3 ms·

Unless you know something about the protocol that I don't (quite possible), it's not silent: all you devices get "new device registered to iMessage" dialog box.

• ronyfadel 5y ago
  That’s a notification pushed by Apple I guess?
• shuckles 5y ago
  Since Apple operates the key service and there is no key transparency mechanism, they could certainly do it (technically) with only a server side change.