Manufacturer and Model

Manufacturer
Doogee
ASUS
Phone model
X20
ZenFone Selfie ZD551KL 16Gb
Year of release
2017
2015

Appearance

Case type
Monoblock
Monoblock
Body length
146 mm
157 mm
Body width
72 mm
77 mm
Body thickness
8.8 mm
10.8 mm
Weight
174 g
170 g
Volume
92.06 cm³
130.48 cm³
Body materials and finishes
  • Plastic
  • Plastic
Colors

Processor (CPU)

Processor model
  • MediaTek MT6580
  • Qualcomm Snapdragon 615 MSM8939
CPU clock speed
1300 MHz
1700 MHz
Number of processor cores
4
8
Level 1 cache (L1)
32 + 32 kB
Level 2 cache (L2)
512 kB
Processor size
32 bits
Instruction set architecture
ARMv7
Manufacturing process
28 nm

Graphics Processor (GPU)

GPU
GPU model
  • ARM Mali-400 MP2
  • Adreno 405
GPU clock speed
500 MHz
Number of GPU cores
2

Primary storage (RAM)

The amount of RAM
2 GB
2 GB
RAM frequency
533 MHz
Number of RAM channels
1

Internal storage

Built-in memory
  • 16 GB
  • 16 GB

SD card

Types of Supported Memory Cards
  • microSDXC
  • microSDHC
  • microSD
  • microSDXC
  • microSDHC
  • microSD
Maximum expandable memory
64 GB
128 GB
Hot swappable memory card

Mainboard

Chipset
  • MediaTek MT6580

Operating system

Operating system
Android 7.0
Android 5.0

Battery

Battery capacity
2580
3000
Battery type
Li-Ion
Li-Pol
Removable battery
Charging the battery from USB
Adapter output power
  • 5 V / 1 A

Screen

Screen diagonal
5 in
5.5 in
Screen resolution
1280 x 720 pixels
1920 x 1080 pixels
Resolution formats
  • HD
  • Full HD
  • HD
Pixel density
294 ppi
401 ppi
Screen technology
IPS
IPS
Color depth
24 bit
24 bit
Touch screen
Touch screen type
Capacitive
Capacitive
Anti-scratch screen
Aspect ratio
1.778
1.778
Contrast ratio
1000:1
Auto-rotate screen
Ambient light sensor
Proximity sensor

Main photo/video camera

Camera megapixels
5 Mp
13 Mp
Maximum photo resolution
2981 x 1677 pixels
4096 x 2304 pixels
Shooting resolution formats
  • Quad HD
  • Full HD
  • HD
  • Ultra HD
  • Quad HD
  • Full HD
  • HD
Dual camera
The presence of a flash
Flash type
LED
Dual LED
Photomatrix type
CMOS
Aperture
f/2.8
Shooting settings
Autofocus
Auto exposure
Face detector
Panoramic photography
HDR photography
Viewfinder
Continuous photography
Touch focus
Exposure compensation
Self-timer
White balance
ISO setting
Scene selection
Other photo settings
  • Serial shooting
  • Panoramic shooting
  • Hdr shooting
  • Face detection
  • Serial shooting
  • Panoramic shooting
  • Hdr shooting
  • Face detection
Video capability
Maximum video resolution
1920 x 1080 pixels
1920 x 1080 pixels
Movie speed
30 fps
30 fps
Movie settings
Movie settings list
  • White balance
  • Color effects
  • Scene selection mode
  • White balance
  • Color effects
  • Hdr
  • Scene selection mode

Front photo/video camera

Front camera megapixels
2 Mp
13 Mp
Maximum photo resolution
1886 x 1061 pixels
4807 x 2704 pixels
Shooting resolution formats
  • Ultra HD
  • Quad HD
  • Full HD
  • HD
Photomatrix type
CMOS
Front camera video
Maximum video resolution
640 x 480 pixels

SIM card and calls

Number of SIM-cards
2
2
Mode of operation of multiple SIM-cards
Alternating
Alternating
SIM card type
Micro-SIM + Nano-SIM
Micro-SIM
MP3 ringtones
Polyphonic ringtones
Vibration mode
Speakerphone
Conference call
Speed dial
Video calls
Second microphone
Noise reduction during a call
Ability to mute the microphone during a call
Extended phone book
Contacts in the phone book
Unlimited
Unlimited
Data exchange between SIM card and internal memory

Mobile communications

Cellular generation
3.5G
4G
GSM support
GSM frequencies
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
UMTS support
UMTS frequencies
  • UMTS 850 MHz
  • UMTS 900 MHz
  • UMTS 2100 MHz
  • UMTS 900 MHz
  • UMTS 2100 MHz
LTE support
LTE-Advanced support

Internet data transmission standards

Data transmission standards
  • HSPA+
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS
  • HSPA+
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS

Wi-Fi

Built-in Wi-Fi
Wi-Fi standards
  • 802.11b
  • 802.11g
  • 802.11n
Wi-Fi Direct support
Wi-Fi hotspot mode

USB

USB connector
USB connector type
Micro USB
Micro USB
USB standard
2.0
2.0
USB host support
USB Mass Storage support

Bluetooth

Built-in Bluetooth
Bluetooth standard
4.0
4.0
A2DP support
Other Bluetooth profiles
  • EDR

Navigation and positioning

Built-in GPS
A-GPS support
Installed GLONASS
Built-in digital compass

Radio

Built-in radio receiver
Radio range
87.5 - 108 МГц
87.5 - 108 МГц

Sensors and gauges

Ambient light sensor
Proximity sensor
Accelerometer
Orientation and rotation sensor
Magnetometer

Connectors and interfaces

USB connector
Micro USB
Micro USB
TRS jack (mini/micro jack)
3.5 mm
3.5 mm

Images

Supported image formats
  • PNG
  • JPEG
  • GIF
  • BMP
  • PNG
  • JPG
  • GIF
  • BMP
Installed image editor
Geo tags

Video

Installed video player
Supported video formats
  • MP4
  • MPEG-4
  • AVI
  • 3GPP
  • 3GPP
  • Xvid
  • WMV
  • MP4
  • AVI
  • 3GPP
  • WMV
Video resolution formats
  • Full HD
  • HD
  • Full HD
  • HD
Streaming video
Geo tags

Audio

Installed audio player
Supported audio formats
  • AAC
  • eAAC+
  • AMR
  • AMR-NB
  • FLAC
  • MIDI
  • MP3
  • OGG
  • WMA
  • WAV
  • AAC
  • MIDI
  • MP3
  • WMA
  • WAV
MP3 support
Streaming audio
Identifier of songs
Dictaphone
Voice notes
TRS jack (mini/micro jack)
3.5 mm
3.5 mm

Control elements

Touch input
Multitouch
Pinch zoom
Russified input

Documents and office

Installed Organizer (PIM)
Office document support
Supported document formats
  • PDF
Email
IMAP4 protocol support
Convert speech to text

Connectivity and synchronization

PC connection
Tethering support
Synchronization over the mobile network
OTA sync
Synchronization with services
  • Gmail
  • Gtalk
  • Facebook
  • Twitter
  • Youtube
  • Google search
  • Google maps
  • Gmail
  • Gtalk
  • Facebook
  • Twitter
  • Youtube
  • Google search
  • Google maps

Software features

Installed browser
  • HTML
  • HTML5
  • CSS3
  • WAP
  • HTML
  • WAP

Receiving and sending SMS

SMS messages
SMS T9 support
SMS output in the form of a chat
MMS support

Security

Installed VPN

Additional features

Standalone mode (flight mode)