No Bluetooth on CM12.1
This seems to be a known problem when using
[ROM][5.1.1][SM-G360H/HU] CyanogenMod 12.1 for Samsung Galaxy Core Prime
The original developer &gt;&gt;doesntexits&lt;&lt; already knew this and provided a flashable zip file which seems to fix problems related to bluetooth.

This flashable zip file has to be downloaded and installed through the recovery.

all this information can be obtained from the original post on XDA-Forums