WhatsApp launched in 2009 for iOS and quickly moved to Android. However, in emerging markets like India, Brazil, and Indonesia, the majority of users could not afford smartphones. To capture this massive user base, WhatsApp Inc. developed a of their app.
In 2010, WhatsApp's founders decided to migrate the application to Java, a more powerful and versatile platform. Java was (and still is) a popular choice for Android app development, and it offered many advantages over J2ME, including better performance, improved security, and access to a wider range of libraries and tools. Whatsapp java j2me
J2ME WhatsApp had no ads, no reels, no channels, no stories. It was pure SMS-style texting. WhatsApp launched in 2009 for iOS and quickly
If you must use a very old Java feature phone: in emerging markets like India