From the WSJ Evening Wrap:

FCC Rules Out Cellphones on Planes

The Federal Communications Commission won’t allow passengers to use cellphones while in flight, saying in an order that was released today that there was “insufficient technical information” available on whether airborne cellphone calls would jam networks on the ground.

Existing rules require cellular phones to be turned off once an aircraft leaves the ground in order to avoid interfering with cellular network systems on the ground. The FCC began examining the issue in December 2004.