Can you choose your phone number when you buy an iphone 5 at best buy?

At best buy today you can trade in an old iphone 4 or 4s for a 150$ credit on a new iphone. Can you choose your own number if you buy an iphone at best buy, or is it just an automatic one?

** I don't already have a phone number btw **

You can choose, provided the number is available, or you can use your old number.

They usually give you a list, ask you what you want your number to start with, end with, etc. And you choose one on the list.