I bought the Nokia Asha 202 last month and up till this morning, I have not been able to successfuly download Whatsapp Chat Messenger to the dual SIM s40 Nokia phone.
If you also facing similar problem, please, do not over stress yourself. Nokia Asha 202 is not yet in the list of Nokia java s40 phones supported for Whatsapp download as at the time of publishing this post. You can check out the list of Nokia s40 devices supported by Whatsapp.
I hope in the future Whatsapp updates, Whatsapp for Nokia Asha 202 will be available. I am enjoying 2go chat messenger on the Nokia phone. If interested, you can download 2go for Nokia Asha 202.
You might also be interested in the list of Nokia Symbian phones.