yes and i use it all the time when texting. after you've spoken your sentence, speak the words for your punctuation mark and the phone will fill it in. such as:
would you like to come over question mark
and the phone will convert it as:
would you like to come over?
yes, it does. i use it all the time when sending text messages. after you've said your sentene, just say the word for the punctuation you'd like to use, too. such as, you'd say "would you like to come over and watch the game question mark" and the centura will convert it to:
would you like to come over and watch the game?
it's not flawless, but once you get the hang of how you need to pronounce words and enunciate, you're golden. :)
It does, though I have not used the feature.