At least in Finland not having an address is not a huge hassle. You can always put poste restante (a post office pickup) address if needed. Physical mail is quite rare for official business, and almost everything can be done online.
But not having a bank account for authentication or a phone number for many things is a disaster. Banks are mandated to give free basic banking services for everybody though, and a prepaid number is OK.
But in UK for example not having a utility bill with your name on it is a disaster.
Curious, to have that prepaid number, is it required to show an identity document, are other identity verification methods (like an affidavit) accepted, or is it just free to purchase ?
Do those banks insist on having an iOS/Android smartphone ?
But not having a bank account for authentication or a phone number for many things is a disaster. Banks are mandated to give free basic banking services for everybody though, and a prepaid number is OK.
But in UK for example not having a utility bill with your name on it is a disaster.