HTC Desire HD
Find "Settings"
Press arrow up to access the main menu.
Press Messages.
Press the Menu key.
Press Settings.
Save the message centre number
Press Service center.
Key in +447785016005 and press OK.
Turn request for delivery reports on or off
Press Delivery reports below SMS settings to turn the function on or off.
If you turn on request for delivery reports, you'll be notified when your text message has been delivered.
When the box next to the menu item is ticked (V), the function is turned on.
If you turn on request for delivery reports, you'll be notified when your text message has been delivered.
Exit
Press the Home key to return to standby mode.