Side by side comparison and review of Xiaomi Redmi 9 and Samsung Galaxy A51 5G. Compare sizes, cameras, batteries, memory capacities and other key specifications and features to simplify the choice of your perfect phone. Our goal is to make it easier for you to decide on the phone that will best meet your expectations by revealing the main differences between the products.
| DESIGN AND DIMENSIONS | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | SM-A516B/DS | |
| Form Factor | Touch | Touch | |
| Height | 163.32 mm | 158.9 mm | Xiaomi Redmi 9 has greater height than Samsung Galaxy A51 5G. |
| Width | 77.01 mm | 73.6 mm | Xiaomi Redmi 9 has greater width than Samsung Galaxy A51 5G. |
| Depth | 9.1 mm | 8.7 mm | Samsung Galaxy A51 5G is narrower than Xiaomi Redmi 9. |
| Weight | 198 g | 187 g | Samsung Galaxy A51 5G is lighter than Xiaomi Redmi 9. |
| Body Colour | Carbon grey | Prism cube black | Prism cube white | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.065 W/kg (body), 0.789 W/kg (head), 2.309 W/kg (limb) | 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 |
|
| 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 9 | Samsung Galaxy A51 5G |
|---|
| Display Type | - | OLED display | |
|---|---|---|---|
| Display Technology | - | Infinity-O Super AMOLED | |
| Screen Size (Display Size) | 6.53" | 6.5" | Xiaomi Redmi 9 has larger screen size than Samsung Galaxy A51 5G. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 2400 x 1080 pixels | Samsung Galaxy A51 5G has better screen resolution than Xiaomi Redmi 9. |
| Display Format | Full HD+ | Full HD+ | |
| Pixel Density | 394 ppi | - | |
| Aspect Ratio | 19.5:9 | - | |
| Max Brightness | 400 cd/m² | - | |
| Colour Depth | - | 16.7 million colours | |
| Contrast Ratio | 1500:1 | - | |
| Display Enhancement Technology | Sunlight mode | - | |
| Display Features | Colour temperature adjustment, Dot Drop display, Reading mode 2.0 | Edge-to-Edge screen | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 3 (scratch resistant glass) | - |
| PROCESSOR | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Processor Type (CPU) | MediaTek Helio G80 | - | |
|---|---|---|---|
| Clock Speed | 2 GHz | 2.2 GHz | Samsung Galaxy A51 5G has higher clock speed than Xiaomi Redmi 9. |
| 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) | Mali-G52 MC2 | - |
| MEMORY | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | 6 GB | Samsung Galaxy A51 5G has more RAM than Xiaomi Redmi 9. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 128 GB | Samsung Galaxy A51 5G has more internal memory than Xiaomi Redmi 9. |
| User Memory | - | 105.3 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSDHC, microSDXC - up to 1 TB |
| CAMERA | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 4 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 48 Megapixel | Samsung Galaxy A51 5G has better camera resolution than Xiaomi Redmi 9. |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/2.2 | F/2.0 | Samsung Galaxy A51 5G has better lens aperture than Xiaomi Redmi 9. |
| Field of View (FoV) | 75.2 degree(s) | - | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | - | 8x | |
| Special Effects | HDR, Kaleidoscope | Bokeh effect | |
| Camera Modes | Portrait mode | Slow motion video | |
| Light Source | Flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 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) | - | Live Focus, background blur |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 12 Megapixel | Samsung Galaxy A51 5G has better second camera resolution than Xiaomi Redmi 9. |
|---|---|---|---|
| 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. |
| Field of View (2nd Camera) | 118 degree(s) | 123 degree(s) | Samsung Galaxy A51 5G has larger second camera lens field of view than Xiaomi Redmi 9. |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 5 Megapixel | 5 Megapixel | Both phones have the same third camera resolution. |
|---|---|---|---|
| Lens Aperture (3rd Camera) | F/2.4 | F/2.4 | Both phones have the same lens aperture of the third camera. |
| Camera Functions (3rd Camera) | Macro camera | Macro camera |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 2 Megapixel | 5 Megapixel | Samsung Galaxy A51 5G has higher resolution fourth camera than Xiaomi Redmi 9. |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.2 | |
| Camera Functions (4th Camera) | Depth camera | Depth camera |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 8 Megapixel | 32 Megapixel | Samsung Galaxy A51 5G has better front camera resolution than Xiaomi Redmi 9. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | Xiaomi Redmi 9 has better front lens aperture than Xiaomi Redmi 9. |
| Field of View (Front) | 77.8 degree(s) | - | |
| Focus Adjustment | Focus free | Focus free | |
| Special Effects (Front) | HDR | - | |
| Camera Modes (Front) | Portrait mode | - | |
| Light Source (Front) | Display flash | - | |
| Camera Features (Front) | Self-timer, Palm shutter | - |
| BATTERY AND CHARGING | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Battery Capacity (Battery Size) | 5020 mAh | 4500 mAh | Xiaomi Redmi 9 has larger battery capacity than Samsung Galaxy A51 5G. |
|---|---|---|---|
| Talk Time | 1860 minutes | 1380 minutes | Xiaomi Redmi 9 has longer battery life when making calls than Samsung Galaxy A51 5G. |
| Run Time Details | Talk: up to 1860 min Continuous navigation: up to 19 hrs Playback (video): up to 19 hrs Playback (Music): up to 185 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 |
| CELLULAR | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | Samsung Galaxy A51 5G has more advanced generation mobile network. |
| Intelligent Assistant | - | Bixby | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, 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 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 802.11b/g/n | IEEE 802.11a/b/g/n/ac, ANT+ | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
| NFC | - | Yes | Samsung Galaxy A51 5G has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Supported Digital Audio Standards | AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), AMR-WB, AMR-NB | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, H.264, ASP, MP4 | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 |
| FEATURES | Xiaomi Redmi 9 | Samsung Galaxy A51 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, distance sensor, infrared (IR) sensor | Accelerometer, ambient light sensor, gyro sensor, hall sensor, geomagnetic sensor | |
| Security Devices | Face recognition, fingerprint reader | Fingerprint reader (under display) | |
| Additional Phone Features | Fast Charging, AI face unlock | Fast Charging, Samsung KNOX, Bixby Vision, Bixby Routines, Virtual Proximity Sensing |
| OTHERS | Xiaomi Redmi 9 | Samsung Galaxy A51 5G |
|---|
| Included Accessories | SIM card removal tool, USB-C cable, TPU case, 10W charger | Power adapter |
|---|
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