I switched from a i9505 to a i9506 recently and first started with Rooting the device and installing CWM on it according to the instructions on this page:
Thereafter, i successfully installed solk2's CynogenMod 11.0 rom and was enjoying for about 2 days until i switched off the device to charge. Prior to this I had swtiched it off many times and it restarted ok. Upon restarting, the phone would boot loop at the part where it showed the CynogenMod logo.
Thinking it was a rom issue, I next tried Buda's SPL rom and the same issue happened. I enjoyed the rom for about 2 days after which it would boot loop always after shutting down and restarting the device.
I managed to enter recovery and reboot to bootloader and this was what I got from the screen:
PRODUCT NAME: GT-I9506
CURRENT BINARY: Custom
SYSTEM STATUS: Custom
KNOX KERNEL LOCK: 0x0
KNOX WARRANTY VOID: 0X1
QUALCOMM SECUREBOOT: ENABLE
RP SWREV: S1, T1, R1, A1, P1
WRITE PROTECTION: Enable
What could be the problem? Could KNOX be behind all these? But how could KNOX still exist on a custom rom?