So I bought iphone 4s for my family. Occassionally at night, I see these "phone Internet/MEdia Net" on all the phones when I view my Data Used summary. I have read about this as an existing issue. However on my son's phone, I see the "phone Internet/MEdia Net" over and over like 20 times a day a couple of minutes apart. I know he probably has various communication Apps like Facebook, IM, etc. I know he also has the Sirius Radio app. However, I can't quite pinpoint which App is causing the usage. Any ideas?