How important is spectrum to the wireless industry? So important that normally fierce competitors are working together. As Phil Godstein of Fierce Wireless reports:

AT&T Mobility, Verizon Wireless and T-Mobile USA inked an agreement with the Department of Defense to explore the possibility of sharing 95 MHz of spectrum that is currently used by the Pentagon and other federal agencies located in the 1755 – 1850 MHz band.

The announcement comes as the FCC and National Telecommunications and Information Administration encourage spectrum sharing between commercial and government users as one way to meet Americans’ seeming insatiable demand for mobile broadband.

So far, Sprint is sitting out the agreement, though Goldstein notes they will “follow the group’s work.”