[Q] NAE started loosing mobile connection & GPS?

RELEVANT DATA: Sprint Samsung Galaxy S4, Software version: NAE, Android version: 4.4.2, Baseband version: NAE, Kernel: KT-SGS4 4.4, Recovery: PhilZ Touch 6.48.4, SuperSU. Stock Rooted. Upgraded to NAE from MF9 with the method in this link: [HOW TO]Update to 4.4.2 NAE w/Root while Keeping MF9 Bootloader w/ Lock Screen Fix, so no Knox.

Upgrade went great, it was actually the most stable phone I have ever had. Then, all of a sudden, I started loosing my mobile connection and GPS a while after booting the phone.If I reboot the phone, they start working fine again, but after an unknown amount of time, they both stop working again. WIFI never stops working. I have no idea what caused this to start happening and it REALLY SUCKS!

I did edit my APN, trying to fix an issue I was having with sending MMS's, but I'm pretty sure I restored the NAE stock version, which didn't help.

I have attach a logcat filtered at warn and higher and I tried to make a call during this logcat and was told I had no mobile connection. I really can't read these things, so I don't know if there is anything useful in there.

If anyone has any idea what might be causing my problem, I would be eternally grateful for some assistance!

I'm becoming convincinced that I must hold some sort of record on XDA for having the greatest number of issues that nobody else has ever experienced...

I appreciate both your suggestions and will consider them. What I don't understand though would be why it would be working perfectly for a month or two and then suddenly develop the issues out of the blue? Also, I haven't seen anyone else who upgraded with this method mentioning this problem. This tends to make me think the problem lies elsewhere... possibly related, but elsewhere.

(By the way, I raised the question of why I would care about Knox if I was out of warranty and it was pointed out that once you have Knox, you can never go back to MF9... and who knows if I might decide I need to do that for some reason... I prefer to have the option at least.)

I'll tell you what is really STRANGE... right now my phone has been 17 hours since boot and both the mobile data and GPS are working... I can't remember the last time it has gone that long! Maybe my random twiddling finally fixed it...

WELL... of course, I spoke too soon, the issue has now returned. I'm at 22 hours after boot, but I don't know when it started and I did reboot since I said it was working after 17 hours...:banghead: