I agree, I'm not at all sure how they plan on doing that. VoIP I can understand, and most contracts/plans also ban "SMSoIP", but Whatsapp is something different

I agree, I'm not at all sure how they plan on doing that. VoIP I can understand, and most contracts/plans also ban "SMSoIP", but Whatsapp is something different. For the longest time I had a phone with rockbottom SMS rates sitting at home that I used a webinterface for to send messages cheaply.