Just in case you had forgotten, WhatsApp will be dropping support for devices running on BlackBerry OS, BlackBerry 10 and Windows Phone 8.0 and older devices on December 31, 2017. Starting next year, you will not be able to use WhatsApp on these platforms.
Earlier this year, WhatsApp confirmed its plans to sunset the BlackBerry and Windows Phone versions of the service. The company also announced deadlines for other platforms. Nokia’s Series 40 devices, for example, will be supported till December 31, 2018 while Android 2.3.7 and older devices will be supported till February 1, 2020.