Complex sentence: In the United States between 2005 and 2010, the Federal Communications Commission (FCC) moved TV channels in the 2 GHz TV BAS band at the request of Sprint Nextel, so that it could use a portion which adjacent to PCS frequencies it already uses.
Split into simpler sentences: In the United States, the Federal Communications Commission (FCC) moved TV channels in the 2 GHz TV BAS band. This was done at the request of Sprint Nextel, so that it could use a portion of what was the prior BAS band, which is adjacent to PCS frequencies it already uses.