My A70 works with my active sim card from Verizon prepaid. However, the device will not show as the active one on my account when I log into my online profile. As long as the phone is working, I could care less if Verizon "supports" it through various repair or insurance plans, those are a waste of money and in my experience are usually dead-ends. . . .
Besides, the Federal Government made a mandate several years ago, telling the cell carriers that they needed to make phones cross-platform compatable. All the companies continue to resist. But if you have an unlocked phone, you can still use it on Verizon, just don't expect customer service to sound anything more than a bunch of scripted fools that only know what is on the screens from their corporate portal in front of them.
The real leap forward is going to be the 5G networks. Once that is more commonplace, I predict that much of this idiotic garbage about compatible devices is going to go by the wayside.