So, the last couple days, a couple times, my SIM couldn't be found, usually toggling data, and airplane mode fixed it, but it got me thinking.
When I picked up the DNA, and the guy a VZ put in the SIM, I could tell it was the first one he's put in a DNA. The SIM drawer never quite sat completely flush with the top of the phone, but since everything worked fine didn't think anything of it. After a couple instances of the SIM not being able to be found, I got to thinking and removed the tray and reinstalled it and now it sits perfectly flush with the top of the phone.
Just something to try if anyone else whose had the SIM issues.