to flash the proline xv-502 please follow the instructions below
first of all you will need a computer, usb cable and some files downloaded to your computer.
download your firmware/rom here
download the SP Flash tool here
download therVcom drivers here
now that you have downloaded all the needed files, go to the website where you downloaded the vcom driver and follow the given instructions on how to install the driver.
Use winrar to extract the downloaded files out of the zip folders, extract them to your desktop.
now open the sp flash tool folder and double click the file named "flash_tool" to run the flash tool.
now click the "scatter loading" button on your top right and navigate to the extracted firmware folder and double click the file that you see.
NB: UNCHECK PRELOADER!!!!!!!
Switch off your phone, you can just remove the battery from the phone and put it back again to quickly switch the phone off.
Click download and connect your phone to the computer using a usb cable.
A red line will load followed by a yellow line, the a big green tick to tell you that it is done.