Called my mobile at 11am - didn't answer and no message left. I called back from a blocked number (four times) and three times there was a very long delay (approx 13 seconds) then rang normally for about 3-4 rings and then another long delay and then a loud click. All three times identical. Don't think the line is monitored. The fourth time there was the long delay and then it went to the usual message. "The person you have called is not available. Please leave a short message and it will be sent as a text message". Very sus!! Very suspicious indeed!!