Since this a one of those things that people wanted , I am going to make a new topic to give full details...
You have to be rooted first..then go to the root directory, them oem folder, them in the config.txt you will see a line (i forgot exactly ) but something like..com.fyt.bt = "1"
set it to "0"
and then save and reboot.
if you have the new latest updates, the bluetooth setting in the android menu will disappear (at least on mine it did).. you can use a third party tool to show the bluetooth setting if you want to see and pair devices from there.
Or you can just use the conventional way .. (the default bluetooth app )
on the 4pa forum, I read if setting it to 0 doesn't work you can try different numbers up until 5.
Please give it a show and let me see if it works for ya.
#语音应用，语音应用在录音时需要机器临时静音，以免干扰录音，影响识别效果
#通常语音应用录音开始时会请求Audio Focus,该文件中适配的应用，在申请Audio Focus时
#服务会做相应的音频处理，释放Audio Focus时恢复到当前状态声音输出
com.google.android.googlequicksearchbox #Google语音
com.txznet.txz
