still no help. the whole note 3 GPS thing is definitely related to AT&T's files for the GPS. None of my coworkers with the same Verizon or T-Mobile Note 3's have this issues. I tested it extensively on my business travels this week and they way to 100% prove it was easy. Put the phone in Airplane mode, then turn on GPS and Bluetooth (to get sound through my car stereo). This will 100% disable the cell phone portion but will show that the GPS will indeed work just fine. ZERO drops in GPS Signal doing this. However, I'm without my phone being turned on. That's okay for me for now as I really shouldn't be driving, talking and navigating all at the same time. However, it's a band aid and I really do need my phone on in case a customer or appointment calls while I'm in route. It also forces me to use Sygic or TomTom with preloaded maps vs Google Maps that need cell tower reception to pull down data/graphics. I can do this but again, a work around that shouldn't be required.
The end cause for me is when the phone cell towers jump from LTE to 4G or back again. If that's allowed to happen, 100% the GPS will drop. Good news is after a couple minutes it comes back, but it's not good when I'm navigating around and it drops.