You must create a empty file that is called MR_Rec.amr then connect a headset, go to the radio and choose Track-id and while you waiting "Selection of sample music" click activity and then press the button c (the sone you connect to xs++ 3.1 etc) and then go to the rec folder on the memory card, listen to the radio and records rejoice.

the .amr file must be "attribute and the "read-only"