Your mobile phone — it's like your best friend. You likely spend more time gazing at it than at your own family. It's your main source of information; you may even be reading this on it.
But do you know with whom it's also communicating? Which companies is it relaying data to, what information it's sending them and who else can access it?
Channel 4 News technology journalist Geoff White and ethical hacker Glenn Wilkinson know — and they've produced an interactive show to tell you more. Get a flavour of this unsavoury news for yourself in the video above.
The Secret Life Of Your Mobile Phone is at Etcetera Theatre Camden, 4-7 December, 9pm. Tickets are £8, available from the website.