step one is don't carry a mobile phone You can carry one if you don't use it to contact people you know. But of course you will, ignoring the advice from the t

step one is don't carry a mobile phone You can carry one if you don't use it to contact people you know. But of course you will, ignoring the advice from the tough guy that's trying to save you, according to every movie ever touching the subject. More sophisticated attacks would identify your usage pattern, the date you bought the new phone, the train that sounds in the background or even the fact that you log in in your favourite cat videos site.