WhatsApp will stop working on devices running Blackberry OS, BlackBerry 10, and Windows Phone 8.0 and older from December 31st, 2017. It is not good news for some smartphone users. The WhatsApp blog post with end-of-life dates clearly mentions that users of BlackBerry OS, BlackBerry 10, and Windows Phone 8.0 and older operating systems will not be able to use the app after December 31,