Pff, Apple can't even keep your contacts intact if you go abroad.

I traveled to Australia and got a local SIM. Suddenly every incoming call was from an unknown caller, even though every one was in my address book. Apple is too stupid to handle international calling in the 2020s. I mean... WTF?

Then again, this is the same company that "helpfully" changes all your calendar appointment times when you travel to a different time zone... with NO WAY TO PREVENT IT. So if you go east, you're going to miss any events you set up in advance... including flights home.

And Apple won't let you add all your "trusted phone numbers" to all those accounts. So, if you are in country A and your country B phone can't receive SMSs, and you get a new device, you can't log into country B account because 2FA via SMS does not work. (And no, you can't just make multiple accounts on a MacBook or other device that supports multiple accounts for non-SMS 2FA; login fails.)