Currently have 3-lines with phones (all paid off). Looking at getting my daughter a phone, adding a new line. Looks like current promotions I can get a new iphone (128GB) for free (applied by monthly promo credit) by adding an unlimited line. Once I get the line/phone would I be able to switch the line number between my phones, and still get the promotional credit . The goal is to give my daughter the new line with my wife's existing iphone XR, and my wife get the new phone with her existing number. So total 4-lines for my entire family. Just making sure will be able to still get the monthly promotional credit.
