The news item on crime in New York City - due to high theft of Apple products - prompts me to ask: if I've set an immediately-activated password lock that activates when I turn off the phone, how safe is my data if the iPhone is stolen? The thing is, if the iPhone was so bullet-proof safe, why would the thieves steal them in the first place? Obviously, it's because the iPhones can be re-used. So, when stolen iPhones -- which had passwords -- are re-used, does that mean the data is wiped by the thief in order to re-use it, or can the thief get at my data? I read articles that iOS 5 & 6 are so secure, and yet there are also articles advising us - once the phone is stolen -- to change all our passwords and email addresses etc. Why would that be needed, if the data is safe? I'll be in New York City soon for half a year, and will need to use the subway every day, even at night - so my question is more than academic. (When traveling on the subway during safer hours i.e. not at night, I intend to use the iPhone to read Kindle books during the longish subway journeys to and from Brooklyn.) I'm not so worried about losing the phone since it'd be covered by insurance, but it's the data I'm worried about. p/s I use iOS 5, and haven't yet upgraded to iOS 6 because of reported poor battery life on iOS6 - but I can be persuaded to upgrade if iOS 6 it is significantly more secure. Other than that, I really don't need any of the new features of iOS 6, particularly abhor Facebook integration.