My phone has no sound, and it now says "-Car Kit-" WHY?
Firstly i come to your 2nd question where you asked what the meaning of Car Kit. Bro Car Kit means a sound system which contain also blue tooth, DVD, FM etc. So in Car Kit any one can pair their blue tooth devices i mean your cell phone where blue tooth are available. So when you pair your device at the define range then Car Kit will be connected with your phone so when your receive or dial a call then the Car kit speaker will be active automatically. You can hear voice from there.
Now come to your next question,
If your Car is off or you are so far from car then your speaker will be enable normally but if it don't work then means your speaker disable or inactive. As a result, you have to change your speaker by a expert technician then you will release from this problem. Thanks a lot