Porting means keeping your current mobile number when you switch to Zable Mobile. You don't get a new number, and you don't need to tell anyone you've moved.
To port, you ask your current provider for a PAC code (a short code that gives us permission to take over your number). You give us the code during sign-up, and we handle the rest with your old network.
The switch usually completes within 1-2 working days. Your old SIM stops working at that point, and your number starts working on Zable.
If you'd rather start fresh, you can pick a new number instead.