In case you are no able to use WhatsApp on your Nokia X, Nokia X+ and Nokia XL, here we are providing a working solution in “step by step” manner with latest WhatsApp Plus version to use. It has worked for even those, who are not able to register.
1) Download older version of WhatsApp. You can download and try version 2.11.205 from here
2) Clear app data (go to settings > apps > WhatsApp > clear data)
3) Change date to 3rd June 2014 (go to settings > Date and time > uncheck “automatic update of time”),
4) Reboot the phone and you should be able to register and use WhatsApp. Only that your messages will be backdated.
5) Uninstall Whatsapp now
6) Set time to present date
7) Install WhatsApp Plus from here