The approved phone list is different for the ULF bluetooth systems which Red330 has vs the factory incorporated Bluetooth systems as of 3/05. The treo 650 is not on the list for the ULF system's approved phones. I have however paired my Sprint Treo 650 to a few ULF systems without any probs. Your best bet is to get a friend to let you try it before purchasing or go in to a Sprint store and see if they will try it for you. I think it will work but you may only have limited functions. Also to what Hootie said, he is right bluetooth is bluetooth however BMW's list is Carrier specific meaning only the phone by that specific carrier is guaranteed to work so keep in mind that only that specific phone with that specific carrier will BMW give you technical support on if you have any probs.
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