Microcell - Change primary number help.
I have been using a microcell with my iPhone (because of a very poor signal at home), and want to switch to using AT&T wifi calling instead. But, I want to keep the microcell active for friends/visitors to access. My phone is the primary number on the microcell. How do I change that? Do I have to delete the microcell and start over? I can change/remove any other numbers, but not the primary. Thanks for your help!