I had a similar issue with a K700i...

To get it to stay paired (and stay connected)with the car, I had to copy all
the contacts to the SIM card from phone, then delete the contacts on the
phones memory. Delete all txt messages, in sent , inbox and drafts. set the
phone to use SIM card for address book... quirky little sucker, but it now
works and stays connected!... at least this will do untill i either upgrade
or swap the phone for a nokia or semans (both of which seam to work better
than sony)..

Hope this helps....

Russ

"Harry" > wrote in message
...
>
> Hi,
> I know hat this is a long shot as the phone is quite new, but I was
> wondering if anyone had experienced anything similar to the following
> problem:
>
> I tried to pair my new handset to the car Bluetooth system and it was
> immediately recognised. I went through the pairing sequence as I have done
> numerous times with my T610 and T630.
>
> It said on screen 'Bluetooth connected', and then immediately 'Bluetooth
> disconnected'
>
> This keeps happening.
>
> Can anyone help diagnose this and possibly offer a solution, please?
>
> TIA
>
> Harry
>
>
>