I was also relieved to see that I was not the only person this was happening too. Thanks for making the original post. I did the same thing, disabled the Verizon Messaging app and reverted back to the default. I left a negative review on the app store for it as well to warn other people and hopefully get Verizon to acknowledge the issue. I don't know what the app could possibly be doing to use THAT much data though or why it just suddenly started doing it.