app/assets/javascripts/devise_authy.js
$(document).ready(function() {
$('a#authy-request-sms-link').unbind('ajax:success');
$('a#authy-request-sms-link').bind('ajax:success', function(evt, data, status, xhr) {
alert(data.message);
});
$('a#authy-request-phone-call-link').unbind('ajax:success');
$('a#authy-request-phone-call-link').bind('ajax:success', function(evt, data, status, xhr) {
alert(data.message);
});
});