I have a 6600 on the Verizon network. When somebody calls me and goes to voice mail, they get the option to press 5 to leave a callback number. Where I work we use this feature a lot, but ever since I got my 6600 it doesn't work. I get the notification as a txt message, but there's no callback number in the txt. I've talked with Verizon about it extensively and they can't seem to figure it out. They thought it might be my phone so they sent me a new one The new one does the same thing. Has anyone else experienced this? Any ideas.