Smartphones live a secretive life full of things you might not know… For example, they have a radio built into them that – gasp! – can’t be turned on!
This question is far from being the only smartphone mystery. Why does the quality of sound differ so much in headphones and in the smartphone’s speaker? Why are there non-removable batteries at all? How can a compass work inside a phone if there’s a magnet in it too? Let’s find it out!