@ColinTheMathmo That sounds absolutely bonkers, but surely there must be processes that can be used by people who literally don't have a smartphone. E.g., checking in in person at the airport, paying for things with a credit/debit card, getting cash from ATMs.
(But ... Australian mobile networks only turned off their _3G_ coverage two years ago. Do they even have 5G everywhere? This sounds to me like it must be some sort of misunderstanding.)