I recently upgraded from 4GB to 8GB. Unfortunately, I set it up start immediately instead of back charged. I called customer support and they cannot change the "start immediately" to "back charged". My concern is that I am going to get overcharge for the first part of the cycle. If I go on myverizon it only shows the data used and available since I changed the the data plan. Why? Thus I cannot tell what occurred in the first part of the cycle. Customer service is no help. Estimated bill shows no extra changes. Can anyone help m e?