Default cannot work due to technical reasons

yep, I had the same kind of soft on my symbian, it was called Advanced Call Manager (ACM). The same soft exists for Android, so I tried it, but no answering machine on the Android version. I asked the developer team, and they told me it's not possible on Android.

this is confirmed by several posts
forums.whirlpool.net.au/archive/1533213
groups.google.com/group/android-developers/browse_thread/thread/e8904c82a2c4a333?pli=1[/url]

it's the only feature I miss since I switched over from my symbian phone