Toyota RAV4 2010 Quick Reference Manual page 305

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Call history
Up to 5 phone numbers can be stored in each of the outgoing and incoming
call history memories.
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When talking on the phone
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Do not talk simultaneously with the other party.
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Keep the volume of the received voice down. Otherwise, voice echo will
increase.
3-3. Using the hands-free phone system (for cellular phone)
I n f o r ma t i o n P r o v i d e d b y :
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