TOYOTA 2012 Avalon - Manual (Page 320)

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3-4. Using the hands-free system (for cellular phone)
Selecting a phone number from outgoing or incoming call history
STEP2-1 Select “Call History” by using a voice command or
.
STEP2-2 Select “Outgoing” or “Incoming” by using a voice
command or .
STEP2-3 Select the data to be registered by either of the fol-
lowing methods:
a. Say “Previous” or “Go back” until the desired
data is displayed, and select “Confirm” by using
a voice command.
b. Select the desired data by using .