ceene, Big Thanks for your effort! Yappari was great app as long it worked.

BTW I think so WhatsApp could recognize "wrong" phone model by the IMEI code. I don't know about WA protocol, but I think so I have seen the IMEI code in some official WhatsApp client's configuration menu. I don't either know if Yappari will send the IMEI code to WhatsApp server. Just guessing.