Sharing spectrum could be a game changer for wireless operators in the U.S.

Mid-band spectrum is at a premium in the U.S., and purchasing low-band airwaves is rather expensive. You might recall that two years ago, T-Mobile spent nearly $8 billion . That turned out to be a very wise move for the carrier since earlier this month it flipped the switch on the first nationwide 5G network in the states using this spectrum. Dish Network was next, spending $6.2 billion for a chunk of 600MHz airwaves.

Now, , the government is looking to reduce the costs of purchasing spectrum by offering a plan that allows some carriers to share these airwaves ...