Transferring Audio Files from a Windows PC:

  1. Establish a USB connection between your LG Optimus L70 and computer
  2. When prompted, tap "Media sync (MTP)" on your smartphone
  3. From the "AutoPlay" window on the computer, click "Open device to view files using Windows Explorer"
  4. Open a second Windows Explorer window and navigate to where the audio files are stored on your computer
  5. Copy the desired files, and paste them on your phone's storage. (NOTE: you should transfer the files in folders such as "Notifications", "Ringtones" etc.)
  6. Once the transfer is complete, click the "Safely Remove Hardware" icon from the system tray
  7. Click "Safely Remove Mass Storage Device" > "OK"
  8. It's now safe to disconnect your smartphone from the PC

Changing the Phone's Ringtone:

  1. Press "Menu" while viewing the home screen
  2. Tap "System settings"
  3. Swipe to "Device" and tap "Sound"
  4. Tap "Phone ringtone" under "Ringtone & Notifications"
  5. Choose the desired ringtone sound, and tap "OK" to confirm

Changing the Notification Sound:

  1. While on the home screen, press "Menu"
  2. Tap "System settings"
  3. Tap "Sound" under "Device"
  4. Tap "Notification sound" under "System"
  5. Select the audio file you wish to use for notifications
  6. Press "OK" to confirm

See More: LG Optimus L70: Personalize with Custom Ringtones and Notification Sounds