MTK Android ROM upgrade using SP Flash Tool

Immediately following ways Using MTK Android ROM upgrade

What is needed:

USB data cable
MediaTek USB VCOM driver
SP Flash Tool (latest version SP_Flash_Tool_v3.1224.01)

First of all, make sure that you have a DA MediaTek USB VCOM driver is installed.

Whole ROM flashing
First, open the SP Flash Tool and click the scatter-scatter load to load the correct file
(MT6575_Android_scatter_emmc.txt or MT6577_Android_scatter_emmc.txt, depending on which phone you have) to your device and ignoring any messages that may appear.

Turn off your phone, remove the battery and replace it after a few seconds (and do not turn on the phone).

Press F9 (or pressing the Download button) and connect your phone to a computer via a USB data cable.
This process will start and a progress bar will appear red.

After the red progress bar is completed, a progress bar will appear purple.


Right after the purple progress bar is finished, a message at the bottom:
"Please insert the USB cable x seconds" and then the download will start immediately (you will see a yellow progress bar fills).

When the yellow bar is complete, you will get a popup with a green circle and Download OK message,
which means that the process has been stopped.

You can now safely disconnect your phone and turn it on. This process ends here.

Flashing only part of the ROM
In case you want to flash only one part of the ROM, which is also possible. In the example shown, only the recovery image will be flashed.

Uncheck all sections except the one (s) you want to flash and then press F9 (or press the Download button).
This tool will instantly show you a warning because not all parts are selected, but you have to continue anyway. Safe tap Yes to continue.

Download images selected partition will start and after the finish yellow bar, a popup will appear with a green circle.

Please note that, although it is not mandatory to select it in the list of images to flash,

Preloader file must be present in the same folder with the other partition (s) that you want to flash, or the phone will not be able to get into download mode.