If I buy a phone in lets say Florida but live Arizona do have the option of using area code as part my primary number?

No, you cannot use the area code from a different state as part of your primary number. When you purchase a phone in Florida, your phone number will be assigned based on the location, meaning it will have a Florida area code. If you move to Arizona, you will need to obtain a new phone number with an Arizona area code. Some mobile carriers allow you to keep your existing phone number and transfer it to a different area code, but this may not always be possible and may involve additional charges.