I've flashed the wrong firmware so I guess I've hard bricked my phone since It doesn't turn on. Do you think I might be able to get into Download mode if I use a JIG usb like anyone has ever tried it out with a S4 mini?
JIG wont work for u. U need to get Jtag service done, to make ur phone alive.
Search for google and even on XDA about it.
I have unbricked a S3 with a jig usb and it was hard bricked so I don't know IT might work