I have to economize on mobile broadband WiFi, so I was alarmed to see, using Datamonitor app, that something was chewing through data at a rate of about 600 Mb in just a few minutes. To summarize, I double clicked and turned off all apps but still the insane rate of data usage continued. Incidentally, a few days ago when setting up the new iPad Mini Retina, I had previously gone through the settings to turn off anything in the settings that could eat data, for example, background app refreshes, all the app store and iTunes background app and music updates. Given that I turned off all the apps, and the massive data usage continued, I can only think it could be the iOS that is doing something like downloading an iOS update but I am on the latest 8.1.2. Do you know any apps that can tell me where all the WiFi data is going? I saw that iOS can I see identify where cellular data is going, but I am using WiFi here. The app, My Data Manager, claims to have that feature but apparently that feature doesn't work in iOS 8.