> I think in the end we need a cross-platform messaging protocol that replaces SMS/MMS that is not reliant on a single app vendor, provides end-to-end encryptio

> I think in the end we need a cross-platform messaging protocol that replaces SMS/MMS that is not reliant on a single app vendor, provides end-to-end encryption and will be supported by mobile network providers. Except for ".. will be supported by mobile network providers.", doesn't Jabber/XMPP already fulfill all of that? Also, I'm not sure what you mean by support by mobile network providers.