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I have Flexispy installed on samsung galaxy M31 (unrooted) android pie 10 version. I have enabled call recording option and I am receiving recorded files on dashboard but problem is these files (.AMR extension) does not have any sound in it. It plays for whatever call duration but no voice from both the sides. I checked all the audio recording source options one by one and tried call recording by calling on target phone but it did not worked on any source. I played all these downloaded files on different different media players including vlc player but still I could not hear anything. Can someone please let me know how I can resolve this issue. Thanks in advance!