It may be fun to automatically dismiss devices like this but I find these to be an attractive option. They look smart too (I’m heavily invested in iOS but a part of me wants to see Nokia succeed). From the BBC:
The feature triggers the cross-platform messaging app which offers a free alternative to SMS texts.
HTC and Nokia have previously released handsets with Facebook-devoted buttons, but this marks a first for WhatsApp.
Analysts suggested the move would make WhatsApp the text app of choice on the handsets, but suggested it would have limited impact on the wider mobile phone market.