My Main Question. If I sign up for a plan with 500 MB of Data and 500 MB of Shock-Free Data then How Much Data Can I Use Before I Get Charged More ???? I can't tell if I get 500 meg or 1 Gig included. Does Shock-Free mean that I start getting notifications that I'm at 50% once I use 500 MB? Also - How do I make sure Notifications are turned on so I don't go over my data limit??