HomoTom HT20 demounting. Solving the problem with the microphone 

We disassemble the device (video is shown) and remove the protection from the microphone.
Next, you need to adjust the values in the engineering menu.
To enter the engineering menu #*#3646633#*#
We list the HardwareTesting tab and then enter values such as in the table (the link to the table below)
drive.google.com/open?id=1OmJ...

Наука