This week Haider al-Ameri, a senior figure in the Islamic Supreme Council of Iraq, a key party in the ruling Shia-led alliance, annoyed Mr Maliki by saying there was little evidence of direct Iranian interference.

ECONOMIST: Iraq, Iran and the United States

So I tracked down an engineer with direct knowledge both of the government interference testing and the design of cellphone GPS chips to find out more.

FORBES: Cellphone Manufacturers Solved GPS Interference Problem

Direct-shipping advocates claim that runs contrary to the U.S. Constitution's ban on interference with interstate commerce.

FORBES: Bottled up

Although data are still lacking on the direct impact of mobile technology on cognition, there is extensive evidence showing that our brains are exquisitely sensitive to external interference by both irrelevant distractions and multitasking.

CNN: How mobile tech can influence our brain