Why This Fuss?
Dear PPruners,
It is a surprise that so much doubt exists regarding usage of cellphone onboard aircraft. As a layperson one can have these doubts but "Moo" as an engineer on latest generation aircraft should have researched little before making a comment like that, no wonder he doesn't fly those he services!! I agree with "Few Cloudy" remark that it is not for the cellphone user to determine whether or not the flight was safe. If any one has any doubt please take a cellphone close to an aircraft compass and see for yourself. I personally had an occasion when an ATC's instruction could not be heard before take off from one airport and after landing in another, on a 737-800. On both occasion same person was using his cellphone.
If there as any further doubt, it can be clarified by going through a report on cellphone by CAA (Effects of Interference from Cellular Telephones on Aircraft Avionic Equipment) under the "Reports Forum" of PPrune.
A few watts of transmission or not, whether it interferes with aircraft system or not, it does seem to be causing lot of brain tumors around the world! (one died recently in London). So why add to that list when you can save your brain a few hours of cell storming!!!