WhatsApp will stop working on all devices running BlackBerry OS, BlackBerry 10, and Windows Phone 8.0 and older from 31 December 2017.
In a recent post by WhatsApp indicating the end-of-life dates clearly mentions that users of BlackBerry OS, BlackBerry 10, and Windows Phone 8.0 and older operating systems will no longer have the privilege of using the app after 31 December 2017.
If your phone has any of the two specified operating systems, you should consider upgrading to a newer phone in order to access WhatsApp properly. WhatsApp updates for other OS versions like Windows Phone 7, Android 2.1, Android 2.2, and iOS 6 were stopped in 2016.
