@Beldor
It's been years and I did not know, I understand better why I also have apps that turn in the background even though the updating in the background is disabled.
Thank you for the information.
For my part and whatever the iPhone, I have a big consumption as soon as I am not at home, the other time a day in Disney, I made around thirty photos and I went from 100 to25%...
Even without using it the consumption in standby is much more important than when I am at home.