Has Verizon's data accounting changed? Back when unlimited was the norm I would float around 2.5GB of usage. I think one time I used it a bunch and hit 4GB which surprised me. Right after the change to tiered data plans I stayed around the same amount.
Nowadays I can break 10GB without much effort. I can watch YouTube videos for 10 minutes and it looks like it's used 500MB of data in that time. I've gone over my data allotment the last 2 months and on the way to doing it this month.
I know some will think LTE is so much faster which causes more data usage. However, I didn't use this much data for the first year or two after I had LTE. Also, 3G used to be very fast way back before 4G LTE came around. Now 3G is ridiculously slow and nearly useless.
Updates are set to only over Wifi. The phones data usage graph matches what Verizon says fairly close. But, I will never believe I have magically tripled my data usage in the last 3 months.