The famous instant messaging app, WhatsApp has announced that more than 100 million voice calls are made every day on WhatsApp, which is over 1,100 calls a second.
WhatsApp introduced the voice calling feature in March last year on Android, followed by iOS and Windows. The voice calling uses a data connection to place a call, whether over Wi-Fi or mobile data. A single WhatsApp call consumes around 1.3MB of data per minute. [...]