Hi ironass,
I Have just bought G900F (second hand) with lollipop 5.0 and it's the g900fxxu1boj1.
The knox is at 0x0 position.
Is it possible to downgrade to Kitkat with root without triggering the knox?
Any guide for this??
thanks in advance.
Hello and welcome to Android Central
kingzback
It is entirely possible to downgrade the international model of Samsung Galaxy S5,
G900F, to KitKat by downloading and flashing the stock firmware for your model of phone, CSC and Product code, by following the instructions and video in
#1.11 of
42 Galaxy S5 models - Dummies Guide.
However, flashing the stock firmware which contains the stock, unrooted, kernel will unroot you and you will need to re-root again by following the instructions in
[SM-G900*] CF-Auto-Root. Unfortunately, rooting will trip the Knox Security flag these days.
By downgrading to
Android 4.4.2 you are missing not only Lollipop but also all the bug fixes and, more importantly, all the security updates that have been included in the latest releases for exploits such as
Stagefright. Also be advised that rooted phones will not receive future updates, such as Marshmallow, via OTA or Samsung Kies/Smart Switch and the firmware update will need to be flashed, ( and re-rooted), as described above.
Alternatively, you could try flashing a custom, rooted ROM for Android 4.4.2 and your model of phone. Seek advice from individual ROM developers if your Android 5.0 bootloader would be compatible with their particular Android 4.4.2 ROM. I am surprised that as you are on a rooted Android 5.0 firmware, that your Knox Security is not already tripped. You can check this by going into Download mode on the S5.
https://www.youtube.com/watch?v=e-uUxe9TFtQ