In depth comparison and review of Xiaomi MI 9 SE and Samsung Galaxy A51. 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 SE | Samsung Galaxy A51 |
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Product Type | Smartphone | Smartphone | |
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Manufacturer Model Number | - | SM-A515F/DSN | |
Form Factor | Touch | Touch | |
Height | 147.5 mm | 158.5 mm | Samsung Galaxy A51 has greater height than Xiaomi MI 9 SE. |
Width | 70.5 mm | 73.6 mm | Samsung Galaxy A51 has greater width than Xiaomi MI 9 SE. |
Depth | 7.45 mm | 7.9 mm | Xiaomi MI 9 SE is narrower than Xiaomi MI 9 SE. |
Weight | 155 g | 172 g | Xiaomi MI 9 SE is lighter than Xiaomi MI 9 SE. |
Body Colour | Ocean blue | Piano black | Silver | Prism crush black | Haze crush silver | Prism crush blue | Prism crush white | |
Body Material | Glass | - | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 1.385 W/kg (body), 1.385 W/kg (head) | 0.369 W/kg (head), 1.59 W/kg (body), 2.93 W/kg (limb) | |
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 |
DISPLAY | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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Display Type | OLED display | OLED display | |
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Display Technology | AMOLED | Super AMOLED | |
Screen Size (Display Size) | 5.97" | 6.5" | Samsung Galaxy A51 has larger screen size than Xiaomi MI 9 SE. |
Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2400 x 1080 pixels | Samsung Galaxy A51 has better screen resolution than Xiaomi MI 9 SE. |
Display Format | Full HD+ | Full HD+ | |
Pixel Density | 432 ppi | 408 ppi | Xiaomi MI 9 SE has better pixel density than Samsung Galaxy A51. |
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 | Edge-to-Edge screen, Infinity O display | |
Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass), fingerprint-resistant coating, oil protective coating | - |
PROCESSOR | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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Processor Type (CPU) | Qualcomm Snapdragon 712 | Samsung Exynos 9611 | |
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Clock Speed | 2.3 GHz | 2.3 GHz | Both phones have the same clock speed. |
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 616 | - |
MEMORY | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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RAM | LPDDR4X SDRAM - 6 GB | 4 GB | Xiaomi MI 9 SE has more RAM than Samsung Galaxy A51. |
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Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | Samsung Galaxy A51 has more internal memory than Xiaomi MI 9 SE. |
User Memory | - | 107 GB | |
Supported Flash Memory Cards (Expandable Memory) | - | microSDHC, microSDXC - up to 512 GB |
CAMERA | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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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 | Wide-angle lens | - | |
Lens Aperture | F/1.75 | F/2.0 | Xiaomi MI 9 SE has better lens aperture than Xiaomi MI 9 SE. |
Focus Adjustment | Automatic | Automatic | |
Laser Auto Focus | Yes | - | |
Optical Zoom | 2x | - | |
Digital Zoom | 10x | 8x | Xiaomi MI 9 SE has better digital zoom than Samsung Galaxy A51. |
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 mode, Live Focus mode | |
Face Recognition (Face ID) | Face recognition | - | Xiaomi MI 9 SE has face detection. |
Light Source | Dual flash | LED flash | |
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, 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 | |
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 | AR sticker, background blur, Scene Optimiser, Eye blink, Flaw detection, Stamp, Facial blur |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 13 Megapixel | 12 Megapixel | Xiaomi MI 9 SE has better second camera resolution than Samsung Galaxy A51. |
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Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
Lens Aperture (2nd Camera) | F/2.4 | F/2.2 | Samsung Galaxy A51 has better second camera lens aperture than Xiaomi MI 9 SE. |
Field of View (2nd Camera) | 123 degree(s) | 123 degree(s) | Both phones have the same second camera lens field of view. |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | 8 Megapixel | 5 Megapixel | Xiaomi MI 9 SE has higher resolution third camera than Samsung Galaxy A51. |
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Lens Type (3rd Camera) | Telephoto lens | - | |
Lens Aperture (3rd Camera) | F/2.4 | F/2.4 | Both phones have the same lens aperture of the third camera. |
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 Type (4th Camera) | - | Telephoto lens | |
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 has better front camera resolution than Xiaomi MI 9 SE. |
Lens Aperture (Front) | - | F/2.2 | |
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. |
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 SE | Samsung Galaxy A51 |
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Battery Capacity (Battery Size) | 3070 mAh | 4000 mAh | Samsung Galaxy A51 has larger battery capacity than Xiaomi MI 9 SE. |
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Fast Charging Technology | Qualcomm Quick Charge 4.0+ | - | Xiaomi MI 9 SE has fast charging technology. |
Talk Time | - | 1920 minutes | |
Run Time Details | - | Active online usage (LTE): up to 15 hrs Active online usage (Wi-Fi): up to 16 hrs Playback (video): up to 20 hrs Playback (audio): up to 87 hrs Talk (4G): up to 1920 min |
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Battery Technology | - | Lithium Ion |
CELLULAR | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
Operating System | - | Android 10 | |
User Interface | MIUI 10 | One UI | |
Intelligent Assistant | Google Assistant | Bixby | |
Payment Technology | Google Pay | - | |
Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo |
COMMUNICATIONS | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | |
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2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 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 20, Band 28, Band 38, Band 40 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 20, Band 26, Band 28, Band 38, 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 800 DD, FDD 700 APT, TDD 2600, 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 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac, ANT+ | |
Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 LE | |
Bluetooth Profiles | - | HFP, HSP, OPP, PAN, A2DP, AVRCP, HID, SAP, PBAP, MAP, HOGP | |
NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
Messaging Services | SMS, MMS | SMS, MMS |
MEDIA | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, eAAC+, APE (Monkey's Audio), apt-X, LDAC, AMR-WB, AMR-NB, M4V, 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, H.265, MP4 | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | |
Sound Enhancements | Qualcomm TrueWireless Stereo Plus | - |
FEATURES | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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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, proximity 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, Game Booster, Bixby Routines |
OTHERS | Xiaomi MI 9 SE | Samsung Galaxy A51 |
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Included Accessories | Protective cover, power adapter, SIM card removal tool, USB-C cable, USB-C to 3.5 jack audio cable | Power adapter | |
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Compliant Standards | TUV Rheinland Certified Safe Fast-Charge System | - |