$ cordova plugin add cozzbie.plugin.phonecalltrap

Angular 1: var PhoneCallTrap = cordova.plugins.PhoneCallTrap;
Angular 2: declare var PhoneCallTrap:any;

PhoneCallTrap.onCall(function(obj) {
    
    var callObj = JSON.parse(obj),
        state = callObj.state,
        callingNumber = callObj.incomingNumber;

    switch (state) {
        case "RINGING":
            console.log("Phone is ringing", callingNumber);
            break;
        case "OFFHOOK":
            console.log("Phone is off-hook");
            break;

        case "IDLE":
            console.log("Phone is idle");
            break;
    }
});