Using 0.28 from https://github.com/fventuri/x6100-buildroot/releases/download/20250120/sdcard-20250120.zip
After ATU tuning, [Play] recorded messages in [MSG2:2] menu produces NO speaker output. [Send] recorded message produces nothing on X6100 screen, but outputs overloaded noise/broom to antenna. "Press and Hold" Lock button restores proper functionality.?