Incorporating the Ergonomic Arc Design, the advanced Asus ZenFone Go 4.5 LTE ZB450KL is designed with a physical rear key that offers an enhanced control. In other words, you can use the rear key for snapping selfies, adjusting the volume and the steps. Weighing only 135 gms, the new ZenFone Go is convenient to hold and use. Incorporating the new ASUS ZenUI, the ZenFone Go ASUS smartphone offers enhanced security and usability. It brings along the advanced ZenMotion feature that offers smart shortcut. The new ASUS Zen User Interface also offers instant updates 24 x 7. Moreover, you also get 100 GB Google Drive Storage for two years, along with this phone.