Good afternoon, members of the forum!
As far as I understood, with the full COI9 firmware (including the COI9 bootloader), installing the engineering bootloader and rollback to earlier versions of the firmware - is not possible. And if you want root, - Ripe the knox on 0x1 and lose the warranty. Is it true?
UPD - the question is closed Fromsvoboda 120 :
The feature of the latest firmware, the G925FXXU3COI9 is, the bootloader (sboot, bootloader) blocks the return on the firmware version below: G925FXXU2BOFJ or G925FXXU2COH2, any. This is how it does not work with Android 5.1.1 Return to 5.0.2. Considering that the engineering loader from Tamerlane works on the firmware earlier than the last one, the new firmware needed to flash its own bootloader and replacing the bootloader from earlier versions. There, the truth is necessary to change the checksum, pack, but in any case you would have a new, fully working firmware with an old loader, which is necessary only for flashing. Having a firmware with an old bootloader, we would have the ability to flash the engineering bootloader, which gave you Tamerlan and at the same time the counter will not work. On the fact you have a bootloader already new and opposition from the engineering bootloader of Tamerlane he has no. In a word, you have two ways: what time do you like with the drain and hope that someone will find a way to get around the counter or score on it and get root in the usual way.
Post has been editedalexremn - 20.10.15, 16:52