[Galaxy S 4 Mini General] Aronuser:
Disclaimer: I'm not liable to any demage to your device, including Knox. The information here is as good as I know, there is no guarantee.

(If you like to provide extra information or have a correction, I'll add it to the OP)

Read this first:

http://xdaforums.com/showthread.php?t=2447832

Additional information:

- How to view if I've Knox enabled or not? Enter download-mode (Power the device off and then press volume down + home + power, then press volume up if the triangle screen appears) If it says Knox 0x1 instead of 0x0, you tripped knox

- You'll get Knox 0x1 (warranty void) when you flash: custom kernel (which is included in many roms) or custom recovery (Update: [MENTION=837129]gladson1976[/MENTION] claimed a custom recovery didn't trip Knox at him. But at me it did)

- The device will be functional as before, nothing changes, all apps work etc. (Just at booting recovery or system it says "Set warranty bit, custom recovery" and "Set warranty bit, custom kernel" (depending on if you use a custom kernel or recovery)) info provided by [MENTION=4196760]rpgdev[/MENTION] (It's been said though, that Knox related app's will stop working.) (Upate: [MENTION=4824575]fburgos[/MENTION] claims that tripping knox caused him signal issues)

Another thing is, that if you've Knox apps still installed, they'll give you a message when giving root rights to apps "there is something wrong with the app", as reported by [MENTION=5418686]Flatric[/MENTION]

If you get warnings about applications doing not permitted actions, delete the following files from system/app, or let SuperSU fix it for you.

KNOXAgent.apk

KNOXStore.apk

ContainerAgent.apk

(Use a root browser app for deleting the files)

(information provided by [MENTION=3044346]arco68[/MENTION] throught [MENTION=2047451]R_a_z_v_a_n[/MENTION] , thanks.

- Can I reverse Knox? So far it's impossible, but maybe one day there is a workaround (Update: workaround for Exynos CPU available, but not s4 mini yet. (see at buttom))

- Will there ever be a workaround? Knox uses and eFuse chip according to [MENTION=3568113]rogier666[/MENTION] so there will be probably no workaround.

- I heard that in Europe your warranty will not be void, even if it's Knox 0x1 (no guarantee) check this thread for germany: http://xdaforums.com/galaxy-s4-mini/general/warranty-knox-warranty-void-behaviour-t2919994

- It's been reported that even flashing a newer stock firmware with Odin could cause Knox active [MENTION=5586757]tinko975[/MENTION] (I assume this happens because of Odin update of the recovery and kernel (Use in phone Samsung updater to stay safe)

- Reflashing the firmware doesn't cause KNOX 0x1 as reported by [MENTION=4378556]Gloris[/MENTION], confirmed by [MENTION=4220942]Bullet92[/MENTION]

- Many rooting method will enable KNOX too, thanks to [MENTION=4762743]afme89[/MENTION] for the info.

Extra:

- People claimed that if you flash a certain rom and remove the custom kernel from it and flash it with odin then it doesn't get Knox (because no custom kernel, no custom recovery.)

Knox workaround news:

[MENTION=5889548]masinj[/MENTION] claimed claimed to has found a workaround for Exynos CPU (Not S4 mini) Further info about this:

How does Knox work? Because Knox is both in the OS (apps) and in the firmware (bootloader) it works in two ways. The OS components prevent attempts to obtain root access and make rooting with these Knox apps a pain in the butt. Fortunately they can be removed. In the firmware component (bootloader), Knox works to prevent the flashing of custom kernels and recoveries. If you flash a custom rom or custom recovery WHILE on the Knox bootloader, your Knox flag will be tripped and your Warranty Bit will go from 0x0 to 0x1. The Knox bootloader cannot be downgraded to, say, the MD4 bootloader because of special protections built into it. If you attempt to downgrade it, your phone will instantly brick. Info provided by [MENTION=2047451]R_a_z_v_a_n[/MENTION] , thanks.

Credits:

XDA developers

Me

[MENTION=5586757]tinko975[/MENTION]

[MENTION=4378556]Gloris[/MENTION]

[MENTION=4220942]Bullet92[/MENTION]

[MENTION=4762743]afme89[/MENTION]

[MENTION=4196760]rpgdev[/MENTION]

[MENTION=5418686]Flatric[/MENTION]

[MENTION=2047451]R_a_z_v_a_n[/MENTION]

[MENTION=3044346]arco68[/MENTION]

[MENTION=5889548]masinj[/MENTION]

[MENTION=837129]gladson1976[/MENTION]

[MENTION=4824575]fburgos[/MENTION]

[MENTION=3568113]rogier666[/MENTION]