If you are among the few remaining users to rely on a Symbian-powered smartphone, we have some bad news for you - WhatsApp will stop working by the end of this year. A popup message now appears to every WhatsApp users on Symbian OS: Unfortunately, you won't be able to use WhatsApp after 31/12/2016 because WhatsApp will no longer support your phone. It seems WhatsApp will be retiring its Symbian-dedicated servers and thus the app will no longer work after that. While it is a sad moment, we have to still applaud WhatsApp for its prolonged support for Symbian OS. WhatsApp's departure...
Source: http://www.gsmarena.com/whatsapp_drops_support_for_symbian_app_to_stop_working_on_dec_31-news-19328.php