Since Sat Mar 9 (where I found that VZW had a pretty massive outage affecting a large part of the US), I've had wildly inconsistent 3G/4G data, but I've also not been able to make/receive voice calls or send texts. When I make a call, I either get mobile network not available right away after hitting send, or I get an automated msg from VZW saying my call is going to be transferred to an external operator to be completed as a calling card, collect, or credit card call; and then the call drops.
VZW says that there about 10 open tickets from my home zip code alone with similar symptoms, so they're pretty sure it's not my device. Issue is that my phone is out of warranty, so not sure what they're going to do.