In August 2011 a beta for Nokia's non-smartphone OS Series 40 was added.
Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the Black Berry version, which arrived two months later.
Whats App was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users.
Koum changed Whats App so that when a user's status is changed, everyone in the user's network would be notified.
Whats App 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000.
On February 26, 2016, Whats App announced they would cease support for Black Berry (including Black Berry 10), Series 40 and Symbian S60, as well as older versions of Android (2.2), Windows Phone (7.0) and i OS (6), by the end of 2016.
Whats App was officially made available for PCs through a web client, under the name Whats App Web, in late January 2015 through an announcement made by Koum on his Facebook page: "Our web client is simply an extension of your phone: the web browser mirrors conversations and messages from your mobile device—this means all of your messages still live on your phone".The oldest device capable of running Whats App is the Symbian-based Nokia N95 released in March 2007.In August 2014, Whats App released an update to its Android app, adding support for Android Wear smartwatches.At a keynote presentation at the Mobile World Congress in Barcelona in February 2014, Facebook CEO Mark Zuckerberg said that Facebook's acquisition of Whats App was closely related to the vision.According to a Tech Crunch article, Zuckerberg's vision for was as follows: "The idea, he said, is to develop a group of basic internet services that would be free of charge to use – 'a 911 for the internet.' These could be a social networking service like Facebook, a messaging service, maybe search and other things like weather.Accidents and mishaps are often a part of travelling abroad, and so you shouldn’t forget to cover yourself and your belongings for any eventuality.