joy Hello,
You can start learn by reviewing my youtube channel here. I made some video about the procedures for use UFI Box.
And yes, backup 512MiB of user area is commonly enough to save important partitions for revive the most phones.
bigbag Unfortunately I don't have ISP pinout for this device.
If you got ISP, you can easy revive this device via factory image in UFI eMMC ToolBox.
Because entire disk is format, so your imei data partitions is also erased, to recover imei and callibrations data, you can use official vivo split firmware, and pick rawprogram_unparse.xml with dummy modemst and default fsg image.
