This sim menu, the only time I remember using it was on PAYG on Orange to get my credit balance via text message.

I'm now on o2 and I've never used it for anything when I owned a S40 or S60 phone.

I could throw another spanner into the works and say, no mobile phone is a phone, its a mobile radio like a CB or Marine radio. They all use the airwaves there for techincally making them a radio and not a telephone because it doesn't directly plug into a telephone line.