I read up on this awhile ago but am not sure if anything has changed with the current iOS or the upcoming release. It's my understanding that if you block someone's number now, they will still ring through and can still leave you a message, but you won't hear the call come in and you won't know they left you a message. Does that still hold true? What I need is for the caller to know they are being blocked and for them to be stopped from leaving a message in the first place. I just need my number not to work for them anymore. How is that accomplished via iOS. Is that even possible? I'm on AT&T if that makes any difference.