How to turn off advertised SDP services?

When I do a 'sdptool browse local' I see a list of advertised services  
such as "Headset Audio Gateway", "AVRCP TG", "Audio Source" and etc.   
I remember there /used/ to be service conf files that I can control  
which services are on/off, but I can't find them any more.  It is  
possible to "sdptool remove" the services, but they come back after  
reboot...

I am wondering how to turn them off for good.

Thanks in advance.


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