Whatsapp dominated Brazil.<p>I work at a big government organization. Every department has its whatts group.<p>I know a guy at my state government cabinet. He has several whatts groups (even one with the governor himself).<p>I know a gentleman which is a judge. He has a group with his partner judges and one with his staff.<p>My point is: if whatsapp usage is so pervasive at other countries as it is at Brazil, it will soon, by (physical) social network effect, dominate USA.<p>The alternatives:<p>* Facebook Messenger: too slow. Only one friend of mine uses it.<p>* Telegram: looks and feels like a whatts clone. Some people here seem passionate about inviting friends, but most people I talk about fail to see any advantage in using it. Some people hate it. As a plus, it will SPAM all your contacts when you sign up.<p>* Google Hangout: even I can&#x27;t figure out what this is. Is this SMS or a messenger application. Now my phone has another application called Messenger (from Google). Confuse. No one I know use it.<p>* SMS: too expensive.<p>* Apple Message: only Apple users can use it. People prefer whatts because everyone is there.<p>* Zoiper: got traction, but whatts voice messages killed it.