Originally Posted by chouayb
Brothers, Distinguished Can I undo the updated Galaxy of Kit Kat to Android 4.3, note that my phone is Galaxy S 4 GT I9505.
Thank you very much for your interaction with my problem.
First of all, love your post!
Do you know if you have the Knox bootloader? You can check by booting into download mode, if there is a line with Knox void 0x0, then you will do and unfortunately you can't download using official firmware.
If you root/flash custom recovery you can downgrade using custom ROMs but you will void the knox warranty.
Are you experiencing problems or having any particular issues with 4.3? Why do you want to downgrade?