Once I download the phonebook from the Sony phone, I choose my Moto E815 phone as default phone in the setting page and now I use my Moto handsfree. Remember when I download the phonebook I use the Sony phone as the default phone but switch to the Moto E815 once the phonebook is loaded. Once the car is in motion on the "1 touch dial" is available and not the phonebook. When the phonebook is downloaded you can choose up to 16 numbers for the "1 touch dial" function. I only wish the Lexus has the voice recognition dialing in my Mercedes. I guess you can't have it all.
Regarding the sim-card. Without it the phone is inoperable. In fact it wouldn't
even allow the phone to boot up. My advice is to get a cheap Sony GSM phone from Ebay and use it for download purpose.
John
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Yes, you can only use the "1 touch dial" when the car is in motion. Also once the phonebook is downloaded into the NAV unit, you can use any phone to dial.
If Cingular or T-Mobile have good coverage then it is much easy to sign up with one of them and purchase their bluetooth phone. I don't have that choice and this is way I had to do it this way. Before you march into the store to purchase any phone, please go to www.lexus.com to find out which phone is 100% compatible. Good luck.
John