Originally Posted by killeril

Is it wipes away 2nd bootloader?
or simply boots amazon OS after flashing (with TWRP if you press volume) ? Tnx alot!

It will not have any affect on the second bootloader. It`s simply rooted stock you will have to add Playstore or other tweaks.

I have rooted 8.4.3 stock and intend to stay that way for now. I'd like a way to backup/restore in case I get stuck in a bootloop or want to revert from an OTA.

Will this basic ADB backup/restore method work on stock KF HD 8.9?

Backup

adb shell su -c "dd if=/dev/block/mmcblk0boot0 of=/sdcard/boot0block.img"
adb shell su -c "dd if=/dev/block/platform/omap/omap_hsmmc.1/by-name/boot of=/sdcard/stock-boot.img"
adb shell su -c "dd if=/dev/block/platform/omap/omap_hsmmc.1/by-name/recovery of=/sdcard/stock-recovery.img"
adb shell su -c "dd if=/dev/block/platform/omap/omap_hsmmc.1/by-name/system of=/sdcard/stock-system.img"

Restore

fastboot -i 0x1949 flash boot stock-boot.img
fastboot -i 0x1949 flash recovery stock-recovery.img
fastboot -i 0x1949 flash system stock-system.img
fastboot -i 0x1949 reboot

Hi guys, I'm sorry to hear some are having problems on the new 8.4.3 software.

I'm on vacation till the weekend and then I can run back through the install to see what's not working.

Sent from my XT926 using Tapatalk 2

So far we have only heard of one permanent brick but I think there have been a few soft bricks. Thank you Hashcode enjoy your vacation.