The first part of my sentence only applies if you think you can/have audit(ed) every line of code running on your iOS device. If anything you're the one saying it can be done by you without any substance.
> There is a finite amount of code on the system. That code would also include any functions related to stenography or remote activation and could be easily called out.
Hint: You do not need to manually, personally, audit every single line of code to discover the use of such functionality.