I have just discovered this same problem with one of my phones. It is a Galaxy Mega. The same type of charges are appearing al through Oct.. AT&T is no help for this. They say they can't tell me even what the int/MD means due to privacy issues. That's very frustrating when we are getting charged for data usage and we don't know what it is from. One person at AT&T suggested I download an app called onavo and that it would tell me exactly what was causing the charges. I have not done this yet but am going to very soon. I am on the mobile share plan and we are sharing 1 GB of data.
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