samsung firmware downgrade

Samsung a500fu, a510f, a300fu, downgrading fw 6.0.1 to 5.x.x tested Downgrade Firmware's that Allow all you to Easy "Unlock, Write Cert itc... and FRP Repair, (with or w/o Box) A300FU_firmware_for_downgrade_from_6.0.1_to_5.0.2 A500FU_OK_for_Downgrade_from_6.0.1_to_5.0.2...