR Value | 1.301 W/kg (body), 1.389 W/kg (head) | 1.335 W/kg (body), 0.541 W/kg (head), 2.23 W/kg (limb) | |
| 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 S21+ 5G |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | Infinity-O Dynamic AMOLED 2X | |
| Screen Size (Display Size) | 6.39" | 6.7" | Samsung Galaxy S21+ 5G has larger screen size than Xiaomi MI 9. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2400 x 1080 pixels | Samsung Galaxy S21+ 5G has better screen resolution than Xiaomi MI 9. |
| Display Format | Full HD+ | Full HD+ | |
| Pixel Density | 403 ppi | 394 ppi | Xiaomi MI 9 has better pixel density than Samsung Galaxy S21+ 5G. |
| 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 | Eye Comfort Shield | |
| 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) | |
| 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 | Samsung Galaxy S21+ 5G |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 855 | Samsung Exynos 2100 | |
|---|---|---|---|
| Clock Speed | 2.84 GHz | 2.9 GHz | Samsung Galaxy S21+ 5G 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 | Mali-G78 MP14 |
| MEMORY | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| RAM | LPDDR4X SDRAM - 6 GB | LPDDR5 SDRAM - 8 GB | Samsung Galaxy S21+ 5G has more RAM than Xiaomi MI 9. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | Samsung Galaxy S21+ 5G has more internal memory than Xiaomi MI 9. |
| User Memory | - | 102.2 GB |
| CAMERA | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 12 Megapixel | Xiaomi MI 9 has better camera resolution than Samsung Galaxy S21+ 5G. |
| Sensor Name | Sony Exmor RS IMX586 sensor | - | |
| Lens Type | Ultra wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture | F/1.75 | F/2.2 | Xiaomi MI 9 has better lens aperture than Xiaomi MI 9. |
| Field of View (FoV) | - | 120 degree(s) | |
| Pixel Size | 0.8 μm | 1.4 μm | Samsung Galaxy S21+ 5G has larger camera pixel size than Xiaomi MI 9. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy S21+ 5G has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Optical Zoom | 2x | 3x | Samsung Galaxy S21+ 5G has better optical zoom than Xiaomi MI 9. |
| Digital Zoom | 10x | 30x | Samsung Galaxy S21+ 5G has better digital zoom than Xiaomi MI 9. |
| Self-Timer Delay | - | Yes | |
| Special Effects | HDR | Face retouch, Grid Line | |
| HDR Mode | - | Auto HDR mode | |
| 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, Clothes, Night view, Night, Motion Photo, Mountain, Single Take, Pro Video, Director's View | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi MI 9 has 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 60 fps, 1280 x 720 (720p) 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, 7680 x 4320 (UHD 8K) at 24fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 60 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, blink detection, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, Scene Optimiser, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Super steady, Quick Measure, Zoom-In Mic, Space Zoom, Take 33MP still photos while playing 8K video, Hybrid Optic Zoom 3x, Super Resolution Zoom up to 30x, Digital zoom up to 12x for video |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 12 Megapixel | Both phones have the same second camera resolution. |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/1.76" | |
| Lens Type (2nd Camera) | Telephoto lens | Wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | F/1.8 | Samsung Galaxy S21+ 5G has better second camera lens aperture than Xiaomi MI 9. |
| Field of View (2nd Camera) | - | 79 degree(s) | |
| Pixel Size (2nd Camera) | 1 μm | 1.8 μm | Samsung Galaxy S21+ 5G has larger second camera pixel size than Xiaomi MI 9. |
| Camera Features (2nd Camera) | Macro photography | OIS (Optical Image Stabilisation), Super Speed Dual Pixel AF |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 16 Megapixel | 64 Megapixel | Samsung Galaxy S21+ 5G has higher resolution third camera than Xiaomi MI 9. |
|---|---|---|---|
| Sensor Size (3rd Camera) | - | 1/1.72" | |
| Lens Type (3rd Camera) | Ultra wide-angle lens | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.2 | F/2.0 | Samsung Galaxy S21+ 5G has better third camera lens aperture than Xiaomi MI 9. |
| Field of View (3rd Camera) | - | 76 degree(s) | |
| Pixel Size (3rd Camera) | 1 μm | 0.8 μm | Xiaomi MI 9 has larger third camera pixel size than Samsung Galaxy S21+ 5G. |
| Camera Features (3rd Camera) | - | Phase Detect Auto-Focus (PDAF) |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 20 Megapixel | 10 Megapixel | Xiaomi MI 9 has better front camera resolution than Samsung Galaxy S21+ 5G. |
| 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) | - | 80 degree(s) | |
| Pixel Size (Front) | 0.9 μm | 1.22 μm | Samsung Galaxy S21+ 5G 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 | - | |
| 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 AF |
| BATTERY AND CHARGING | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| Battery Capacity (Battery Size) | 3300 mAh | 4800 mAh | Samsung Galaxy S21+ 5G has larger battery capacity than Xiaomi MI 9. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 4.0+ | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 | Both phones have fast charging technology. |
| Wireless Charging | - | Yes | Samsung Galaxy S21+ 5G can be charged wirelessly. |
| Wireless Charging Standards | WPC, Qi | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | |
| Talk Time | - | 2400 minutes | |
| Run Time Details | - | Talk (4G): up to 2400 min Active online usage (LTE): up to 15 hrs Active online usage (Wi-Fi): up to 17 hrs Playback (wireless video): up to 22 hrs Playback (wireless audio): up to 75 hrs |
| CELLULAR | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | Samsung Galaxy S21+ 5G has more advanced generation mobile network. |
| Operating System | - | Android 11 | |
| User Interface | MIUI 10 | - | |
| Intelligent Assistant | Google Assistant | Bixby | |
| Payment Technology | Android Pay | Samsung Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | FDD-LTE, TDD-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 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, n3, n5, n7, n8, n20, n28, n38, n41, n66, n77, n78, n40 | |
| 5G NR Frequency | - | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, TDD TD 3700, TDD TD 3500, TDD 2300 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax | |
| 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 | - |
| MEDIA | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| 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, DSD, 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, stereo speakers tuned by AKG, Dolby Digital sound |
| FEATURES | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| 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, digital compass, gyro sensor, ultrasonic proximity sensor, linear rotation vector sensor | Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor | |
| 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 | Air View, MIMO technology, Smart Select, Samsung KNOX, Smart View, Live message, Screen off memo, Bixby Vision, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, AR Doodle, PENUP, Bixby key, Samsung Knox Vault, Private Share function, Enhanced Game Booster |
| OTHERS | Xiaomi MI 9 | Samsung Galaxy S21+ 5G |
|---|
| 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 | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Certified Safe Fast-Charge System | IP68, HAC (Hearing Aid Compatible) | |
| Max Depth of Water Resistance | - | 1.5 m |
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