How can you turn up the in-call volume of the receiver (ear piece) on the iPhone, if the side "up button" is broken?
The volume of the earpiece is down to the very low and I can't seem to find a way that can reverse this situation, as my side button that increases it, is not working. I found how to increase the speaker volume, the ringer volume and headset volume without the side buttons, but nothing for the earpiece. Can anyone provide some help? Is there any app that can do this?