1

Hello,
You claim that your app is the only one on the planet which can provide proper recording of bluetooth calls on my phone. I tried several different params, tunings etc. (eg. those from note 3) but still without success.
What should I do to get it right?

2

Galaxy Note2, for example GT-N7100, GT-N7105 etc use the WM1811 audio chip, the hardware doesn't support bluetooth recording, so there is no solution even if you root the phone.

Some Galaxy Note2 variants, for example SGH-T889V etc use the MSM8960 chip, the hardware supports bluetooth recording, but the ROM doesn't support it. Boldbeast Recorder can fix the problem. You should root the phone, enable the "Change Audio Controls" option in the app, then you can record calls perfectly via bluetooth. The option is visible only after you root the phone.