WhatsApp to end support for these mobile platforms on Dec 31
Windows Phone: Users can go to WhatsApp> More (the three dots) > chats and calls. Hit backup. The backedup data is saved to your OneDrive account. If you want to export a particular chat with a contact or group, choose the chat > top on more (three dots) > info > email chat history.
“You may not be able to email your entire chat history due to Windows Mail size restrictions. The only way to export newer messages would be to delete older messages and then email your chat history again,” Whatsapp explains.
BlackBerry OS: Just like Windows Phone, select a chat with a group or contact > Select the BlackBerry icon > Email chat. “An email will be composed with your chat history attached as a .txt document,” according to WhatsApp.
BlackBerry 10: To export chat history, select a message with a contact or group > select email conversation > tap send.
-PTC News