Hello, Whatsapp is most backward application because most needful features are not available. ( 1) No Data safty & security if phone damaged or lost ( 2) Need online auto backup in whatsapp as Telegram app, Hangout [ need cloud storage, not phone storage for file saving ] ( 3) All types files attachments for sharing ( 4) Different derive use with I whatsapp No. as telegram ( 5) Need computer application as other applications [ Telegram, Hike, Viber ] ( 6) More No. registration in whatsapp app as gmail app.