Ive been having this problem for a few months now. dunno why its just stopped working. after enabling it i can see the address and it now has a red underline under two of the letters/numbers in the address. so i assume the address is bad (the under line portion to be specific) but i have no ideas on how to reconfigure the phones master bluetooth address. ive tried changing to various android builds and changing to official and unofficial kernals. tried full wipes and catch wipes and nothing seems to reset the blootooth address or get it working again.