Cryptocurrency value the anonymous and you want people to give away their phone number just to send cryptocurrency? Also, if I don't need to register in the application itself then how I could claim that phone number is mine? All of this sounds very vague and bogus.
If the crypto community wants to reach the global level without restrictions and with the support of regulators and States, then we need to develop according to the standards that every market participant is used to. As far as we remember our messages not one of them said that you should not register! Registration in the app is via email, phone number with confirmation of each!