Researchers at the University of Luxembourg may have discovered a new way to look at a Cell phone to hack it.

With various hacks and information available on various phones, most of these look at the Operating System.

This research focuses on the underlying Radio Chip with possible flaws in it to overcome a cell phone.

Take a look at the article.  If this proves out to be true, then this could pose a serious problem to existing technologies.

http://www.pcworld.com/article/216842/coming_soon_a_new_way_to_hack_into_your_smartphone.html