Toyota Sienna 2010 Owner's Manual page 336

3-4. Using the hands-free phone system (for cellular phone)
Dialing by inputting a number
Press
STEP 1
Press
STEP 2
Dial by one of the following methods:
STEP 3
a. Press
b. Press
c. Select "Dial" using
340
and say "Dial by number".
and say the phone number.
.
and say "Dial".
.