Yes you can!
it’s up to you on how you want to transfer.
Some of us did a trial with temporary number while keeping our original carrier.
if all went well, we ported in our original number to Visible.
Or if you are a little more daring 😀, you can port in your original number when you sign up for Visible.
if you go this route, you will need to port out from your original carrier before signing up with Visible.
I came from Verizon and used this port out procedure
I ported from Verizon to Visible and had no issues over a year ago. However one very important thing is to not disconnect or cancel the Verizon service before the port is fully working on Visible. Also Verizon automatically disconnected my account when the port was finished so that was nice.