Detailed comparison and review of Xiaomi MI 9 and Samsung Galaxy A51 5G. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.
DESIGN AND DIMENSIONS | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Product Type | Smartphone | Smartphone | |
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Manufacturer Model Number | - | SM-A516B/DS | |
Form Factor | Touch | Touch | |
Height | 157.5 mm | 158.9 mm | Samsung Galaxy A51 5G has greater height than Xiaomi MI 9. |
Width | 74.67 mm | 73.6 mm | Xiaomi MI 9 has greater width than Samsung Galaxy A51 5G. |
Depth | 7.61 mm | 8.7 mm | Xiaomi MI 9 is narrower than Xiaomi MI 9. |
Weight | 173 g | 187 g | Xiaomi MI 9 is lighter than Xiaomi MI 9. |
Body Colour | Ocean blue | Piano black | Prism cube black | Prism cube white | |
Body Material | Curved glass | - | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 1.301 W/kg (body), 1.389 W/kg (head) | 1.555 W/kg (body), 0.496 W/kg (head) | |
Connector Type | USB Type-C - 24 pin USB-C | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
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SIM Card Type (Size) | Nano SIM | Nano SIM | |
SIM Card Qty | Dual-SIM | Dual-SIM | |
SIM Card Configuration Details | - | Nano SIM + nano SIM/microSD |
DISPLAY | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Display Type | OLED display | OLED display | |
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Display Technology | AMOLED | Infinity-O Super AMOLED | |
Screen Size (Display Size) | 6.39" | 6.5" | Samsung Galaxy A51 5G has larger screen size than Xiaomi MI 9. |
Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2400 x 1080 pixels | Samsung Galaxy A51 5G has better screen resolution than Xiaomi MI 9. |
Display Format | Full HD+ | Full HD+ | |
Pixel Density | 403 ppi | - | |
Max Brightness | 600 cd/m² | - | |
Colour Depth | - | 16.7 million colours | |
Contrast Ratio | 60000:1 | - | |
HDR | Yes | - | Xiaomi MI 9 has HDR. |
HDR Technology | HDR10 | - | |
Display Enhancement Technology | Sunshine mode 2.0 | - | |
Display Features | Always-on display, Reading mode, Colour temperature adjustment, night mode, Wide Colour Gamut (WCG) | Edge-to-Edge screen | |
Display Protection (Screen Protector) | Fingerprint-resistant coating, Corning Gorilla Glass 6 (scratch resistant glass), oil protective coating | - |
PROCESSOR | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Processor Type (CPU) | Qualcomm Snapdragon 855 | - | |
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Clock Speed | 2.84 GHz | 2.2 GHz | Xiaomi MI 9 has higher clock speed than Samsung Galaxy A51 5G. |
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 640 | - |
MEMORY | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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RAM | LPDDR4X SDRAM - 6 GB | 6 GB | Both phones have the same RAM size. |
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Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | Samsung Galaxy A51 5G has more internal memory than Xiaomi MI 9. |
User Memory | - | 105.3 GB | |
Supported Flash Memory Cards (Expandable Memory) | - | microSDHC, microSDXC - up to 1 TB |
CAMERA | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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MAIN CAMERA |
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Number of Main Cameras | 3 | 4 | |
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Sensor Resolution | 48 Megapixel | 48 Megapixel | Both phones have the same camera resolution. |
Sensor Name | Sony Exmor RS IMX586 sensor | - | |
Lens Type | Ultra wide-angle lens | - | |
Lens Aperture | F/1.75 | F/2.0 | Xiaomi MI 9 has better lens aperture than Xiaomi MI 9. |
Pixel Size | 0.8 μm | - | |
Focus Adjustment | Automatic | Automatic | |
Laser Auto Focus | Yes | - | |
Optical Zoom | 2x | - | |
Digital Zoom | 10x | 8x | Xiaomi MI 9 has better digital zoom than Samsung Galaxy A51 5G. |
Special Effects | HDR | Bokeh effect | |
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 | |
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 | 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 480 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 | Live Focus, background blur |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 12 Megapixel | 12 Megapixel | Both phones have the same second camera resolution. |
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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 | - | |
