Why does the microphone not work with the speakerphone, but does it work in the normal one?

Question

Electronics

Dear Gurus, help with advice.
Alcatel OT Idol S 6035
OS and firmware: Android 4.4 original
Description of the problem:
Calls and conversations are fine, but when I switch to the speakerphone or make a speakerphone call, the interlocutor does not hear me.
Skype, Viber and just hands-free phone calls the microphone does not work.

Answer 1

Because in modern phones, the microphone is not 1. at least 2 or 3. One of the microphones is responsible for speakerphone, it also provides noise reduction during normal conversation.
So he either clogged with mud or died. Alternatively, the rubber band that presses the microphone to the phone body can still slip and block the microphone hole.

Answer 2

With this question, it is better to contact w3bsit3-dns.com