Detailed comparison and review of Xiaomi Redmi Note 9 Pro 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 Redmi Note 9 Pro | 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 | 165.75 mm | 158.9 mm | Xiaomi Redmi Note 9 Pro has greater height than Samsung Galaxy A51 5G. |
Width | 76.68 mm | 73.6 mm | Xiaomi Redmi Note 9 Pro has greater width than Samsung Galaxy A51 5G. |
Depth | 8.8 mm | 8.7 mm | Samsung Galaxy A51 5G is narrower than Xiaomi Redmi Note 9 Pro. |
Weight | 209 g | 187 g | Samsung Galaxy A51 5G is lighter than Xiaomi Redmi Note 9 Pro. |
Body Colour | Interstellar grey | Tropical green | Prism cube black | Prism cube white | |
Body Material | Curved 3D glass, Gorilla glass 5 | - | |
Protection | Splashproof | - | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 2.07 W/kg (limb), 1.021 W/kg (body), 0.662 W/kg (head) | 1.555 W/kg (body), 0.496 W/kg (head) | |
Integrated Components | Ultra-linear speaker | - | |
Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
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 Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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Display Type | LCD display | OLED display | |
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Display Technology | - | Infinity-O Super AMOLED | |
Screen Size (Display Size) | 6.67" | 6.5" | Xiaomi Redmi Note 9 Pro has larger screen size than Samsung Galaxy A51 5G. |
Screen Resolution (Display Resolution) | 2400 x 1080 pixels | 2400 x 1080 pixels | Both phones have the same screen resolution. |
Display Format | Full HD+ | Full HD+ | |
Max Brightness | 450 cd/m² | - | |
Colour Depth | - | 16.7 million colours | |
Contrast Ratio | 1500:1 | - | |
Display Features | Reading mode 2.0, Dot Display | Edge-to-Edge screen | |
Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | - |
PROCESSOR | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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Processor Type (CPU) | Qualcomm Snapdragon 720G | - | |
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Clock Speed | 2.3 GHz | 2.2 GHz | Xiaomi Redmi Note 9 Pro 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 618 | - |
MEMORY | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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RAM | 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 Redmi Note 9 Pro. |
User Memory | - | 105.3 GB | |
Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 512 GB | microSDHC, microSDXC - up to 1 TB |
CAMERA | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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MAIN CAMERA |
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Number of Main Cameras | 4 | 4 | |
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Sensor Resolution | 64 Megapixel | 48 Megapixel | Xiaomi Redmi Note 9 Pro has better camera resolution than Samsung Galaxy A51 5G. |
Sensor Size | 1/1.72" | - | |
Lens Aperture | F/1.89 | F/2.0 | Xiaomi Redmi Note 9 Pro has better lens aperture than Xiaomi Redmi Note 9 Pro. |
Lens Construction | 6-element | - | |
Field of View (FoV) | 79.8 degree(s) | - | |
Pixel Size | 0.8 μm | - | |
Focus Adjustment | Automatic | Automatic | |
Digital Zoom | - | 8x | |
Special Effects | HDR, Kaleidoscope | Bokeh effect | |
Camera Modes | Burst mode, Panorama, night mode, Smart ultra-wide angle mode, Photo timer, Custom watermark, Documents, Beautify, Levelling, Cinematic portraits | Slow motion video | |
Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9 Pro has face detection. |
Light Source | 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, 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) | 4-in-1 Super Pixel, AI scene detection, Portrait mode with background blurring, Ultra wide-angle edge distortion correction, AI Quad camera, Steady handheld night photography, full screen frame, AI watermark | Live Focus, background blur |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 8 Megapixel | 12 Megapixel | Samsung Galaxy A51 5G has better second camera resolution than Xiaomi Redmi Note 9 Pro. |
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Sensor Size (2nd Camera) | 1/4" | - | |
Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
Lens Element Qty (2nd Camera) | 5-element | - | |
Field of View (2nd Camera) | 119 degree(s) | 123 degree(s) | Samsung Galaxy A51 5G has larger second camera lens field of view than Xiaomi Redmi Note 9 Pro. |
Pixel Size (2nd Camera) | 1.12 μm | - | |
Camera Features (2nd Camera) | 5-piece lens | - |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | 5 Megapixel | 5 Megapixel | Both phones have the same third camera resolution. |
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Sensor Size (3rd Camera) | 1/5" | - | |
