3 ms·The billionaires at WhatsApp beg to differ. They got very very rich from "mobile non-Android Java".by beat 13y agoThe billionaires at WhatsApp beg to differ. They got very very rich from "mobile non-Android Java".hatred 13y agoIsn't their stack based on Erlang or am I missing something ?cgh 13y agoYou're missing the client side. It runs on J2ME-powered feature phones.krzyk 13y agoAnd on Android (and probably iPhones). Which version was first, J2ME or smartphone one?