I don't think using your personal phone as a presentation device is the best idea, you can avoid most of those issues by simply having another device to present

I don't think using your personal phone as a presentation device is the best idea, you can avoid most of those issues by simply having another device to present your app on, a used iPhone, or even iPod will be very cheap to get, no one will see that hardware anyway. This way you'll avoid the wallpaper, calls, browser history, airplane mode, etc.. it'll be basically always configured for presentation mode, and you can also use it for development and as a backup phone !, fuck me right ?! :D