So what the solution for amplifer the microphone when a use the phone ?

after a factory reset i have the same problem. os version: p6000-blackview-v0.1-20171021 the microphone is ok with the handfree but when i want to call normaly no. That's not the firt time i have this problem with android phone. The solution is activate AMR Wideband but i need to be rooted. do you h...

i take the last update for my phone and after the microphone wasn't amplifier.
i can change this with:
http://jtgeek.com/tuto-augmenter-le-vol ... -mediatek/


but that's my new phone and...that's your job.
So what the solution?