ASUS introduced three new colorful smartphones at CES 2014 today: ZenFone 4, 5, and 6. The numbers following the name are the size of the display. All three of the phones run Android 4.3, soon to be updated to Android 4.4, and feature ASUS’ ZenUI overlay.
ASUS. (2014, January 6). ASUS Celebrates In Search of Incredible Brand Spirit at CES 2014. ASUS Press Release. Retrieved January 6, 2014, from http://press.asus.com/release.php?id=34#.UssfF9yDBsU
Howley, D.P. (2014, January 6). ASUS ZenFone 6, 5 and 4 Debut with Intel Atom CPUs, Colorful Designs. Laptop. Retrieved January 6, 2014, from http://blog.laptopmag.com/asus-zenfone-6-price-specs
Pierce, D. (2014, January 6). Asus launches the small PadFone mini, and ZenFones of all colors and sizes. The Verge. Retrieved January 6, 2014, from http://www.theverge.com/2014/1/6/5279146/asus-launches-padfone-mini-and-zenfone-4-5-6