I even tried flashing recovery image only hoping that could help. I've also tried booting to recovery which is also not working(hoping i could find the build number there). To be sure of the exact rom just like u asked about the phone's rom build number is basically not possible for me cus I dont have all these box that will allow one to check the info of a secure boot mediatek phones. Mostly format and download or upgrade option normally fix the issue. From my experience this happens only when one is trying to flash a different firmware version on a mediatek phone. From my experience it's most probably a firmware issue. I asked the person if she did a software upgrade or some kinda security upgrade that failed during the update process. Initially the phone just shows charging sign and keeps restarting. I even tried flashing recovery image only, hoping that could help.

When the format procedure finished, go back to to Download tab Load scatter file of the firmware you wish to flash click Download and reconnect the device. From my experience this happens only when one is trying to flash a different firmware version on a mediatek phone. Fixing PMT Changed for the rom In SP Flash Tool interface, click Format tab Select Format whole flash except Bootloader click Start and reconnect the device.

Pmt changed for the rom