Here's a link to the SoCal folks regarding a backdoor into iOS (iPhone). It seems the backdoor into an iOS phone is not too dissimilar from the backdoor into a Google (Android) or Windows phone. I'm not quite sure why the SoCal folks only seem interested in sharing this info with each other...
http://www.worldwidedx.com/scrap-radio-so-cal-radio-amateur-project-club/171571-ios-looks-like-has-undocumented-backdoor.html
http://www.worldwidedx.com/scrap-radio-so-cal-radio-amateur-project-club/171571-ios-looks-like-has-undocumented-backdoor.html