"Unfortunately, you won’t be able to use WhatsApp soon because your phone is running an old version of BlackBerry OS."
If you see this message, you are using a BlackBerry device running a version of the BlackBerry Operating System (OS) that WhatsApp no longer supports. Unfortunately, your phone cannot be updated to a supported version of the BlackBerry OS.
To continue to enjoy WhatsApp, we recommend you change to a supported phone. Please read this article to find out which devices are supported by WhatsApp.
We apologize for the inconvenience.
WhatsApp Support Team