Transfer Audio Files from a PC:

  1. Connect the Android device to the computer via USB
  2. Enable “Media device” / “File Transfer” at the prompt or from the Notification area
  3. Launch the File Explorer on the computer
  4. Locate the audio files on the PC storage
  5. Copy and transfer the desired files to the phone storage, preferably in the “Media” directory
  6. After the transfer completes, eject the phone storage via system tray and safely disconnect the phone from the USB port

Change the General Ringtone:

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

Change a Specific Contact’s Ringtone:

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

  1. Open “Contacts”
  2. Tap and hold the desired contact
  3. Tap “Edit” > “Menu” > “Set ringtone”
  4. Select the ringtone you want to assign
  5. Press “OK”

Change the Notification Alert Sound:

  1. Launch “Settings”
  2. Access “Sound & notification”
  3. Tap “Default notification ringtone”
  4. Tap the notification alert you want to use
  5. Press “OK” to confirm

See More: ZTE Avid 4: Transfer Audio Files from a PC and Set Custom Ringtones & Notification Alerts