It is exactly what I refered as our classic internet. It is our current internet draw back, and it is exactly why I decided to use email, instead of centralized servers and domain names. As I told before, you can run your personal mail server. I designed a system that works independently by using the most independent protocol in the internet.

Please read the paper carefully and ask me what part you didn't understand. By the way I explain it here again.
You install the wallet and config a fresh dedicated email address in your wallet. Then you can add your friends wallet email (as payer or payee) to your connection. Now your mobiles are communication together by PGP-encrypted emails. You want to send Bitcoin, you just sign the transaction and your mobile deliver it to your friend mobile. On the other side your friend mobile decrypt and parse your email and show his balance in his wallet. That is all.