You will need your six digit "Agent Code" to update the phone number that displays on the screen in the case of an entry error.
Type agent code then press the [Enter] button.
You'll see the current time setting scroll across the screen.
Wait 5 seconds until the screen says Select CMD: at the top.
Press the  button to go to the Agent Code section then press the [Enter] button.
Update the phone number then press the [Enter] button.
Press the  button to exit.
Check out the collection of articles below for more resources around lockboxes: