Is there a way to determine what was being processed by an iPhone at a certain time? The reason I ask is that I received a notice about getting close to my monthly data limit yesterday. I reviewed the data usage by line, and found that my son's phone had used about 350mb worth of data at 4:10pm yesterday. It was a time when we were in the car for about a 15 minute drive. I am not sure if the time marking of 4:10pm was the start of the usage or then end of the usage. He said that he was only listening to music at the time (locally stored music, not streaming). My thinking would be that maybe some background apps had started downloading when home, and maybe continued when in the car. Or, possibly an iCloud backup. Anyhow, I'd like to try to determine what had occurred to avoid it in the future.