I have a problem with Hamer iron - the microphone does not work in it. I exchanged it for another (with Myphone halo 2) and it also doesn't work. Strange that when you blow into the microphone you can hear a blow, but you don't hear any sounds. Assuming a microphone from Hammer 1 (I checked two) you can hear the sound of a speaker with a damaged membrane. It looks like the microphone is broken, but three in a row are unlikely to be broken.
It is soldered on cables, so there is no possibility of overheating when soldering. If anyone has any idea or scheme for the phone I would be grateful. At least the path of the microphone so that I can find some filters, capacitors, etc. I attach a photo of the motherboard:
It is soldered on cables, so there is no possibility of overheating when soldering. If anyone has any idea or scheme for the phone I would be grateful. At least the path of the microphone so that I can find some filters, capacitors, etc. I attach a photo of the motherboard:

