Last month and this month, my data usage has more than doubled for no reason. I am using data even when at home on my Verizon fios WiFi. I keep getting notifications to upgrade to unlimited data- but I have never gone over my data limit until last month. I feel that I will be forced into the unlimited plan due to overage charges. Does anyone else have this problem when connected to WiFi? I have to turn off my cellular data but as soon as I turn it back on it uses massive amounts of data.