I dont usually answer any calls from unknown numbers but I was expecting an old school friend to call so I answered the call from 0422 708 934. There was a lot of noise in the background (call centre) and people talking in a language I couldn't understand. I am not sure if they could hear me, or if they were talking to me or someone else beside them but after a couple of hellos when they didnt respond I hung up - and blocked the number.