Verizon is hit or miss. Some people have it working fine, Others have trouble. The OS won't make a difference, I have seen peple reporting that they get a notification from Verizon that the phone is unsupported, but so far not much evidence that there is any enforcement yet, When i had my Verizon SIM in my Pro 1, ages ago, it worked for a few months and then SMS broke. I gave up. I now use Ting in my Pro1x (which is T-Mobile).
Here is the long Verizon thread:
https://community.fxtec.com/topic/2133-fxtec-on-verizon