On this page, you will find the official Koolmex J4 2018 Firmware ROM (Flash File). The Firmware (Flash File) Package comes as a zip file and it contains the How-to Flash Guide, USB Driver, Flash Tool, and Flash File (ROM).
Koolmex J4 2018 Stock Firmware (Flash File ROM)
Firmware Name: Koolmex_J4_2018_MT6580_20180713_5.1.zip
Firmware Size: 492 MB
How to Flash: Follow Guidelines
How to Flash Koolmex J4 2018 Firmware
Step 1: Download and Extract the Koolmex J4 2018 Stock Firmware on your Computer.
Step 2: Once you have extracted the zip package on your computer, you will be able to see the How to Flash Guide, USB Driver, Flash Tool and Flash File (ROM).
Step 3: Now, install the provided USB Driver on your Computer.
Step 4: Once you have successfully installed the USB Driver on your Computer, Launch the Flash Tool on the computer.
Step 5: Once Flash Tool is launched, Load the Flash File (Firmware) in the Flash Tool.
Step 6: Now, Connect your Device to the Computer using the USB Cable.
Step 7: Now, Click on the Download (in flash tool) button to begin the flashing process.
Step 8: Once Flashing process is completed, Disconnect your Koolmex J4 2018 device from the computer and restart it.
[*] Backup: Before using the Flash Tool to Flash the Firmware on your Android Device, we recommend you to take a backup of your personal data, as flashing will permanently delete your personal data from the device.
[*] Caution: On Mediatek powered devices, We do NOT recommend to Flash the Preloader.bin. As it may brick the device, therefore we recommend you to Untick the Preloader while Flashing the firmware.
[*] Original firmware: We only server Original Firmware, which comes with the device or released by the device company. Our each firmware is scanned with Eset AntiVirus before uploading.