Bluetooth module for Arduino uno

Can someone suggest cheap bluetooth modules for arduino uno?

I just need to connect my phone and arduino uno via blueooth and send phone's accelerometer over it.

Thanks.

HC 05 and HC 06

MOSHAYEDI:
HC 05 and HC 06

That is assuming the phone is an Android. If it is, it's pretty painless..

You might find the following background notes useful

http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino

This probably applies to a windows phone too, but nobody talks about that.

If it is an iPhone, you will need something else, like a BLE module.