How is SMS too expensive? At least in the US all the common plans come with unlimited SMS&#x2F;MMS<p>I use Whatsapp to connect with my brother-in-law in Costa Rica and his family and thats it.<p>Everyone else in the US I use group messages with. There are probly 6 or 7 group message groups I use on weekly basis and more I use less frequently.<p>There isnt really a reason to switch from group messages to whatsapp. Especially if all the participants have an iPhone it makes things easier. I have several Android friends as well and we use group messages together.