I just had a random phonecall from a mobile number (number displayed as normal, but I do not recognise it). The caller sounded female and Scottish, and when I said "Hello?", (I don't give my name and number when I answer a call, I just say hello) they asked who was there on the end of the line??!?
I told them they had called me, and they then said sorry they must have the wrong number. I said that yes, they must do, never mind, and they hung up.
What do you suppose - just very odd wrong number or scammer?