angular.service("dataService", function() {

    this.value1 = "";
    this.value2 = "";
});

angular.controller("myCntrl1", function($scope, dataService) {
    $scope.dataService = dataService;
});


angular.controller("myCntrl2", function($scope, dataService) {
    $scope.dataService = dataService;
});

// Controller 1 view
    <div ng-controller="myCntrl1">
        <input type="text" ng-model="dataService.value1" />
    </div>

    // Controller 2 view
    <div ng-controller="myCntrl2">
        The value entered by user is {{dataService.value1}}
    </div>