Filed under: CellphonesIt looks like the FCC's investigation into Comcast's questionable traffic management is turning up a number of interesting details, the latest of which comes from AT&T's Robert Quinn, who told FCC Commissioner Robert McDowell that, "use of a P2P file sharing application would constitute a material breach of contract for which the user's service could be terminated." Quinn was apparently quick to add, however, that AT&T hasn't yet kicked anyone off the ne