how to disable emergency call on IOS7.1.1
I have this problem with my Iphone4 on IOS7.1.1. One fine day without i realize my kid played with the phone while in the locked mode. Since i know the phone is locked, i didn't bother to look what they were doing. Now I realize the potential problem, that when they play with the phone they started to click on emergency button and started to press random number on the keypad. Last month billed it start to hit my pocket. Below picture some of the number that were made.
Question : How do i disable or get rid of the emergency call on the locked button.
iPhone 4, iOS 7.1.1