WhatsApp users are now making more than 100 million voice calls every single day – over 1,100 calls per second. That’s an impressive number, given the feature only finished rolling out to Android and iOS in April of last year. Of course, plenty of those calls are from individuals who make multiple calls per day, but it still shows how quickly WhatsApp’s 1 billion users have jumped on the feature. For comparison, Skype only has about 300 million active users per month, so it’s not a stretch to imagine WhatsApp has already surpassed the number of daily Skype calls (a figure Skype doesn’t make public). Not bad,…

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