How much do WhatsApp voice calls actually cost?

How much do WhatsApp voice calls actually cost?

Sure, WhatsApp voice calls are theoretically free, but the internet itself is not. If you’re sitting in a cafe sucking up free Wi-Fi then there is no cost involved at all, other than the overpriced Chai latte you’re probably sipping. But if you’re using your own data connection then you will of course be spending money in the form of data allowance when you make WhatsApp calls.