Transfer Audio Files from a PC:

  1. Connect the Android device to your computer via USB
  2. Enable “media device” / “File transfer” when prompted or from the “Notification” area
  3. Open the File Explorer on the computer
  4. Locate the audio files on the PC storage
  5. Copy and transfer the files on the phone storage, preferably in the “Media” folder
  6. Once the transfer is complete, eject the phone storage via system tray and safely disconnect the device from the USB port

Change the General Ringtone:

  1. Open “Settings”
  2. Scroll to “Device” and tap “Sound & Notification”
  3. Select the desired ringtone
  4. Tap “OK”
  5. Optionally, enable or disable “Also vibrate for calls”

Change the Ringtone of a Specific Contact:

NOTE: Custom ringtones cannot be assigned for contacts stored on the SIM card or the phone’s internal memory.

  1. Launch “Contacts”
  2. Tap and hold the contact whose ringtone you want to change
  3. Tap “Edit” > “Menu” > “Set ringtone”
  4. Select the desired ringtone and tap “OK”

Change the Notification Sound:

  1. Open “Settings”
  2. Scroll to “Device” and tap “Default notification ringtone”
  3. Select the notification sound you want to use
  4. Press “OK” to confirm

See More: Verykool Crystal: Transfer Audio Files from a PC and Set Custom Ringtones & Notifications