I have a 16Gb plan with 4 phones. for the past 2 years we had 2 galaxy 7S and 2 S7 Iphones. we never used our 16Gb, always had data left at the end of the month. I upgraded the 2 Galaxy's to the 9s. Since the upgrade, the Galaxy's are using a lot more data and we go over most months. Our phone usage has not changed. The only thing that changed is the 2 new Galaxy's. Why are we using so much more data?