We have a Xperia U in the UK on Vodafone but just cannot make a blue tooth connection. The car is a Nissan Note which will successfully connect to a Nokia C3-00. Sony keep giving the same reply and so far have been no help at all but advise checking the software. When connected to PC Companion it comes up with the message Software up to date , although the Sony site is showing a later version. I have backed up the phone but when i check the messge is the .dbk file is corrupt, this is the same on all the back ups made to date. Any help would be welcome.