VoiceOver and Siri on the iPhone are revolutionary for blind or partially sighted folks. Great accessibility innovation. I am sure I will need it someday myself.
But at the moment, I can’t stand either of them, because they totally mangle comprehending my variably NZ/UK/US/Canada accent. Sadly, the iPhone 7 has shortcuts set by default to activate the damn things.
To turn them off, go to Settings > General > Accessibility > Accessibility Shortcut and uncheck everything on the list.