Original post by: Fixmart Laboratory ,
You're absolutely right! Charging socket assembly also contains the main microphone, do a test by making a call and when the speaker mode on the other side should hear you. If on the other phone hear you when you're on speaker mode on your phone then the mic on charging port is not good. You can replace it with the previous microphone if you have the knowledge and equipment to replace it ... or just ask you to replace the part you bought.