I had a phone call yesterday from a foreign number to my mobile asking for details about my account. How much was in it, what I was doing to get the money, what I was going to do with it... I refused to give them any information there and then. I don't appreciate cold callers (and I include this kind of thing in that). The woman I spoke to had a very thick accent and there was a long delay on the call. I wasn't happy giving any information at all.
The only reason she gave for wanting the information was 'for security'. That wasn't good enough for me.