Re:WhatSim, a SIM Card for WhatsApp
by MatthewWilkes on Thursday January 29, 2015 @07:57AM
(#8965787)
It really feels to me that they're providing a mobile front end to whatsapp, not free connection to whatsapp. I guess it would route messages as texts and MMS.
http://en.wikipedia.org/wiki/Multimedia_Messaging_Service
Edit: apparently not. The FAQ page states the SIM works only for Whatsapp, not for texts.