Erratic voice of iPhone 5S

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Sanjeev

Member
Bronze
Mar 17, 2012
166
4
18
#1
The voice of my iPhone 5S goes down and up again stay down for a while and get normal again. It happens only when I play music or radio apps. Why it is so?
 

Sanjeev

Member
Bronze
Mar 17, 2012
166
4
18
#4
Alerts or notifications coming in when this happens?
I understand when alerts and notifications come speaker volume goes low. But not in my case. Volume itself goes low and stays low. May be some hardware problem. But most of the time volume remains normal. It happens sometimes in between.