If you have a mobile phone, be wary! A few minutes ago I received a call on my mobile phone. No number appeared (not even "private number", it just said "call"). I answered and the other person said "This is so-and-so from Vodafone customer service. Please confirm your postcode and date of birth" I figured that this was to do with a letter I sent them at the beginning of the week, but then it struck me that maybe..... So, I said "What is this concerning?". They hung up. I called Vodafone customer service and told them what had occurred, and they said that no calls to me had been made from them. I have to conclude that this is a phishing scam moved out of the realms of the internet, trying to obtain security details for my phone. Presumably they will use this information to request a new SIM card from vodafone and make calls on your account. So, if you receive a call like this from someone claiming to be your mobile phone provider DO NOT GIVE THEM INFORMATION. Call your provider (191 from a vodafone handset, I don't know the numbers for other networks) and talk to them. If it's genuinely your provider they won't mind you calling them back.