For those has problem in recording telephone conversation on SGS2 can try this patch, I am using Leomar GB 2.3.4 ROM with this CWM-patch taken from Chinese ROM. Good 2way voice quality using Ultimate Voice Recorder 2.71 other telephone recording s...
This is DXJFB modem in CWM
This audio lib should help you to record both in BT, speaker or handfree
Have you try this mod with Ultimate Voice Recorder? It works very well