[Galaxy S 4 Q&A, Help & Troubleshooting] rsngfrce:
Thanks for the response!

An answer from an actual living human being... you don't know HOW MUCH I appreciate it! :highfive:

I already tried the Sprint Galaxy S4 forum, as I said, and did not get anywhere. My IMPRESSION is that THIS is the GENERAL Galaxy S4 forum, PLEASE correct me if I am wrong about that, I find the phone specific forum structure somewhat confusing. I had planned to jump straight to the General Android Q&A and Troubleshooting Forum, but decided it was better to try here first... maybe that was incorrect?

You make a VALID point about starting from scratch, I will certainly admit, but comparatively, I don't believe my phone is THAT modded, it is relatively stock compared to what a lot of users do with their phone here. There are many things I could try and haven't, such as trying a pre-NAE modem, but since the NAE modem WAS working, my expectations are that that would not help. While not starting from scratch, I have regressed CONSIDERABLY I feel, by Nandroiding back to the point before I believe I had the issue (although admittedly, I then reinstalled pretty much everything, possibly including whatever is causing my issue). I can Nandroid back to MF9, which I have NOT done, and see if the problem still exists, which would certainly seem worthwhile and something I SHOULD do.

One thing I will mention is that I haven't is that this thread Galaxy S4/Note 3/Mega - Update Profile/PRL/HFA Fix for Sprint/Boost/Virgin Mobile/etc makes me fear (very possibly incorrectly) that my issue may be caused by my MDN, MIN, Profile 0 and Profile 1 being incorrect (thinking I corrupted them while messing with the APNs), but the ability to fix them as described in the thread is a bit beyond my capability AND if this was the issue, again, I don't think the mobile connection should be working at all, not just stop working after a while.

Also, just for the sake clarity I should mention this: when my phone looses the mobile connection, if I try to make a phone call, it just dials and will not stop dialing (though not actual 'dialing' can be heard). Attempting to end the call accomplishes nothing. If I force close the Phone app, the notification bar turns green. I just tried the app Disable Service today while my mobile connection was lost. I disabled any service I found running that I thought MIGHT end the Phone running (green notification bar and unable to end call). Numerous service that I ended would not end. Nothing I ended ended the Phone running and I ended up rebooting and re-enabling everything (except for

com.sec.enterprise.mdm.services.vpn.knoxvpn.KnoxVpnEngine

, which was running under Enterprise VPN Service, while

com.sec.enterprise.mdm.services.vpn.old.EnterpriseVpnAnyconnect

was NOT running... I believed I had deleted ALL Knox files from my phone, but I am unable to find where the 'KnoxVpnEngine' is located, both of these appear to be in the same Lib file to my limited understanding, in data/data/com.sec.enterprise.mdm.services.vpn/lib, which is a symbolic link to data/app-lib. If they are BOTH in this same lib file, then I do not know how to remove the Knox portion... and I may sometimes sound like I know more than I do I should point out, I just try my best.)

I WOULD greatly appreciate if ANYONE would let me know if I am correct in my belief that this is the GENERAL Galaxy S4 forum, or I am incorrect about this.

Lennyz1988, I have recently been becoming very disillusioned here, I spend a great deal of time here answering other users questions, but seem to have great difficulty getting anyone to answer the rare questions that I have. Just finally receiving A RESPONSE to this thread has made my day and I GREATLY appreciate your input! :highfive: :good: :)