Originally Posted by
NSEU
The wifi system trialled on one of 767s comes with strict guidelines. Only specific avionic component part numbers can be fitted to the aircraft (those that have been tested with this particular wifi system).
As I recall, deviating from this necessitates the deactivation of the wifi system.
Rgds
NSEU
That's probably more to do with the US military owning that part of the spectrum than anything else. There are different channels used in different parts of the globe for 802.11:
List of WLAN channels - Wikipedia, the free encyclopedia