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) | 1.12 μm | - | |
Camera Functions (3rd Camera) | Macro camera | Macro camera | |
Camera Features (3rd Camera) | AF (2cm-10cm) | - |
FOURTH CAMERA |
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Sensor Resolution (4th Camera) | 2 Megapixel | 5 Megapixel | Samsung Galaxy A51 5G has higher resolution fourth camera than Xiaomi Redmi Note 9 Pro. |
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Sensor Size (4th Camera) | 1/5" | - | |
Lens Aperture (4th Camera) | F/2.4 | F/2.2 | Samsung Galaxy A51 5G has better fourth camera lens aperture than Xiaomi Redmi Note 9 Pro. |
Pixel Size (4th Camera) | 1.75 μm | - | |
Camera Functions (4th Camera) | Depth camera | Depth camera |
FRONT CAMERA |
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Number of Front Cameras | 1 | 1 | |
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Sensor Resolution (Front) | 16 Megapixel | 32 Megapixel | Samsung Galaxy A51 5G has better front camera resolution than Xiaomi Redmi Note 9 Pro. |
Sensor Size (Front) | 1/3.06" | - | |
Lens Aperture (Front) | F/2.48 | F/2.2 | Samsung Galaxy A51 5G has better front lens aperture than Xiaomi Redmi Note 9 Pro. |
Field of View (Front) | 82.4 degree(s) | - | |
Pixel Size (Front) | 1 μm | - | |
Focus Adjustment | - | Focus free | |
Special Effects (Front) | HDR | - | |
Camera Modes (Front) | Panoramic selfies, AI portrait mode, AI Beautify, Slo-mo Selfie | - | |
Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi Note 9 Pro has face detection. |
Light Source (Front) | Display flash | - | |
Camera Features (Front) | AI scene detection, Palm shutter, AI silhouette detection | - |
BATTERY AND CHARGING | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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Battery Capacity (Battery Size) | 5020 mAh | 4500 mAh | Xiaomi Redmi Note 9 Pro has larger battery capacity than Samsung Galaxy A51 5G. |
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Fast Charging Technology | Qualcomm Quick Charge 4.0 | - | Xiaomi Redmi Note 9 Pro has fast charging technology. |
Talk Time | 1980 minutes | 1380 minutes | Xiaomi Redmi Note 9 Pro has longer battery life when making calls than Samsung Galaxy A51 5G. |
Run Time Details | Talk: up to 1980 min Gaming: up to 13 hrs Playback (Music): up to 147 hrs Navigation: up to 16 hrs |
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 |
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Battery Technology | Lithium Ion | - |
CELLULAR | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | 5G | Samsung Galaxy A51 5G has more advanced generation mobile network. |
Operating System | Android 10 | - | |
User Interface | MIUI 11 | - | |
Intelligent Assistant | - | Bixby | |
Payment Technology | Google Pay | - | |
Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo |
COMMUNICATIONS | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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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, 5G NR FR1 | |
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2G Band | 850 GSM, 900 GSM, 1900 GSM, 2100 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 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 20, Band 28, Band 38, Band 40, Band 41 | 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 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | 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. |
Messaging Services | SMS, MMS | SMS, MMS |
MEDIA | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, APE (Monkey's Audio) | 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, XviD, M4V, MP4 | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | |
Audio Amplifier | Smart PA | - |
FEATURES | Xiaomi Redmi Note 9 Pro | 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, digital compass, gyro sensor, distance sensor, infrared (IR) sensor, In-screen ambient light sensor | Accelerometer, ambient light sensor, gyro sensor, hall sensor, geomagnetic sensor | |
Security Devices | Face recognition, fingerprint reader (side) | Fingerprint reader (under display) | |
Additional Phone Features | Infrared remote control, AI face unlock, Qualcomm 5th generation AI Engine, Z-axis linear vibration motor | Fast Charging, Samsung KNOX, Bixby Vision, Bixby Routines, Virtual Proximity Sensing |
OTHERS | Xiaomi Redmi Note 9 Pro | Samsung Galaxy A51 5G |
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Included Accessories | Protective cover, SIM card removal tool, USB-C cable, 33W charger | Power adapter | |
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Compliant Standards | TUV Rheinland Low Blue Light Certification | - |