Bill received today, I am switching service on Tuesday

Thank you. No past due balance and i fully paid off the balance on the one phone still owed. So I can port before the next billing date without having to pay it Tuesday? Since that is not past due, as it is 3/16 due date. That is how I am reading that. I tried to do it before, but my phones from Verizon were not going to be here on time. That is terrible practice, you should not have to pay for service you do not receive. I call that theft.