Interesting article. Makes you wonder if running the 3g hotspot is worth the risk...

http://www.wired.com/2015/07/hackers...-jeep-highway/

Would be nice to have a network "kill switch", to disconnect from all external networks as desired.

When I was shopping for the S4 I also looked at the Lexus IS350. They go even further, allowing you to track your car's movements with a mobile app, which also reported other telemetry data. Not sure I like this level of data collection.