[1] https://www.dbs.com.sg/personal/deposits/pay-with-ease/payno...
This is happening right now in Europe. You have systems like Blik, Twint, Swish etc.
I know that at least Blik is working on making it possible for international payments.
International transfers between MB Way (PT) and Bizum (ES) are working e.g. via phone number. See also https://en.wikipedia.org/wiki/European_Payments_Alliance
[0] https://en.wikipedia.org/wiki/European_Payments_Initiative
[1] https://en.wikipedia.org/wiki/European_Payments_Alliance
There has been massive resistance by the incumbents of course, including banks (since they too charge a fee on top of visa).
It's been in the backlog for years but the US sanction against ICC judges leading to them being cut off from most things including payment triggered a renewal of it.
There are third party apps you can use to pay with pix using a credit card, can't recall that name, but read about it here a few months back, on another pix-thread.
> CPF (Brazilian Tax ID). Then to open a bank account
Getting a CPF is absolutely trivial, but I'm not sure you can open a bank account without RN/RNE, at least not with local banks. Can probably manage with one of the online banks.
Who did that?
Most people except for criminals and refugees used traveller's cheques:
https://en.wikipedia.org/wiki/Traveller%27s_cheque
I think some banks, like AmEx, still issue them.