Yes, you can record sound from the built-in microphone. The app I have seems to record 3gpp @ 8kHz, 12.8 kbit. No idea if you can record with a higher sampling

Yes, you can record sound from the built-in microphone. The app I have seems to record 3gpp @ 8kHz, 12.8 kbit. No idea if you can record with a higher sampling rate. I haven't used it before, but the recording sounds way better than a typical phone call.