I'm searching a ROM with working bluetooth HFP (hands free protocol) and HSP (headset protocol). All ROM's I tried so far (RR, Lineage 14.1 official and inofficial, AICP, FlyMe 5.1.1) are only able to stream sound via A2DP to a bluetooth sink = headset or speaker. What I need is the HFP protocol as this is used by some applications (POI warners in detail) and hardware as motorbike headsets / car audio systems . Can anybody give me an advise what ROM will provide this and is NOT based on the stock 4.x ROMs ? Or is bluetooth HFP generally limited to stock ROM only ?