Comment 4 for bug 1426876

@Tony, the indicator makes a libnotify request (which goes over dbus) with a bunch of special x-canonical hints that tells the notification daemon (unity8) to render the notification as a PIN entry. unity8 does so and then responds to the indicator (over dbus).

It is certainly possible that unity8 is not replying to the indicator. Or that the indicator isn't responding back to ofono.