T-Mobile has finally shifted its 800MHz spectrum, as part of a spectrum swap deal with Grain Management that sees the telco pick up Grain's 600MHz assets.

As part of the planned swap, first announced last year, T-Mobile will offload its 800MHz spectrum to Grain for $2.9 billion, while scooping up 600MHz frequencies from the company as part of the exchange.

The deal has now been finalized and confirmed by T-Mobile today (August 11) around a month after the Federal Communications Commission (FCC) approved the spectrum swap.

Grain has now acquired 4.85MHz to 14MHz of 800 MHz spectrum from T-Mobile in 3,224 counties, with T-Mobile snapping up 10 megahertz of 600 MHz spectrum from Grain in 212 counties.

T-Mobile has been trying to shift the 800MHz spectrum following its agreement to acquire Sprint in 2020 for $26bn.

The carrier had agreed to sell the spectrum to EchoStar-owned Dish Network for $3.59bn, which was set to operate as the country's fourth mobile carrier. However, that deal fell through when Dish said it was unable to afford the spectrum.

T-Mobile will use the 600MHz spectrum by bolstering its 5G mobile network.