Walton Primo D4 Spicification :
Walton Primo D4 Android operating system Jelly Bean 4.2.2, 1 GHz Dual Core Processor, 256 MB RAM, 512 MB ROM, 2 MP Camera with flash, 1500 mAh battery, External Memory: Support Micro SD card, up to 32GB, Dual Sim card dual standby, Network parameters, Screen size: 3.5-inch HVGA, Resolution: 320×480 (HVGA) pixels, Connectivity : WLAN b/g/n (Wi-Fi), WLAN Hotspot, Bluetooth, Micro USB, Sensors: Motion Sensors: Accelerometer (3D), Network : UMTS + GSM, Band: GSM 850/900/1800/1900MHz, UMTS 2100 MHz, Network speed: GPRS / EDGE/ 3G / HSPA+
Walton D4 Official-firmware
How Flash SP Flash Tools
Unpack FlashTools, and Click on Flash_tool.exe
# Select a the MT6572_Android_scatter_emmc.txt in ROM
# Wait file to be added into Flash Tool
# choose Option->USB Model,click USB Model
# Choose Option->DA DownLoad All->Speed->High Speed, click High Speed
# Turn off your phone, remove the battery.
# “Press F9 (hit Download button)” OR ” if upgrade ROM Firmware->Upgrade ”
# and connect your phone into the computer via USB data cable.
# The process will start and a red progress bar will appear after color purple, yellow.
# And green circles display
– Finish !