Toyota Prius 2011 Manual page 354

3-3. Using the hands-free system (for cellular phone)
The following operations can be performed:
Dialing: Press
.
Storing the number in the phone book: Select "Store" by using a
voice command or
Deleting: Select "Delete" by using a voice command or
Call history
■
Up to 5 numbers can be stored in each of the outgoing and incoming history
memories.
When talking on the phone
■
●
Do not talk simultaneously with the other party.
●
Keep the volume of the receiving voice down. Otherwise, voice echo will
increase.
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or select "Dial" by using a voice command or
.
.