I have a hardware accessing question. For a project, I was wondering if it would be possible to use the smartphone's speaker as a second microphone, similar to the idea that you can plug in a headset ...
Is it possible to just use a headset's mic but keep the phone's ear-speaker active?
When you call someone who is online via Google Talk, it use the back speaker in loud mode. Is there a way to use GTalk for calling like a regular phone call?