In my particular case, I've never allowed wifi assist for one minute ever since the beginning of iOS 9 and I never used iTunes on my iPhone nor listening to any music from it. For the iCloud you are talking about, there is an isolated list at the bot...
I have always been using different iPhones in the past, but whenever I go to PM self serve site now, I discover that my data usage is more than my iPhone's stats from my day one's manual reset. My data stats on iPhone shows approximately 80% of what'...