Not sure entirely how this works but it seems way to easy to transfer money if you don't have an IBAN. I know all the young people are using their phones to pay for things but it makes money careless to me. But then I still use cash a lot.Instant payment is only half of the problem that Revolut solved; the other is 'identity', i.e. being able to pay someone stored in my phone address book, rather than having to deal with 34-character IBANs.