Manufacturer and Model

Manufacturer
Lenovo
Xiaomi
Phone model
A390
Redmi 4X 16Gb
Year of release
2013
2017

Appearance

Case type
Monoblock
Monoblock
Body length
125 mm
139 mm
Body width
64 mm
70 mm
Body thickness
10.1 mm
8.7 mm
Weight
131 g
150 g
Volume
80.8 cm³
84.77 cm³
Body materials and finishes
  • Plastic
  • Metal
Colors

Processor (CPU)

Processor model
  • MTK 6577
  • Qualcomm Snapdragon 435 MSM8940
CPU clock speed
1000 MHz
1400 MHz
Number of processor cores
2
8
Level 1 cache (L1)
32 + 32 kB
Level 2 cache (L2)
1024 kB
Processor size
32 bits
64 bits
Instruction set architecture
ARMv7
ARMv8
Manufacturing process
40 nm
28 nm

Graphics Processor (GPU)

GPU
GPU model
  • PoverVR SGX 531
  • Qualcomm Adreno 505
GPU clock speed
522 MHz

Primary storage (RAM)

The amount of RAM
512 MB
2 GB
RAM type
LPDDR3
RAM frequency
800 MHz
Number of RAM channels
1

Internal storage

Built-in memory
  • 4 GB
  • 16 GB

SD card

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

Mainboard

Chipset
  • MediaTek MT6577
  • Qualcomm Snapdragon 435 MSM8940

Operating system

Operating system
Android 4.0
Android 7.0

Battery

Battery capacity
1500
4100
Battery type
Li-Pol
Li-Pol
Removable battery
Charging the battery from USB
Adapter output power
  • 5 V / 2 A
Call duration in GSM networks
14 h
36 h
Standby time in GSM networks
220 h
432 h
Call duration in UMTS (WCDMA) networks
9 h
18 h
Standby time on UMTS (WCDMA) networks
180 h
432 h
Video watching duration
5 h

Screen

Screen diagonal
4 in
5 in
Screen resolution
800 x 480 pixels
1280 x 720 pixels
Resolution formats
  • HD
Pixel density
233 ppi
294 ppi
Screen technology
IPS
IPS
Color depth
24 bit
24 bit
Touch screen
Touch screen type
Capacitive
Capacitive
Aspect ratio
1.667
1.778
2.5D curved screen
Contrast ratio
1000:1
Screen brightness
450 cd/m²
Auto-rotate screen
Ambient light sensor
Proximity sensor

Main photo/video camera

Camera megapixels
5 Mp
13 Mp
Maximum photo resolution
2592 x 1944 pixels
4807 x 2704 pixels
Shooting resolution formats
  • Quad HD
  • Full HD
  • HD
  • Ultra HD
  • Quad HD
  • Full HD
  • HD
The presence of a flash
Flash type
LED
Photomatrix model
Samsung S5K3L8
Photomatrix type
CMOS
Photomatrix size
4.69 x 3.52 mm
Photomatrix pixel size
1.127 μm
Crop factor
7.38
Aperture
f/2
Number of lens elements
5
Shooting settings
Autofocus
Phase detection autofocus
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
Video capability
Maximum video resolution
1280 x 720 pixels
1920 x 1080 pixels
Movie speed
30 fps
Movie settings
Movie settings list
  • White balance
  • Color effects
  • Scene selection mode

Front photo/video camera

Front camera megapixels
5 Mp
Maximum photo resolution
2981 x 1677 pixels
Shooting resolution formats
  • Quad HD
  • Full HD
  • HD
Photomatrix model
OmniVision OV5675
Photomatrix type
CMOS
Photomatrix size
2.98 x 2.21 mm
Photomatrix pixel size
1.151 μm
Crop factor
11.66
Aperture
f/2.2
Front camera video
Maximum video resolution
1280 x 720 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
MP3 ringtones
Polyphonic ringtones
Vibration mode
Speakerphone
Conference call
Speed dial
Video calls
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
VoIP telephony

Mobile communications

Cellular generation
3.5G
4.5G
GSM support
GSM frequencies
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
CDMA support
CDMA frequencies
  • CDMA 800 MHz
CDMA2000 support
UMTS support
UMTS frequencies
  • UMTS 2100 MHz
  • UMTS 850 MHz
  • UMTS 900 MHz
  • UMTS 1900 MHz
  • UMTS 2100 MHz
TD-SCDMA support
TD-SCDMA frequencies
  • TD-SCDMA MHz
  • TD-SCDMA MHz
  • TD-SCDMA MHz
  • TD-SCDMA MHz
LTE support
LTE frequencies
  • LTE 850 MHz
  • LTE 900 MHz
  • LTE 1800 MHz
  • LTE 2100 MHz
  • LTE 2600 MHz
  • LTE-TDD 1900 MHz
  • LTE-TDD 2300 MHz
  • LTE-TDD 2500 MHz
  • LTE-TDD 2600 MHz
TDD LTE support

Internet data transmission standards

LTE standards
  • LTE Cat 4
CDMA2000 standards
  • 1xEV-DO Rev. A
Data transmission standards
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS
  • HSPA+
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS

Wi-Fi

Built-in Wi-Fi
Wi-Fi standards
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 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 Mass Storage support

Bluetooth

Built-in Bluetooth
Bluetooth standard
3.0
4.2
A2DP support
Other Bluetooth profiles
  • HID

Navigation and positioning

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

Radio

Built-in radio receiver
Radio range
87.5 - 108.0
RDS support

Sensors and gauges

Ambient light sensor
Proximity sensor
Accelerometer
Orientation and rotation sensor
Gyroscope
Magnetometer

Connectors and interfaces

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

Images

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

Video

Installed video player
Supported video formats
  • MP4
  • MPEG-4
  • 3GPP
  • H.263
  • H.264
  • WMV
  • MP4
  • MPEG-4
  • MKV
  • AVI
  • 3GPP
  • 3GPP
  • Xvid
  • H.263
  • H.264
  • WMV
Video resolution formats
  • HD
  • Full HD
  • HD
Streaming video
Geo tags

Audio

Installed audio player
Supported audio formats
  • AAC
  • AAC+
  • eAAC+
  • AMR
  • MIDI
  • MP3
  • WMA
  • WAV
  • AAC
  • eAAC+
  • AMR
  • AMR-NB
  • FLAC
  • MIDI
  • MP3
  • OGG
  • WMA
  • WAV
MP3 support
Streaming audio
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
Email
IMAP4 protocol support
Convert text to speech
Convert speech to text

Connectivity and synchronization

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

Software features

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

Installed games
Installed games
  • Diamond
  • Fishing Joy

Receiving and sending SMS

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

Security

Fingerprint scanner
Installed antivirus
Installed VPN

Additional features

Standalone mode (flight mode)

SAR level

SAR level
0.35 W/kg
0.58 W/kg