I can't set up Wi-Fi Calling on MacBook Pro or iPad Pro from iPhone 12 Pro. Notification shows up on these devices and it keeps coming back for every 1 - 2 minutes
I try to turn on Wi-Fi Calling and for other devices on iPhone 12 Pro (T-Mobile). Notification shows up on MacBook Pro (Big Sur) and iPad Pro 11-inch (iPadOS 14.1) so I select "Turn On." Problem is that the notification keep coming back for every 2 minutes on both devices. On iPhone, "Add Wi-Fi Calling For Other Devices" turns on and off by itself, probably after I select "Turn on" on MacBook Pro or iPad Pro.
Apple rep said it's T-Mobile's issue, but T-Mobile rep can't figure out how to fix it either. Any advice is very much appreciated!
iPhone