Side by side comparison and review of ASUS ZenFone 3 (ZE520KL) and Xiaomi Redmi S2. 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 | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZE520KL | - | |
| Form Factor | Touch | Touch | |
| Height | 146.87 mm | 160.73 mm | Xiaomi Redmi S2 has greater height than ASUS ZenFone 3 (ZE520KL). |
| Width | 73.98 mm | 77.26 mm | Xiaomi Redmi S2 has greater width than ASUS ZenFone 3 (ZE520KL). |
| Depth | 7.69 mm | 8.1 mm | ASUS ZenFone 3 (ZE520KL) is narrower than ASUS ZenFone 3 (ZE520KL). |
| Weight | 144 g | 170 g | ASUS ZenFone 3 (ZE520KL) is lighter than ASUS ZenFone 3 (ZE520KL). |
| Body Colour | Moon white | Gold shimmer | Black sapphire | Grey | Blue | Rose gold | Gold | Black | Dark grey | |
| Body Material | Metal, glass | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.938 W/kg (body), 0.278 W/kg (head) | 1.577 W/kg (body), 0.429 W/kg (head) | |
| Integrated Components | FM radio | - | |
| Connector Type | Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
Micro-USB - 5 pin Micro-USB Type B Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM (SIM1 and SIM2/MicroSD slots) | Dual-SIM | |
| SIM Card Configuration Details | Nano SIM + nano SIM/microSD | - |
| DISPLAY | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | Super IPS+ | - | |
| Screen Size (Display Size) | 5.2" | 5.99" | Xiaomi Redmi S2 has larger screen size than ASUS ZenFone 3 (ZE520KL). |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 1440 x 720 pixels | ASUS ZenFone 3 (ZE520KL) has better screen resolution than Xiaomi Redmi S2. |
| Display Format | Full HD | HD+ | |
| Pixel Density | - | 269 ppi | |
| Aspect Ratio | - | 18:9 | |
| Max Brightness | 600 cd/m² | 450 cd/m² | ASUS ZenFone 3 (ZE520KL) has better display brightness than Xiaomi Redmi S2. |
| Colour Depth | - | 16.7 million colours | |
| Contrast Ratio | - | 1000:1 | |
| Display Enhancement Technology | Bluelight Filter for Eye Care | - | |
| Display Features | ASUS Glove Touch technology, 2.5D curved glass | Night Display, Sunlight Display, Reading mode, Colour temperature adjustment | |
| Display Protection (Screen Protector) | Fingerprint-resistant oleophobic coating, Corning Gorilla Glass (scratch resistant glass) | - |
| PROCESSOR | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 625 | |
|---|---|---|---|
| Clock Speed | 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 | Qualcomm ADRENO 506 |
| MEMORY | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| RAM | 3 GB | 3 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 32 GB | Both phones have the same internal memory capacity. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 2 TB | microSDHC, microSDXC - up to 256 GB |
| CAMERA | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 2 | |
|---|---|---|---|
| Sensor Resolution | 16 Megapixel | 12 Megapixel | ASUS ZenFone 3 (ZE520KL) has better camera resolution than Xiaomi Redmi S2. |
| Sensor Name | Sony Exmor RS IMX298 sensor | - | |
| Lens Aperture | F/2.0 | F/2.2 | ASUS ZenFone 3 (ZE520KL) has better lens aperture than ASUS ZenFone 3 (ZE520KL). |
| Lens Construction | 6-element | - | |
| Optical Image Stabiliser (OIS) | 4 Stop OIS (Optical Image Stabilisation) | - | ASUS ZenFone 3 (ZE520KL) has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Special Effects | Depth of field | HDR, low light enhancement | |
| HDR Mode | Auto HDR mode | - | |
| Camera Modes | Panorama, Time-lapse mode, night mode, manual mode, Real time beauty mode, super resolution mode, All Smiles mode, Mini mode | Panorama, portrait mode, AI portrait mode | |
| Face Recognition (Face ID) | - | Face recognition | Xiaomi Redmi S2 has face detection. |
| Light Source | Dual LED flash | LED flash | |
| Video Resolutions | 3840 x 2160 (4K) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | |
| Camera Features (Functions) | Sapphire crystal lens cover, GIF animation function, Smart Remove, Electronic Image Stabiliser (EIS), Time Rewind, Largan lens | Phase Detect Auto-Focus (PDAF), AI Dual camera |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 5 Megapixel |
|---|
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 8 Megapixel | 16 Megapixel | Xiaomi Redmi S2 has better front camera resolution than ASUS ZenFone 3 (ZE520KL). |
| 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 | Auto HDR mode | |
| Camera Modes (Front) | Selfie panorama | Wide selfie mode | |
| Light Source (Front) | - | LED flash | |
| Camera Features (Front) | PixelMaster camera | - |
| BATTERY AND CHARGING | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Battery Capacity (Battery Size) | 2650 mAh | 3080 mAh | Xiaomi Redmi S2 has larger battery capacity than ASUS ZenFone 3 (ZE520KL). |
|---|
| CELLULAR | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 6.0 (Marshmallow) | - | |
| User Interface | ASUS ZenUI 3.0 | MIUI 9 | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, DC-HSPA+ | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, TDD-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 2, Band 3, Band 5, Band 7, Band 8, Band 20 | Band 1, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 38, Band 40 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD | 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/ac | Infrared (IrDA), IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 4.2 | Bluetooth 4.2 | |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, PCM, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), DSD, AMR-WB, AMR-NB | |
|---|---|---|---|
| Supported Digital Video Standards | - | VC-1, XviD, MPEG-4, H.264, M4V, HEVC, H.265, ASP |
| FEATURES | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| 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, hall sensor, RGB sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor | |
| Security Devices | Fingerprint reader | Face recognition, fingerprint reader | |
| Additional Phone Features | Infrared remote control, Dual microphones, Hi-Res Audio, Google Drive Storage (100 GB) (free for 2 years), ASUS SonicMaster 3.0 technology, ASUS NoiseZero Talk technology | Infrared remote control, Dual microphones |
| OTHERS | ASUS ZenFone 3 (ZE520KL) | Xiaomi Redmi S2 |
|---|
| Included Accessories | Power adapter | USB cable, power adapter, SIM card removal tool, clear soft case |
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