I was unable to make chan_cellphone work with the below versions of bluez which I installed via yum with updates on FC6. It appears that once you have bluez-utils-3.7-2.i386 it willn't let you install bluez-pin but rather bluez-gnome which doesn't work.
to correct I
rpm -e bluez-utils-3.7-2.i386
rpm -e bluez-gnome-0.6-1.fc6
then download and installed bluez-utils-2.25-12 & bluez-pin-0.30-5 from core