I used up all 10 GB of my data in one day, ya'll said it was a Samsung that used it up even though I had not used the phone that day but did have it turned on. I have since made sure the wi-fi app is disabled on the phone. you gave me a once in a life time 5 Gbs and it too was used up in one day. How do I find out what is doing this. If you look at our past record we have only once or twice before used up our data and that in over 3 weeks of usage.