I'd recommend you check to see if you have the most current firmware update. Also you may need to change your format. The phone number listings should only be digits, no special characters such as "-", "(", or ")". If you still can't transfer the contacts, see if you can put your phone numbers into a quicklist category in your phone and try to transfer the quick list. Also I would check with the Treo forums such as Treocentral for more help.
I think this may have to do with your phone's service provider as well. I have a 700p w/ sprint and it works. But I'm pretty sure verizon cripples certain bluetooth functionality so you may not be able to transfer the phonebook if you have service with them.
Bluetooth Phonebook Transfer - *success*
in 07 - 13 Lexus IS250 / IS350 / IS-F
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I think this may have to do with your phone's service provider as well. I have a 700p w/ sprint and it works. But I'm pretty sure verizon cripples certain bluetooth functionality so you may not be able to transfer the phonebook if you have service with them.