So I went over my data last month with Verizon, I'm on a 2GB plan and then I normally pay $10 for every GB I go over. But I noticed with my new bill that I wasn't charged for my overage last month and they had this little line. "Unbilled Usage from Previous Months (Data usage is applied against any remaining allowance for the month in which the usage occurred.)" I have never had this happen before and couldn't find any news articles about Verizon also adding rollover data. But thought I would post! And guessing this stems from T-Mobile and ATT adding it.