My mom has the family plan on sprint and doesnt want me getting a new service provider but my samsung sph-A620 (about a year old) isnt BT compatible.

 

sony ericsson t608...I have this one. Not a big fan of the phone itself, but the bluetooth seems to work pretty well.

the other is the lg-325. Havent tried the BT on this one, but I'm sure you can find some more info if you do a search.

 

Treo 650

 

LG-325 works great but battery life and signal strength do not display.