I am very frustrated with this App from SMSROBOT LTD. It worked, then it stopped recording both sides and now I can't hear any voices. Any suggestions what I may be doing wrong?
Apps tend to have issues because of unknown reasons. For example, an update to your Android phone could cause errors to the application, therefore the app needs new update to work properly in case you have updated the Android version on your phone. However, try re-installing the application on your phone and then repeat the procedure. If it still gives you errors, pick another one from the Play Store. Use the link below to pick another application.
Play Store search results: https://play.google.com/store/search?q=call%20recorder&c=apps&hl=en