The article cited requires further inquiry, because it doesn't support itself.

What it refers to is the fact that they took a spectrum analyzer onboard and learned that people use their cellphones even when they are not supposed to do so. (I could have told them that without doing a study). One thing I can't tell from the "study" is whether it included use of email (i.e. - Blackberries, which I see even more than cellphone) or only voice devices.

But the article does not include *any* information to lead me to believe that they established an actual effect on flight instruments. That is, the only equipment it refers to is the spectrum analyzer. I am not a EE, so I would request that one of you speaks up. Just because they proved that people do sometimes use cellphones, do you see anything in the article which makes it seem like they correlated such usage to interference?