You can change message notification settings and select whether to enable message delivery reports.
To change your message notification settings
- Find and tap Settings > Sound > Notification sound.
- Select an option or tap and select a music file that is saved on your device.
- To confirm, tap DONE.
To enable or disable delivery reports for outgoing messages
- Find and tap .
- Tap , then tap Settings.
- Tap the Delivery report slider to enable or disable the function.
After delivery reports are turned on, a check mark is displayed for messages that have been successfully delivered.