Toyota Sienna 2010 Owner's Manual page 326

3-4. Using the hands-free phone system (for cellular phone)
CAUTION
Caution while driving
■
Do not use a cellular phone, or connect the Bluetooth
NOTICE
To prevent damage to a cellular phone
■
Do not leave a cellular phone in the vehicle. The temperature inside may
become high resulting in damage to the phone.
330
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phone.