> Is it even possible to do this on an iOS device that's on 4G No. > Is it even possible to do this on an iOS device that's on [...] someone else's wifi Yes,

> Is it even possible to do this on an iOS device that's on 4G No. > Is it even possible to do this on an iOS device that's on [...] someone else's wifi Yes, since you can do it on your device, and do not have to do it on the router. Drawback is you have to do it for each Wifi network anew. > Do iOS devices have the same "leak" Yes, there is nothing that prevents apps from phoning home (or phoning every one of a dozen data collection "partners")