I was driving then first noticed I couldn't connect my iPhone to make a call. Then when I stopped I noticed that the touch screen did not make a noise when I touched the buttons. Then there was no sound for radio and I only had HVAC and GPS functions only. Certain buttons would not respond on the touch screen. I did a Master Reset twice and problem still persisted. I was going to take it to dealer then decided to disconnect the battery for a few hours and when I reconnected and turned on the screen said updating and gave a slide timer then when it went to finished everything worked fine. I just wanted to post this just in case someone else is having same problem.