Check on this page if you phone is supported: https://faq.whatsapp.com/
Edit: Seems that your phone is supported. Maybe you can try this procedure: https://faq.whatsapp.com/
Buno, Modo CS-CCM
L'urgent est fait, l'impossible est en cours. Pour les miracles, prévoir un délai...
The urgent is done, the impossible is underway. For miracles, envisage a time ...