Find "Settings"
Press the menu icon.
Press Messaging.
Press the Menu key.
Press Settings.
Activate or deactivate request for delivery reports
Press Delivery reports below Text-message (SMS) settings to activate or deactivate the function.
If you activate request for delivery reports, you will be notified when your text message has been delivered.
When the box next to the menu item is ticked (V), the function is activated.
If you activate request for delivery reports, you will be notified when your text message has been delivered.
Exit
Press the Home key to return to standby mode.