Researchers from French government agency ANSSI have discovered a new hack that could allow hackers to make calls, send texts, browser a malware site, and do many more activities using your iOS or Android devices’ personal assistant Siri or Google Now. Hack could leverage a hacker to do whole lots of things on victim’s mobile phone without even speaking a word. Hack only requires: A headphone-connected iPhone or Android phone with headphones plugged in. A radio transmitter sends radio waves to silently trigger voice commands on any phone with a pair of microphone-enabled headphones.
Source: https://thehackernews.com/2015/10/radio-wave-phone-hack.html