T-Mobile is starting off 2019 with another 5G milestone.

T-Mobile today announced that it’s completed the world’s first 5G data call and video call on 600MHz spectrum. T-Mo teamed up with Intel and Ericsson to conduct the call, which was completed on a live commercial network. Using 600MHz, the three teams generated a 5G signal that can cover more than a thousand square miles from a single tower.

T-Mo also completed a tri-band 5G video call with three users on 600MHz, 28GHz, and 39GHz spectrum bands.

As it’s been rolling out 600MHz LTE coverage, T-Mobile has been deploying 5G-ready equipment to prepare for its eventual 5G rollout. The carrier has said that it will begin lighting up its 5G coverage in 2019 and will have nationwide 5G coverage in 2020 using a combination of spectrum bands. The first 5G smartphones are expected to launch this year, including a model from Samsung.

Source: T-Mobile