Устранение неполадок LG Tone Pro HBS750

my headset keep saying vibrate off

You can't splice enameled wire.

The stock ear-pieces have thinly-braided, enameled leads, given color at one end of a single wire to denoted (+). I don't know whether that polarity-color-label extends into the covered length, that might be frayed. But if it does, then your greatest challenge might be, in de-insulating that kind of wire. Its insulation consists of a thin but tough, transparent coating. I found in my youth, that the easiest way to do that, was actually to hold a cigarette-lighter-flame to it for a few seconds. After that, you might be able to "splice" it, if you apply very good dexterity.

My HBS-750 is not connecting with Bluetooth or sometimes disconnecting after being connected. At the same time it started altering its voice. When the device say "Power On.... Trying to connect" it has now started to say it in a very high pitch or a very low pitch. When it says that in an abnormal pitch it will not connect via Bluetooth.

Headset was working great until a phone call. It is charged and connected but will not play