To use the speed dial feature on this phone you have to follow these steps:
Go to MAIN MENU > SETTINGS > PHONE SETUP > SPEED DIAL (OPTION 7)
If it is off, turn it on with option 1
Then go to option 2 SET NUMBER
and edit the empty field corresponding to the number you want to press to speed dial.
The numbers must be on your address book because it selects them from there.
Once done, when you go to the dial screen with the numbers keypad, you just select the one corresponding to the speed dial marked before and then press the phone key.
Or just keep pressing the number with the speed dial desired.