Transfer Audio Files from a PC:

  1. Connect the Android device to the PC via USB
  2. Enable “File Transfer” / ‘Media device” on the phone, when prompted or from the Notification area
  3. Launch the File Explorer on the computer and locate the desired audio files on the PC
  4. Transfer the files to the phone storage in the “Ringtones” and/or “Notifications” directories
  5. Once done, eject the phone storage and safely disconnect the device from the USB port

Change the General Ringtone:

  1. Open “Settings
  2. Access “Sound & Notification
  3. Select the desired ringtone and tap “OK
  4. Optionally, turn “Also vibrate for calls” ON or OFF

Change the Ringtone of a Specific Contact:

NOTE: You can’t set custom ringtones for contacts located on the SIM card or the device’s internal memory.

  1. Launch “Settings
  2. Tap and hold the desired contact then tap “Edit
  3. Tap “Menu” > “Set ringtone
  4. Select the desired ringtone and tap “OK

Change Notification Alert Sounds:

  1. Open “Settings
  2. Access “Sound & Notification
  3. Tap “Default notification ringtone
  4. Tap the desired notification alert
  5. Press “OK” to confirm

See More: Karbonn K9 Music 4G: Transfer Audio Files and Assign Custom Ringtones & Notifications