How do I remove my cell phone and number from a family service plan and switch the number to a new plan/phone?

I am part of a family cell phone service plan with Verizon. I want to exit that plan and purchase a 2 year contract with AT&T along with a new iPhone, but also keep my same number. Can anyone help me out and explain the procedure involved?

You will need to take a copy of a current bill and go to an AT&T store and tell them that you would like to port your Verizon number to them and they will get everything started for you. If you are still under contract with Verizon then you will have to pay their early termination fees