TOYOTA 2011 Prius - Manual (Page 377)

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3-3. Using the hands-free system (for cellular phone)
3
Interior features
PRIUS_U (OM47685U) DVD
Using the call history memory
Follow the procedure below to use a number stored in the call history
memory:
Press and say “Redial” (when using a number stored in
the outgoing call history memory) or “Call back” (when using a
number stored in the incoming call history memory).
Select the number by either of the following methods:
a. Say “Previous” or “Go back” until the desired number is
displayed.
b. Select the desired number by using .
STEP 1
STEP 2