Case : Samsung S3 GT-I9300 hang logo problem
This is how Repair Emmc "Brick-Bug" KMVTU Samsung i9300 via Test point,
and write full dump 16GB via UFI-Lite USB3.0 SuperSpeed uSD/eMMC Reader for max speed.
▫ By writing full dump , your emmc will be in "Full on" state,
▫ And by restoring efs, you don't need to repair imei by other tool.
▫ Remove emmc from board,
▫ Make test point,
▫ Update firmware,
▫ Write full dump with ufi lite,
▫ Restore efs,
▫ resolder emmc, assembling the phone, n DONE.
https://www.youtube.com/watch?v=DX4DABgVZH4