The sound of mic piece is so low when Im calling my friend can`t hear me in the other line pls help

Hello Sir ! I had the same problem in my cell 2 days ago i took it to the nearest mobile shop and inspite of telling them to replace the mic i asked them to wash the cell. they just washed it with some chemical and mic was good afterwards.
but before doing that plz check that your call volume is on. make a call and press the volume up key. if the volume is high then please get your mic checked.
Thanks

This could be due to one of a few possible problems. Your microphone may be broken or cracked. This is not really fixable and may be due to dropping the phone. It may be due to water damage, which also is not fixable. There is a small chance that it is due to software issues. I would bring it to the nearest store location of your phone provider and see if they can tell you what the problem is. If it is something that can't be proven to be your fault, then they will probably replace the phone free of charge!

Hope this helped! Please rate my solution!
- Frankie

See whether
1) you have Microphone Volume settings on your phone
2) you have gunk stuck in your microphone (lint, etc., from keeping phone in pocket)
3) it's your friend's phone that's got problems. Try to replicate the problem calling other numbers.