To understand the significance of the old Facebook Java app, one must first understand the dominance of Java ME (Micro Edition). Before the duopoly of iOS and Android consumed the market, the mobile operating system ecosystem was fractured. Nokia ruled the roost with Symbian and Series 40, Sony Ericsson offered sleek alternatives, and BlackBerry was the tool of the enterprise. Yet, almost all of these devices shared a common language: Java.
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When Facebook bought Snaptu, they effectively turned it into the official used globally until 2014. This acquisition is often cited as the moment Facebook realized that "next billion users" would come via Java, not iOS. To understand the significance of the old Facebook