New to Visible

I just signed up for the 15 day trial with Visible. I currently use Verizon and have not yet canceled my service with Verizon. I am using a iPhone 13 mini.
A few questions:

how can I tell if I am using Verizon service or Visible service? do I need to switch to the new phone number that visible has provided in order to be using Visible service? If I am using the new number that visible provided, will I still receive phone calls if people call me on my old number?

thank you for any help that you can supply. 




Intermediate III