[asdaq1312512]

Is RCS possible without phone number? Like, Google would just set up an RCS server that accepts GMail addresses, and only falls back to your contact's phone number if they can't route the message? I just find it odd to have carriers involved at all (through the phone number), but sure, it's probably compelling to use an established concept.

[AAAAaccountAAAA]

Not sure if I understood it correctly, but this specification seems to discuss about SIP URI based non-mobile identities: https://www.gsma.com/futurenetworks/wp-content/uploads/2019/...

[asdaq1312512]

Thanks!