I have an iPhone 6s and for the past 2 months, I've received notices from my carrier stating that I'm about to go over my data plan limit. This is strange as I rarely go over my limit and nothing has changed from my daily usage habits. My carriers billing starts on the 11th day of the month. This period I had decided to track my usage on my iPhone and had reset the statistic under the iPhones Cellular Data Usage page/function. Again, I'm 6 days into my billing period and it's showing that I have used 626 MB already. This is also confirmed on my carriers app. Wait what?!! I then decide to count all of the data from each app from my iPhones Cellular Data Usage page, and it equates to 70 MB. That's a 556 MB difference!!!??? Anyone else experiencing this with their iPhone 6s? Any suggestions / recommendations would be appreciated. Cheers!