Before I did the recent update whenever I was linked to WIFI the 4G would not be lit anymore but when I went off WIFI it became lit again. Now it is on all of the time. I have called verizon tech support and she told me to turn my mobile data off each time and that just can't be correct. I also went into a verizon store and spoke with them directly and that rep said because of the upgrade my 4G will always be lit and as long as my wifi says connected to a network I am not using data. My question is how will I know for sure if I am really pulling off wifi or actually using my mobile data and being charged? I am not tech savy , I am trying to learn, verizon was of no help, thought maybe a samsung message board might be able to help. any advice? thanks in advance