thanks very much to andu86 for this thread! Followed the simple instructions and successfully rooted S4 mini
My original firmware: I9195XXUCNK1_I9195XEOCNI1_XEO
1. Flashed kernel for I9195XXUCNF7 (from andu86) with Odin
2. ran towelroot & Superuser(note: towelroot initially did not install due to interference from Twilight app)
3. Flashed back to kernel for I9195XXUCNK1 (from andu86)
One small note: after flashing back to new kernel after rooting, System Status was initially listed as Custom - rebooted again and it was listed as Official!?
I guess I lose root if I ever update OTA or if I flash a newer (official) firmware with Odin?
What are the differences between the I9195XXUCNK1 and I9195XXUCNK4 firmwares??
I wonder how the device status "custom" is actually derived from the system and which process is setting this. From observation it could be that any change to the \system partition triggers this - and since getting "root" means to install the "su binary" on system there is no way around the system status "custom" when you are root. Once getting back to all official parts (un-root may not be enough if you did some de-bloating or applied tweaks renaming e.g. some sound files) - the device status is also back to official.
I have observed that Screen sharing (from device to TV) and especially the SmartView app (connecting Samsung TV to your device and have it stream TV to your device) is suffering if your device is not "really" official. As I understand this is linked to enforced encryption on the HDCP interface (due to copyright protection). This is also different for devices. While the screen sharing works on S4 mini (even rooted), it does no more on my Tab 3 8 after rooting. Smart View TV stream reception does not work for any of my rooted devices (also not the Tab 2 7 - which has no screen sharing) - I neither use custom kernel (except Tab 2 7) nor custom ROM.
Knox seems to be triggered once you install anything without valid signature (kernel, system, recovery) and this is not reset even if you revert to that state.
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