I am looking to add a new line for my son on my existing plan and take advantage of a promo credit that will pay all but 10 dollars of this new device payment per month.
My question is, I would like to switch my phone number to the newly added line and give my son my existing phone as is he only 10 and does not need an iphone 16. If I have a monthly promo credit on my current phone (iphone 14) and receive a new promo credit for the iphone 16, do those credits stay in effect on our bill and all that is changing are the phone numbers associated with the devices?
Thank you!