I tried over the last few days to get the new voice to auto-download (several reboots, resets, etc.). I finally did an Erase All Content and Settings this morning, setup as a new phone, and asked Siri to tell me a story. It replied with the old voice. I left it alone, plugged-in on wifi for about 30 minutes, and now I have the upgraded voice. Just wanted to pass along incase others have problems getting the new voice; may have to erase and start all over.