Cell phones: Bluetooth Phone that will work with mac

Bluetooth Phone that will work with mac

Hey all, I am looking at getting a blootooth seni-smart phone, but i am trying to not get a data plan. The main things i need are the ability to transfer my contacts and calander back and forth to my macbook pro. As far as a provider I am looking at either sprint or verison, though sprint has a less expencive plan that works for me.
Thanks for any advice.