Walton Primo EF4 - Technical characteristics and specifications

Primo EF4 technical characteristics

About the device:

Walton Primo EF4 is a mobile/cell phone with dimensions of 73.28 mm (millimeters), 7.33 cm (centimeters), 0.24 ft (feet), 2.89 in (inches), and a screen resolution of 480 x 854 pixels.

It has a processor ARM Cortex-A7, a graphics card ARM Mali-400 MP and an internal memory of 8 GB (gigabytes) expandable by memory card microSD, microSDHC, microSDXC .

The Walton Primo EF4 comes from the factory with the Android 6.0 Marshmallow operating system.

Technical information

Property	Value
Brand	Walton
Model	Primo EF4

Connectivity
2G connectivity	GSM 850 MHz, GSM 900 MHz, GSM 1800 MHz, GSM 1900 MHz
3G connectivity	W-CDMA 2100 MHz
4G connectivity	LTE 850 MHz, LTE 1800 MHz, LTE-TDD 2300 MHz (B40)
5G connectivity	No

Body
Dimensions	73.28 mm (millimeters), 7.33 cm (centimeters), 0.24 ft (feet), 2.89 in (inches)
Height	145.09 mm (millimeters), 14.51 cm (centimeters), 0.48 ft (feet), 5.71 in (inches)
Thickness	10.35 mm (millimeters), 1.04 cm (centimeters), 0.03 ft (feet), 0.41 in (inches)
Volume	110.04 cm
SIM	Micro-SIM (3FF - third form factor, since 2003, 15.00 x 12.00 x 0.76 mm)
Number of SIMS	2
Colors	Black, White
Body materials	Plastic
Certifications	IP68 (See other devices with IP68)

Screen
Type of screen	TFT
Screen resolution	480 x 854 pixels
Display width	2.45 in (inches), 62.23 mm (millimeters), 6.22 cm (centimeters)
Display height	4.36 in (inches), 110.71 mm (millimeters), 11.07 cm (centimeters)
Aspect ratio	1.779:1
Pixel density	196 ppi (pixels per inch), 77 ppcm (pixels per centimeter)
Color depth	24 bit, 16777216 colors
Display area	65 % (percent)
Crystal	Corning Gorilla Glass 2

Platform
OS	Android 6.0 Marshmallow
CPU	ARM Cortex-A7
SoC	Spreadtrum SC7731G
Technology	28 nm (nanometers)
Bits	32 bit
Instruction set	ARMv7
Cores	32 KB + 32 KB (kilobytes)
CPU Frequency	512 KB (kilobytes), 0.5 MB (megabytes)
GPU	ARM Mali-400 MP

Storage and memory
Memory card	microSD, microSDHC, microSDXC
Internal memory	8 GB (gigabytes)
RAM type	2
RAM channels	400 MHz (megahertz)
RAM frequency	512 MB (megabytes)

Cameras
Sensor model	CMOS BSI (backside illumination)
Sensor type	LED
Sensor size	2592 x 1944 pixels, 5.04 MP (megapixels)
Sensor Pixel size	1280 x 720 pixels, 0.92 MP (megapixels)
Aperture	Autofocus, Continuous shooting, Digital zoom, Geotagging, Panorama, HDR, Touch focus, Face detection, White balance settings, ISO settings, Exposure compensation, Self-timer, Scene mode
Resolution	Phase detection, Sapphire crystal glass lens cover
Video Resolution	5-element lens, Blue filter glass
FPS	Autofocus, Continuous shooting, Digital zoom, Geotagging, Panorama, HDR, Touch focus, Face detection, White balance settings, ISO settings, Exposure compensation, Self-timer, Scene mode
Video features	Phase detection, Interpolated resolution - 16 MP, Secondary rear camera - 5 MP
Aperture secondary camera	CMOS BSI (backside illumination)
Resolution secondary camera	640 x 480 pixels, 0.31 MP (megapixels)
Video resolution secondary camera	30 fps (frames per second)
FPS video secondary camera	30 fps (frames per second)
Audio connector	Yes

Communications
WLAN	802.11b (IEEE 802.11b-1999), 802.11g (IEEE 802.11g-2003), 802.11n (IEEE 802.11n-2009), Wi-Fi Hotspot
Bluetooth	4.0
GPS	GPS, A-GPS
Radio	Yes
USB	Micro USB
Sensors	Accelerometer