Charlotte Peet, 32, who has worked for Al Jazeera, the Times and the BBC World Service, has not been seen or heard from since ...

After heading back to London, she returned to Brazil last November [and] on February 8 she contacted a female friend in Rio via WhatsApp. “She said she was in São Paulo and was planning to head ...

WhatsApp has 120 million active users in Brazil, which has a population of 210 million, making it the app's second-largest market behind India. 99 has about 20 million customers registered with ...