Rang back & straight away got message, "The number you have dialled is not in service. Please check the number and try again." Number is as showed up on my mobile.

Caller: They Hang up on answering

They Hang up on answering

They rang and hung up as soon as I answered. This is the second such call I have received today and I have been getting them on a regular basis for months; about five a week. I cannot see the point in doing this (ringing and hanging up) other than to ascertain that my number is valid. What they do next I don't know. I tried to block their number but it came back as being invalid. What more proof do you need to confirm that this is a scam caller (that might have other implications).

They have been calling me several times a day for the past few days, and never leave a message.