Detailed comparison and review of Xiaomi Redmi S2 and Samsung Galaxy A9 (2018). 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 S2 | Samsung Galaxy A9 (2018) |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | SM-A920F/DS | |
| Form Factor | Touch | Touch | |
| Height | 160.73 mm | 162.5 mm | Samsung Galaxy A9 (2018) has greater height than Xiaomi Redmi S2. |
| Width | 77.26 mm | 77 mm | Xiaomi Redmi S2 has greater width than Samsung Galaxy A9 (2018). |
| Depth | 8.1 mm | 7.8 mm | Samsung Galaxy A9 (2018) is narrower than Xiaomi Redmi S2. |
| Weight | 170 g | 183 g | Xiaomi Redmi S2 is lighter than Xiaomi Redmi S2. |
| Body Colour | Grey | Blue | Rose gold | Gold | Black | Dark grey | Lemonade blue | Caviar black | Bubblegum pink | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.577 W/kg (body), 0.429 W/kg (head) | 1.587 W/kg (body), 0.351 W/kg (head) | |
| Connector Type | Micro-USB - 5 pin Micro-USB Type B Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Single-SIM |
| DISPLAY | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | - | Super AMOLED | |
| Screen Size (Display Size) | 5.99" | 6.3" | Samsung Galaxy A9 (2018) has larger screen size than Xiaomi Redmi S2. |
| Screen Resolution (Display Resolution) | 1440 x 720 pixels | 2220 x 1080 pixels | Samsung Galaxy A9 (2018) has better screen resolution than Xiaomi Redmi S2. |
| Display Format | HD+ | Full HD+ | |
| Pixel Density | 269 ppi | - | |
| Aspect Ratio | 18:9 | - | |
| Max Brightness | 450 cd/m² | - | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Contrast Ratio | 1000:1 | - | |
| Display Features | Night Display, Sunlight Display, Reading mode, Colour temperature adjustment | Always-on display |
| PROCESSOR | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 660 | |
|---|---|---|---|
| Clock Speed | - | 2.2 GHz | |
| 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 506 | - |
| MEMORY | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| RAM | 3 GB | 6 GB | Samsung Galaxy A9 (2018) has more RAM than Xiaomi Redmi S2. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 128 GB | Samsung Galaxy A9 (2018) has more internal memory than Xiaomi Redmi S2. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | microSDHC, microSDXC - up to 512 GB |
| CAMERA | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 24 Megapixel | Samsung Galaxy A9 (2018) has better camera resolution than Xiaomi Redmi S2. |
| Lens Aperture | F/2.2 | F/1.7 | Samsung Galaxy A9 (2018) has better lens aperture than Xiaomi Redmi S2. |
| Focus Adjustment | Automatic | Automatic | |
| Special Effects | HDR, low light enhancement | - | |
| Camera Modes | Panorama, portrait mode, AI portrait mode | - | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi Redmi S2 has face detection. |
| Light Source | LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | - | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), AI Dual camera | - |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 5 Megapixel | 8 Megapixel | Samsung Galaxy A9 (2018) has better second camera resolution than Xiaomi Redmi S2. |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.4 |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 10 Megapixel | |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Optical Zoom | - | 2x |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 5 Megapixel | |
|---|---|---|---|
| Lens Aperture (4th Camera) | - | F/2.2 |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 16 Megapixel | 24 Megapixel | Samsung Galaxy A9 (2018) has better front camera resolution than Xiaomi Redmi S2. |
| Lens Type (Front) | Wide-angle lens | - | |
| Lens Aperture (Front) | F/2.0 | F/2.0 | Both phones have the same front camera lens aperture. |
| Special Effects (Front) | Precise bokeh effect, AI Beautify 4.0 | - | |
| HDR Mode (Front) | Auto HDR mode | - | |
| Camera Modes (Front) | Wide selfie mode | - | |
| Light Source (Front) | LED flash | - |
| BATTERY AND CHARGING | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Battery Capacity (Battery Size) | 3080 mAh | 3800 mAh | Samsung Galaxy A9 (2018) has larger battery capacity than Xiaomi Redmi S2. |
|---|
| CELLULAR | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | - | Android 8.0 Oreo | |
| User Interface | MIUI 9 | - | |
| Intelligent Assistant | - | Bixby | |
| Payment Technology | - | Samsung Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, TDD-LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE | |
|---|---|---|---|
| 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 5, Band 8 | - | |
| 3G UMTS Frequency | 2100, 1900, 850, 900 | - | |
| 4G LTE Band | Band 1, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 38, Band 40 | - | |
| 4G LTE Frequency | FDD 2100, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, TDD 2600, TDD 2300 | - | |
| Wireless Interface | Infrared (IrDA), IEEE 802.11b/g/n | IEEE 802.11a/b/g/n/ac, ANT+/ANT | |
| Bluetooth | Bluetooth 4.2 | Bluetooth 5.0 | |
| NFC | - | Yes | Samsung Galaxy A9 (2018) has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Supported Digital Audio Standards | WAV, AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), DSD, 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 | VC-1, XviD, MPEG-4, H.264, M4V, HEVC, H.265, ASP | MKV, FLV, AVI, MPEG-4, WMV, ASF, 3GP, M4V, WebM, 3G2 |
| FEATURES | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| 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, proximity sensor, digital compass, gyro sensor | Accelerometer, proximity sensor, gyro sensor, hall sensor, RGB sensor, geomagnetic sensor | |
| Security Devices | Face recognition, fingerprint reader | Face recognition, fingerprint reader | |
| Additional Phone Features | Infrared remote control, Dual microphones | MIMO technology, Bixby Vision |
| OTHERS | Xiaomi Redmi S2 | Samsung Galaxy A9 (2018) |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool, clear soft case | Power adapter |
|---|
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