It is concerning to hear that this amount of data is being used without an explanation, jagermeister5. Message+ should definitely not be using this much data. There are certain features within the app that can incur data usage. Can you please tell us what other features of the app you are using besides messaging? Can you please also provide details on where you are seeing the data usage for the app? Is it in the device settings or My Verizon? 

MarshallP_VZW