Do you have a screen protector attached to the iPhone itself?
Place a anti glare screen protector on your iPhone first and it should fix any issues.
Works perfect on mine and two of my kids.
For the 5s? Because her sound is fine.I got the nuud also but everyone said they couldn't hear me.
No the 5.
Yeah the 5 had that issue. It's fixed for the new 5s version.
The nuud was way to expensive.
Tapped out on my iPhone 5