Camera Features (2nd Camera) | Macro photography | - |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | 16 Megapixel | 5 Megapixel | Xiaomi MI 9 has higher resolution third camera than Samsung Galaxy A51 5G. |
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Lens Type (3rd Camera) | Ultra wide-angle lens | - | |
Lens Aperture (3rd Camera) | F/2.2 | F/2.4 | Xiaomi MI 9 has better third camera lens aperture than Xiaomi MI 9. |
Pixel Size (3rd Camera) | 1 μm | - | |
Camera Functions (3rd Camera) | - | Macro camera |
FOURTH CAMERA |
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Sensor Resolution (4th Camera) | - | 5 Megapixel | |
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Lens Aperture (4th Camera) | - | F/2.2 | |
Camera Functions (4th Camera) | - | Depth camera |
FRONT CAMERA |
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Number of Front Cameras | 1 | 1 | |
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Sensor Resolution (Front) | 20 Megapixel | 32 Megapixel | Samsung Galaxy A51 5G has better front camera resolution than Xiaomi MI 9. |
Lens Aperture (Front) | F/2.0 | F/2.2 | Xiaomi MI 9 has better front lens aperture than Xiaomi MI 9. |
Pixel Size (Front) | 0.9 μm | - | |
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 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 | - |
BATTERY AND CHARGING | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Battery Capacity (Battery Size) | 3300 mAh | 4500 mAh | Samsung Galaxy A51 5G has larger battery capacity than Xiaomi MI 9. |
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Fast Charging Technology | Qualcomm Quick Charge 4.0+ | - | Xiaomi MI 9 has fast charging technology. |
Wireless Charging Standards | WPC, Qi | - | |
Talk Time | - | 1380 minutes | |
Run Time Details | - | Talk (4G): up to 1380 min Active online usage (LTE): up to 16 hrs Active online usage (Wi-Fi): up to 17 hrs Playback (video): up to 19 hrs Playback (audio): up to 86 hrs |
CELLULAR | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Technology | CDMA2000 1X / GSM / WCDMA (UMTS) / TD-SCDMA | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | 5G | Samsung Galaxy A51 5G has more advanced generation mobile network. |
User Interface | MIUI 10 | - | |
Intelligent Assistant | Google Assistant | Bixby | |
Payment Technology | Android Pay | - | |
Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo |
COMMUNICATIONS | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE, 5G NR FR1 | |
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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 5, Band 8 | |
3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 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 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 20, Band 28, Band 38, Band 40, Band 41 | |
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 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
5G NR Band | - | N41, n78 | |
5G NR Frequency | - | TDD TD 2500, TDD TD 3500 | |
Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac, ANT+ | |
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 | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, apt-X, LDAC, apt-X HD | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | |
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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 | - |
FEATURES | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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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 | |
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Sensors | Accelerometer, ambient light sensor, digital compass, gyro sensor, ultrasonic proximity sensor, linear rotation vector sensor | Accelerometer, ambient light sensor, gyro sensor, hall sensor, geomagnetic sensor | |
Security Devices | Fingerprint reader (under display) | Fingerprint reader (under display) | |
Additional Phone Features | Infrared remote control, MIMO technology, MU-MIMO technology, MI Turbo, GAME Turbo | Fast Charging, Samsung KNOX, Bixby Vision, Bixby Routines, Virtual Proximity Sensing |
OTHERS | Xiaomi MI 9 | Samsung Galaxy A51 5G |
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Included Accessories | Protective cover, SIM card removal tool, USB-C cable, USB-C audio adapter, 18W QC3.0 charger | Power adapter | |
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Compliant Standards | TUV Rheinland Certified Safe Fast-Charge System | - |