Lexus OM48A84U Owner's Manual page 378

SETUP
6. Select the data you want to register.
7. Select the desired phone number.
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From "Contact Data" screen
1. Push the "MENU" button and select
"Info./Phone".
2. Select "Phone".
3. Select "Contacts".
4. Select the desired data from the list.
5. Select "Options".
6. Select "Set Speed Dial".