Transfer Audio Files from a Windows Computer:

1. Connect the ZTE Grand X 4 to your computer via USB
2. Enable “Media device (MTP)” / “File Transfer (MTP)” at the prompt or from the “Notification” area
3. Launch the File Explorer on the computer
4. Use the Explorer to locate the desired audio files on the computer storage
5. Copy and paste the files on the phone storage, preferably in the “Ringtones” / “Notifications” / “Alarms” directories
6. After the transfer is complete, eject the phone storage via system tray and safely disconnect the device from the USB cord

Change the General Ringtone:

1. Tap “Apps” on the home screen
2. Open “Settings”
3. Scroll to “Device” ad tap “Sound & Notification”
4. Tap “Phone ringtone” and select the desired ringtone
5. Tap “OK” to confirm
6. Optionally, you can enable or disable “Also vibrate for calls”

Change the Ringtone of a Specific Contact:

NOTE: You cannot set custom ringtones to contacts stored on the SIM card or the device’s internal memory.

1. Open “Contacts”
2. Select the desired contact
3. Tap “Edit” > “Menu”
4. Tap “Set ringtone” and select the desired ringtone to use
5. Tap “OK” to confirm

Change the Notification Sound:

1. Launch “Settings”
2. Scroll to “Device” and tap “Sound & Notification”
3. Tap “Default notification ringtone”
4. Select the desired notification alert and tap “OK” to confirm