Besides that Treo brick, what bluetooth phone works with Sprint???

P900 P910 will not work with x5

treo will work send and recieve calls but the address book will not transfer like SE T68I moto v551 etc.. , unless u transfer the contacts in favorties pages.

i returned mine , you will have some problem pairing it, so be patient and keep trying but some times paired in one attempt. :mad: .

Tried moto razr on Cingular, very poor reception in my area just north of Boston, lots of crackling and static. Paired fine, worked fine, just lousy reception. Returned it.

Tried friends Verizon phone, not sure which model. Worked, paired first time, but sound quality not that great. People on other end of the call said it sounded like a poor speakerphone, we had strong signal at the time.

Tried Treo 650 on Sprint, has worked the best for me. Paired fine, only the favorites (up to 70) transfer to the vehicle's address book as mentioned but that's acceptable for me. Call quality can vary, from very good to sounding like I'm under water (according to my wife). Mostly it's very good. I've had it for 3 weeks, keeping it. Would prefer a clamshell design, but when you never take it out from your briefcase or coat pocket it's less of an issue.

I use the Motorola V600 in my Convertible and it works great. Last week I bought the new V3 and I hope this will work well too.

Use SE V600i and Nokia 3230 and had no problems pairing them up and they both work fine in my X5 but obviously no Sms and no contacts exchange!My wife has the SE K750i which I have also paired with th BT in my car.Comments on the 750i are that the loudspeaker is not loud enough and poor video quality compared to Nokia but probably has the best camera quality at the moment and like mine V600i it has a amazing screen resolution.