Ionic using ng-model cann't get value in mobile App

Hi Guys, This is vinodh. i am learning ionic.

I try to image click get the value and display text Box under i keep button when i click button play sound.

This is My Task. i get the all values and display in text box. after Run web Browser Perfectly getting value and show in text box See Second Image Text Box. But As The Same app Build and Run mobile click image but text not show in text box. BUt Web Browser is woring Good.