crf Try disabling the default recorder with adb 'adb shell pm disable com.package.name'

also
the 2nd problem
when I click App settings or Call Settings or Memo Settings, it pops up "Unfortunately, Boldbeast Recorder ha stopped"

crf run adb shell pm list packages boldbeast

ok
it replied:
package:com.android.cts.boldbeast.recorder

    crf oh wait i forgot. wrong command. Run adb shell pm list packages record and adb shell pm list packages callrecorder

    pm list packages record:
    replied
    package:com.android.cts.boldbeast.recorder
    package:com.lge.voicerecorder

    pm list packages callrecorder:
    replied nothing

      crf You can try disabling com.lge.voicerecorder 'pm disable com.lge.voicerecorder', but im not sure its what you need

      I got this reply:
      Error: java.lang.SecurityException: Permission Denial: attempt to change component state from pid=2565, uid=2000, package uid=10029

        crf you need to only disable user as in, adb shell pm disable-user --user 0 package_name

        pm disable-user --user 0 com.lge.voicecommand
        replied:
        Error: java.lang.SecurityException: Permission Denial: attempt to change component state from pid=13474, uid=2000, package uid=2901

          crf weren't you doing voice recorder?

          here is a copy/paste of the shell
          shell@gf2:/ $ pm disable-user --user 0 com.lge.voicerecorder
          Error: java.lang.SecurityException: Permission Denial: attempt to change component state from pid=19926, uid=2000, package uid=10029
          1|shell@gf2:/ $