access element in an array

I have a controller function as follows

function UserDetailsControl($scope, $routeParams, UserService) {
    $scope.user = UserService.get({id: $routeParams.id});
    alert($scope.user.phone);
}

When i access the user variable in templates it looks something like the following:

{
  "website_name": null,
  "email": "Monroe@Chamorro.com",
  "first_name": "Monroe",
  "id": "31",
  "last_name": "Chamorro",
  "phone": 2147483647,
}

but alert($scope.user.phone); this always returns undefined. why ? No matter what element i try to access it always returns undefined.