Two Factor Authentication is unusable if you have no signal!
Why does Apple not realize that when people travel sometimes they are in areas with NO SERVICE, so 2 Factor Auth doesn't work, and using a trusted number is also NOT an option because your travel partner also doesn't have a signal?
I have to keep opting out of it because I regularly travel to areas in the USA with no signal, (they exist) but still need my phone for other functions, and I have read horror stories of people unable to use their phone for anything if they can't 2FA because of no signal. The Apple Genius I spoke with confirmed this is a problem and that once you get 2FA, you can't opt out.
This is also a problem in a foreign country when your cell provider doesn't have foreign roaming without ridiculous fees.
The annoying thing about this is I am unable to use Apple Pay or Apple Wallet without 2FA.
Apple needs to make an Authenticator app that does not require access to internet or cell service for 2FA.
iPhone 15 Pro