I found this study and at the end is an interesting summary from the RTCA: "Those findings indicated that the probability of interference to installed aircraft

I found this study and at the end is an interesting summary from the RTCA: "Those findings indicated that the probability of interference to installed aircraft systems from PED, singly or in multiples, is extremely slight. However, the slight possibility of interference to aircraft navigation and information systems during critical phases of flight, e.g., takeoff and landing, should be viewed as potentially hazardous and an unacceptable risk for aircraft involved in passenger carrying operations. Therefore, the committee recommends that the use of PEDs be restricted during certain critical phases of flight." http://www.rvs.uni-bielefeld.de/publications/Incidents/DOCS/Research/Rvs/Article/EMI.html#Ber97.3 http://www.rvs.uni-bielefeld.de/publications/Incidents/DOCS/...