Be careful its not a Sales ploy, I used to have a range of 07 numbers call my mobile at least once a week, everytime I went to answer it hung up.

I then got told about Companies who think youŽll call the number back to find out who it was and charge premium rates to the bill payer, so I rang one back from my work phone and it went through to a call centre, since then if I miss a call, they can call me back