Summary: <p>WhatsApp, recently bought by Facebook for $19 billion, allows its users to text at virtually no cost. How consumers worldwide are using mobile apps to communicate for free and what it means for the future of the telecom industry.</p>
Summary: <p>WhatsApp, recently bought by Facebook for $19 billion, allows its users to text at virtually no cost. How consumers worldwide are using mobile apps to communicate for free and what it means for the future of the telecom industry.</p>