wpcf7 redirect

add_action( 'wpcf7_before_send_mail', 'wpcf_redirect' );
function wpcf_redirect(){
    global $post;

    if (wp_is_mobile() ) {

        $permalink = 'http://www';
        $wpcf7 = WPCF7_ContactForm::get_current();
        $wpcf7->set_properties(array(
            'additional_settings' => "on_sent_ok: "location.replace('".$permalink."');"",
        ));

    }

}