My hocus pocus with S4 clone named GT-i9500 ended in soft brick.
Unfortunately, before my testing, what this clone can handle, I didn't checked net, that exist correct stock rom for my model.
Luckily, I made a MTK droid backup.
Unluckily, I can't download whole backup back into the phone. I mean, I can flash basic files to phone, but not system files. I can enter 3e recovery and that's all.
System files, was backed up (by MTK droid tools) into system directory which have about 400MB. So I don't know, why system.ubifs.img file(created also MTK droid tools) has only 2MB.
This is probably reason, why phone won't start. I suspect, that it is by fake free space showed in storage menu...But it's only speculation.
So my question is, if is here any android specialist, which can recompile my system folder into system.img file, which I can flash via flashtool.
That skill is beyond my ability.
My backup is here: