Q: iOS 9 for 5s is not accessing touch for calling icon and its operations.. Temne the solution

Hey Bharathk14,

I understand that the touchscreen on your iPhone is not working as expected and you notice when making phone calls. Let's see if we can get that sorted out.

I would first take a look at the article below for some simply troubleshooting. If after cleaning the screen, ensuring that nothing on the display that would interfere with its use and restarting your iPhone, you may need to contact Apple Support for further assistance. 

If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch
https://support.apple.com/en-us/HT201406

Take it easy