In depth comparison and review of ASUS ZenFone Selfie (ZD551KL) and Silent Circle Blackphone 2. 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 | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZD551KL | - | |
| Form Factor | Touch | Touch | |
| Height | 156.5 mm | 152.4 mm | ASUS ZenFone Selfie (ZD551KL) has greater height than Silent Circle Blackphone 2. |
| Width | 77.2 mm | 76.4 mm | ASUS ZenFone Selfie (ZD551KL) has greater width than Silent Circle Blackphone 2. |
| Depth | 10.8 mm | 7.9 mm | Silent Circle Blackphone 2 is narrower than ASUS ZenFone Selfie (ZD551KL). |
| Weight | 170 g | 165 g | Silent Circle Blackphone 2 is lighter than ASUS ZenFone Selfie (ZD551KL). |
| Body Colour | Glacial grey | Pure white | Aqua blue | Chic pink | Black | |
| Body Material | - | Plastic, aluminium-magnesium alloy | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.386 W/kg (body), 0.649 W/kg (head) | - | |
| Connector Type | USB Headset jack - mini-phone 3.5mm |
Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
|
| SIM Card Type (Size) | Micro SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | - |
| DISPLAY | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | IPS | IPS | |
| Screen Size (Display Size) | 5.5" | 5.5" | Both phones have the same screen size. |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 1920 x 1080 pixels | Both phones have the same screen resolution. |
| Display Format | Full HD | Full HD | |
| Pixel Density | 403 ppi | - | |
| Colour Depth | 16.7 million colours | - | |
| Display Protection (Screen Protector) | Fingerprint-resistant oleophobic coating, Corning Gorilla Glass 4 (scratch resistant glass) | Corning Gorilla Glass 3 (scratch resistant glass) |
| PROCESSOR | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 616 | Qualcomm Snapdragon 615 | |
|---|---|---|---|
| Processor Number | - | MSM8939 | |
| Clock Speed | - | 1.7 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 405 |
| MEMORY | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| RAM | 2 GB | 3 GB | Silent Circle Blackphone 2 has more RAM than ASUS ZenFone Selfie (ZD551KL). |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 16 GB | 32 GB | Silent Circle Blackphone 2 has more internal memory than ASUS ZenFone Selfie (ZD551KL). |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSDHC, microSDXC - up to 128 GB |
| CAMERA | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 13 Megapixel | Both phones have the same camera resolution. |
| Sensor Type | - | BSI-CMOS | |
| Lens Aperture | F/2.0 | - | |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| HDR Mode | Super HDR | - | |
| Camera Modes | Beauty mode | - | |
| Face Recognition (Face ID) | Face detection | - | ASUS ZenFone Selfie (ZD551KL) has face detection. |
| Light Source | Dual LED flash | Dual LED flash | |
| Still Image Resolutions | 4128 x 3096 | - | |
| Video Resolutions | 1920 x 1080 (1080p) | - | |
| Camera Features (Functions) | ZenMotion | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 13 Megapixel | 5 Megapixel | ASUS ZenFone Selfie (ZD551KL) has better front camera resolution than Silent Circle Blackphone 2. |
| Lens Type (Front) | Wide-angle lens | - | |
| Lens Aperture (Front) | F/2.2 | - | |
| Focus Adjustment | Automatic | Focus free | |
| Camera Modes (Front) | Panoramic selfies | - | |
| Light Source (Front) | LED flash | - |
| BATTERY AND CHARGING | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Battery Capacity (Battery Size) | 3000 mAh | 3060 mAh | Silent Circle Blackphone 2 has larger battery capacity than ASUS ZenFone Selfie (ZD551KL). |
|---|---|---|---|
| Standby Time | 255 hours | - | |
| Talk Time | 1386 minutes | - | |
| Run Time Details | Talk: up to 1386 min Standby: up to 255 hrs |
- | |
| Battery Technology | Lithium polymer | Lithium polymer |
| CELLULAR | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 5.0 (Lollipop) | - | |
| User Interface | ASUS ZenUI | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | A-GPS, GLONASS |
| COMMUNICATIONS | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, DC-HSPA+ | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20 | Band 2, Band 4, Band 7, Band 17 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD | FDD 1900 PCS, FDD 1700 - 2110 AWS, FDD 2600, FDD 700b | |
| Wireless Interface | IEEE 802.11b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 4.0 | Bluetooth 4.0 | |
| Messaging Services | SMS, MMS | SMS, MMS |
| FEATURES | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Phone Functions | Speakerphone, call timer, conference call, flight mode, vibrating alert | Speakerphone, call timer, conference call, flight mode, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, G-sensor, hall sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass, barometer, gyro sensor, G-sensor | |
| Additional Phone Features | ASUS TruVivid technology | Dual microphones |
| OTHERS | ASUS ZenFone Selfie (ZD551KL) | Silent Circle Blackphone 2 |
|---|
| Included Accessories | Power adapter | Headphones, USB cable, power adapter, SIM card removal tool |
|---|
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