Boldbeast Call Recorder for Android V5.1 is released, it includes two versions:
(1) Common version
This version uses only public standard Android functions (API), so it works for all android phones.
(2) Creative version
This version uses some unpublic internal Android functions to fix recording issues, so it is very powerful, it can makes more phones record calls clearly and loudly in two directions. This version works very well for most phones in the market, but it can't work for a few phones because the internal Android functions may be changed by the manufacturer without notification.
Both versions have options to fix recording issues. The Creative version has more options.
Please test the Common version first, if it works well you should use it. If the call recording feature of your phone is limited by the manufacturer and the Common version can't fix it, then please test the Creative version.
Dowload them here http://www.boldbeast.com/android/call_recorder.html