Sorry, I didn't explain better:
When using a stereo headphone adapter in the ADP1, when the headphones are plugged in, despite the lack of any external microphone, the internal microphone is deactivated.
This prevents the phone from being used as a car phone; I have my ADP1 on a windshield mount with audio routed via headphone adapter to double-male cable to car stereo input. If the internal mike was still operational, it would allow the phone to be used as a hands free car phone. (Without the need for bluetooth)
Is there any app that can be used to prevent the microphone from auto switching off?