Good evening to the King of Mediatek devices and his court. Your subject is a Wiko u307 powered by a MTK 6739 cpu running Android 9. I had planned to flash a PixelDust arm64 A only GSI onto the unit and unfortunately, the flash failed because the image was thought to be corrupted. As a result, I am left with a unit having no System because it was erased. Fortunately, I created two (2) backups using WWR, one of which is clean FW and the other a full FW simply cut apart into 42 partitions. I've tried flashing other GSI's but, every time that I do, an error having a corrupt file arises which, seems to be the norm on third party ADB apps of ANY type. I was wondering what would be the easiest way to mount System back into place. I hoped to use SP Flash to flash just the System partition in Download Only mode but, the PMT changed for the ROM, forcing me to Format,which I refuse to do with only one partition missing. Since Fastboot will not work, how do I flash just System by itself using SP Flash Tool ? There must be a trick to accomplish this. Your skillset would be most appreciated. Get back to me at your convenience. Thanks again.