Why is the caller volume so low on the phone?

[AC Question]

why is the caller volume so low on the phone

when the caller is on the phone he can hardly be heard. he is very low

 

[Rukbat]

Re: why is the caller volume so low on the phone

All callers? Turn up the volume while you're on a call. (If you're not on a call, the volume buttons are ringtone volume.)

One caller? His phone - maybe lint or dirt in his phone's mic hole.