function unintall_app_by_app_id($app_id)
{
    // Invoke Web Services
    $webServiceAddress = getWebServiceAddress();
    ini_set("soap.wsdl_cache_enabled", "0");
    $client = new SoapClient($webServiceAddress, array('encoding' => 'UTF-8'));
    try {
        $vin = getVIN();
        $param = array('arg0' => $vin, 'arg1' => $app_id);
        $ret = $client->uninstall($param);
        //print_r($ret);
        if ($ret->return) {
            echo "<font color='green'>Application is uninstalling...</font>";
        } else {
            echo "<font color='red'>Application failed uninstallation</font>";
        }
    } catch (SoapFault $exception) {
        print $exception;
    }
    // Synchronize DB
    //$field_name = "INSTALLED_APPS";
    //$apps = get_cimyFieldValue(getVIN(), $field_name);
    /*	$apps = getInstalledApps(getVIN());
    	if (strpos($apps, ',') !== false) {
    		$apps_array = explode(',', $apps);
    	} else {
    		$apps_array = array($apps);
    	}
    	$removed_array = array_diff($apps_array, array($app_id));
    	$size = count($removed_array);
    	if($size == 0) {
    		$result = "";
    	} else if ($size == 1) {
    		$result = $removed_array[0];
    	} else {
    		$result = implode(',', $removed_array);
    	}
    	removeInstalledApp($result);
    	*/
}