1.0Fast2SMShttps://www.fast2sms.com/helpFast2SMShttps://www.fast2sms.com/help/author/poorvi/rich600338<blockquote class="wp-embedded-content" data-secret="5ydxTcKkaE"><a href="https://www.fast2sms.com/help/flash-sms/">What is Flash SMS, why to use and how to send it?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.fast2sms.com/help/flash-sms/embed/#?secret=5ydxTcKkaE" width="600" height="338" title="“What is Flash SMS, why to use and how to send it?” — Fast2SMS" data-secret="5ydxTcKkaE" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> Simple and easy way to understand about Flash SMS. With Fast2SMS you can send Flash SMS and in this article we mentioned exact steps that how you can send bulk, promotional, OTP and transactional Flash SMS from our website.https://www.fast2sms.com/help/wp-content/uploads/2018/04/Flash-SMS-icon.png