Earlier, WhatsApp had tested out the voice calling service via an invite system for certain users in India, and those who received it, claimed that they manged to invite some friends by physically calling them via WhatsApp.
Users who opted to test the feature are redirected to another website and are asked to participate in a ******. After completing the ******, they are asked to download multiple third-party applications, which run the risk of spreading malware on smartphones.
You don't even get redirected to anything.
I got an invite like that so now I can invite you guys, by call.
Please stop whine and read first, before you say things