I have a 2011 Hyundai Sonata., and a Samsung Galaxy Nexus, My phone was at 4.2.2, could not get contacts or call history to sync not matter what. Read here and others that maybe go back to 4.1.2. I read others experience state that version worked well. Not for me, not my phone, not my car. So now, while I decide whether to let the phone revert back to current version, I'm getting incessant reminders to update. I've already had the car to the tech guru at Hyundai service, he can't help. The next trip there will require me to leave my car and my phone for the whole day, while he conferences with Hyundai Corporate rep. The swervice center is 3 counties away and in another state. Right now I can't afford to do all this, knowing I would have to strip my phone before I could let them have it.
Got an other ideas?