dette.js

function getMacAddress() {
    var myFakeResponse = {'0000000000000000'}
    var deferred = $q.defer();
    var promise = TvStateService.getNetworkStatus();

    promise.then(
        function success(response) {
            deferred.resolve(response);
        },
        function error(e){
            deferred.resolve(myFakeResonse);
        });
    return deferred;
}

er_det_samme_som_dette.js

function getMacAddress() {
  return $q(function(resolve, reject){
    TvStateService
      .getNetworkStatus()
      .then(resolve, function(e){ resolve({'0000000000000000'}); });
  });
}