[AT&T Samsung Galaxy S 4 General] scott14719:
I've seen a lot of questions about KNOX during the time of the MJ9 update and there is a lot of mis-information about it. I am going to try to clear a few things up and put some links that might help explain KNOX. I will probably not maintain this thread because it is an informative thread and not really a development thread. Please feel free to add or correct any information (verified) that might help others.

Here is Samsung's KNOX website that included information and the "KNOX" store:

https://www.samsungknox.com/en

Basically, KNOX is meant for business and enterprise applications as fully described by the above link. KNOX is NOT a single app, it is an entire security solution implemented by Samsung that uses an entire suite of apps to accomplish it's needs.

There are a lot of people asking about, "Why the AT&T 4.3 update does not include KNOX?" The simple answer is that it DOES. It must be activated for administrative privileges on the phone under Settings / Security / Device Administrators. What the AT&T S4 and NOTE 3 4.3 phones failed to include is the app that allows for the creation of separate profiles "KNOXstub.apk". This is completely AT&T's fault. Here is a link to the NOTE 3 forum that better tells the story:

http://xdaforums.com/showthread.php?t=2470278

Again, that is from the Note 3 forum but most of the information applies to the AT&T S4 as well.

**UPDATE** The app "Knoxstub.apk" from the Note 3 forum thread above has been confirmed as working with the S4. If you use it, make sure to give proper credit and thanks to that thread's creator (OP) and the person that supplied the apk. (he is mentioned in the thread). Also, make sure you read that ENTIRE thread for information about possible negative interactions between KNOX, root, and other modifications. There is always a possibility something could go wrong so the risk is yours.

Here is a link to the "Knoxstub" apk that was posted in the Note 3 forum. Thanks jimlmackjr for re-uploading it for the S4 community.

https://www.dropbox.com/s/i4b4seez92j2mhx/KNOXStub.apk

.............................................................................................................................................................................................................................................................................................................................

There is an app on the PlayStore that is for AT&T phones:

https://play.google.com/store/apps/details?id=com.sec.knox.app.container&hl=en

This app might only be compatible with the Note 3, I can't test it because I am on MDL. However, it is the profile creation app (called KnxAppLoader on the playstore).

**UPDATE** The app at the playstore was reported as showing "incompatible" with an AT&T 4.3 S4, which means it is probably for the Note 3. So, the extracted app method will be the better bet at working or maybe the playstore app can be side loaded?).

..............................................................................................................................................................................................................................................................................................................................

If this app is not compatible to the AT&T 4.3 S4, it might be possible to extract the Knoxstub.apk from an Internation I9505 4.3 ROM or firmware and install it on the AT&T S4 with 4.3. THIS IS COMPLETELY UNTESTED FOR THE AT&T S4! However, the Note 3 forum was able to do the same thing with the International version on the Note 3 (again, information about this is in the Note 3 forum link above). Here is a link to a thread in the I9505 General forum that has the newest stock 4.3 (International 4.3) firmware. Again, credit goes to the threads OP. This stock firmware can also be downloaded from SamMobile.com:

http://xdaforums.com/showthread.php?t=2252982

Download the latest International (I9505) stock firmware (MJ9) and extract the Knoxstub.apk.

If it works, the apk should install like any other apk and start loading additional files that will include the profile manager apk.

1. Again, there is always risk involved.

2. This is all as of yet untested.

3. As of now, there is no ODIN file for MJ9 and no way to "fix" the phone if it messes up!

Hopefully this information will help clear up some confusion over KNOX and maybe help people to obtain the profile manager apk they are looking for.

Good luck.