Sorry for the late reply. I would be very surprised if iPhones and most Android phones had this "maintenance mode". There are many people that are very familia

Sorry for the late reply. I would be very surprised if iPhones and most Android phones had this "maintenance mode". There are many people that are very familiar with every aspect of the hardware and software. When you have access to the bootloader, kernel, OS and even the init process before the bootloader, there isn't really anywhere to hide such a thing. This just seems like outdated and paranoid policy to me.