Detect the operator message during call in android

Generally whenever an outgoing call is made, if the receiver number is switch off, dialer will hear "number is switch off", or if the receiver is talking with some other person, dialer will hear "number is busy", etc. I want a package which detects following call state when the outgoing call is made and network opearator says some message- Toast "busy" when the operator alert "number is busy". Toast "switch-off" when the number is switch off. Toast "line-busy" when the receiver is talking with someone while dialing. Toast "outside coverage" when the receiver is out of coverage. Toast "incorrect" when the dialer dials an incorrect number Toast "Noti" when the operator sends rest messages like "low balance, offers", etc. For example person X calls person Y, if person Y number is switch off, person X will hear that "Number is switch off" from opearator, so I want to detect what the operator says while dialing a number.