Yesterday I went over my data for the first time in years and I have 4 days left so I really watched was I was doing. I reset my cellular statistics and I'm always on WIFI at home but when I did a facetime call I noticed that the counter increased for Facetime, even while being on WIFI. I turned off the cell data for Factetime and it still worked but did not use cell data this time. Anyone else see this type of problem?