I am wondering this as well. I found one that worked on my LG Spectrum and things were flawless. Personal Call & Voice Recorder, the free version to boot. It was running well on my Spectrum with Android version 2.0.4 I believe I had. I had upgraded to ICS (4.0.4) and it did not work anymore! I went through about 50 different apps, testing them out over like 3-4 days. Finally found one that worked. Manage Your Calls Free. It was working extremely well, voice quality was amazing! I accidentely uninstalled it and then put it back on. For some reason, it didn't work anymore. If anyone knows of an app out there...PLEASE HELP!!!