I emaild skvalex, creator of Call Recorder
The answer was: "CallRecorder doesnt support your phone*"
wow thanks, but I still don't know why. If it's a hardware problem, or just lazy programmer that don't want to write a patch for the kernel.
1.11.18 MIUI Brainmaster, KelLMSKing MIUI 2.8.1/2.9.5, MIUI Galnet GB 2.2.10
Flash, 10 minute stablization, reboot, test.
(Thx for my bro's Galaxy S)
That three MIUI has REC button during call(both in/out), but disabled(inactivated).
My NS' battery is almost out, so my tests are over for now.
(Writing in internet club, but no one has usb data cable!)
Sorry for bad result bros
Maybe next time Ill try more, if i dare