Incoming voice is not recorded using mediarecorder

[Android Central Question]

I have to record calls through my app, its not working in 7.0 and above. I am using mediarecorder to do so. What technique should I use to record both the voices?

 

[B. Diddy]

Welcome to Android Central! Which phone? Is mediarecorder a preinstalled app that came with the phone, or a 3rd party app you installed?