While creating a new contact or editing a contact's details in
People, you can add an extension number to their number so you can skip the voice prompts when calling.
After entering the number of the main line, tap the
*# key on the keyboard. Then do one of the following:
Pause to insert a pause before the phone dials the extension number. To insert a longer pause, enter
Pause several times.
Wait to be prompted to confirm the extension number.
Enter the extension number.