No audio during calls unless speaker or earphones are used (After screen repair)

A

AC Question

Hello,

I have a OnePlus One. I scratched my screen few days ago. I decided to buy a screen online and replace it myself (to gain experience and because it is way cheaper). However, after I replaced the screen, I can't here people when I make a call. They can hear me fine. I can only hear them if I use the speaker mode or use an earphone. Everything else seems to be working well. I can play music and everything.

My question is: What hardware piece is causing this issue? I want to open my phone again and fix the issue, but I don't know what hardware piece is causing it. I can listen to music. I don't understand how the smartphone hardware is set up. There must be two different pieces for the speakers and the sound during calls. Can anyone help?

Thank you!
 

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