It doesn't happen all the time, but it happens may be like 30% of the time.
Disconnects exactly at 20 seconds.

(When I unpair the phone from the car, phone itself works perfectly.)

I went through the phone manual, but didn't find anything.
I googled, but no luck.

Seems like I'm the only one with this problem.

I'm using the T-Mobile with unlocked LG KE970 Shine phone.

Is anyone experiencing the similar problem(s)?

 

wow your problem sounds like nothing compared to mine.
my phone disconnects after every call so i cant make two calls after another.
it disconnect for about 30 secs and the connects again. and if i try to call in between the phone freezes. i am using a t-mobile k790. i think my problem is the phone though not the car. good luck with the problem

 

I had similar problems when using any Treo on even an iPhone, but my Nokia and Blackberrys worked great with no issues, so it is probably the phone and not the car. But the only way to know for sure is if you have another phone to pair and try.

 

I had the same problem with my LG phone, but it only disconnected incoming calls. When I made the call, it never disconnected me. The dealer was unable to recreate the problem, so I pretty much just gave up on the bluetooth.

 

FWIW, my iPhone works fine with the car. No disconnects on calls I receive or the ones I make.