In a lot of countries the majority of phones plans work on a prepaid credit system and every text you send eats up X amount of credits. You can send an unlimite

In a lot of countries the majority of phones plans work on a prepaid credit system and every text you send eats up X amount of credits. You can send an unlimited amount of messages and videos on WhatsApp for free if you have access to the internet. Phone calls eat up even more credits, but you can make as many as you want on WhatsApp.