Welcome!
Here's what we know right now:
* The exact issue is your phone will drop off LTE and bounce between 1x/3G. You probably won't go back to LTE without going to Airplane Mode and back. If you're using VoLTE, your call will drop as well.
* SIM swaps and device swaps don't do anything
* 10.0.2 (new general release) and 10.1 beta 1 do not fix the issue
* Verizon has a ticket number that you can reference ticket 102095-091716 - call 611 and add yourself
* Turning off VoLTE (Settings > Cellular > Cellular Data > Data Only) helps control dropped calls, but not data dropping to 1x/3G
* The problem is worse when you're moving between towers (esp. in a car), but can happen staying in one place
* The most current carrier version is Verizon 25.1
* The most current PRL is 15480
* The most current modem firmware is 1.00.04 (which is installed with 10.0.2)
* The 10.1 beta 1 uses Verizon carrier version 25.5 (which does not fix this problem)
This was amazing info thanks brother! Also I just notice my PRL is 15467 I see there is 15480 any way to be able to upgrade mine to 15480? I'm sure it does nothing my my OCD kicks in.