On iPhones the notification is center of the screen in a big graphic. On my LG2 all I get is some tiny icon in the notification bar. Also on teh iPhone the lock screen wakes up to show the voicemail prompt/graphic. On the LG2 teh screen is still dark. So unless I turn on my lock screen, I never know I have a v-mail.
iPhone lock screen prompt looks like this:

iPhone lock screen prompt looks like this:

