When someone calls me and I accidently hit the don't answer call button on the phone, The person on the other end of the phone gets the message. The number you have called is not recognised as if the number does not exist. Surely that is the wrong message. I have tried this myself from my landline and also another mobile and I got the same message. Surely it should say something like the number is not currently available please try again later. I have tried the same with another mobile and it just hangs up the call and does not give any message.