What's happening to WhatsApp, and how to stay safe

Experts say WhatsApp should stop allowing sign-ups from virtual phone numbers and find a way to block websites that generate these numbers. — AFP

Once an innovative instant messaging service, WhatsApp today offers businesses one of the most effective ways to reach users. But, like text messages and calls, expansion has come with spam and scams. What's happening to Whatsapp? How can we stay safe? Mint explains:

Now what's up with WhatsApp?