[Motorola Droid RAZR] Ohmster:
Man is a tough one. I generally stick to subjects I know and can answer directly. This is over my head a bit, I may not help you directly, but can help steer you in the right direction.

We need information about your phone:

Model #: XT910 or other?

Country/City where you are using it.

Language, Traditional Chinese I believe you said. Was this language set in Phone/Setting/Language and input or are you using a third party app to get this language?

In the same settings as above, what are you using for Text to speak output? Google, Svox, or something else?

Are you getting headset distortion in everything such as music, video, or radio broadcasts?

Audio distortion can be caused by volume settings too high. I spent my life on electronic and audio repair. You need a better volume control for the phone.

Does it ever work good at all? What about plugging in your friend's cheap Walkman headphones or ear buds?

What carrier do you use for phone service and do you know the Preferred Network type such as : CMDA, LTE, GSM, found in Settings/...more/Preferred Network type.

List ANY audio, language, or other apps, modules, or anything that would affect the audio and language.

I would suggest you try and use a good, multi volume control. I use Volume Control but you can use anything that allows you to set different volumes separately. This has presets. I make preset one with everything on "Full Blast". There may be a separate volume slider for the Bluetooth headset. When set too high, audio signal clipping occurs and it make the sound horrible! Like when a drunk friend comes over and likes a song so he turns the stereo up as far as it will go, it will sound HORRIBLE because the signal is over driven and too loud for the amplifier circuits that follow it, causing severe distortion.

My very first Bluetooth headset I bought at the Auto Parts store, it was $20 or less, very cheap, worked alright and broke in two weeks. I then bought one at the Verizon store, had some store credit and got a good one for a little more money. I have this one for years, never gives me a problem, EVER. Battery charge is good for 5 hours. A good headset makes a BIG difference. You can test with anything else you can plug in. Earbuds, headphones, small speaker with HP jack on it, plug into a stereo or something else. Try anything to see if you EVER get clear audio out of the headphone jack before moving on to the Bluetooth device.

I know I am not helping as much as you want, but the audio volume too high for the headset is real. The additional information will allow those that know more than me about Bluetooth and foreign carriers and signals help you more. Take screenshots to show important information and attach them if you have to. I will give a screenshot of Volume Control in action with Bluetooth headset connected. In-call volume is what I would try if I were you, and if the headset has it's own volume control, use that one too. Give more info on the phone so someone can help you more, if you can, please.

This is an issue that is more than I can help with, but with the right information given, someone more experienced in this area might jump in to help. Good luck my friend. :good: