T-Mobile this week offered further evidence the company is preparing its network for the launch of 5G network services. Specifically, the nation’s third-largest wireless network operator announced the expansion of a deal with Crown Castle to add more small cells to its network, and it also said it now has fiber backhaul nationwide to support 5G.

The moves are important for T-Mobile as the operator works to install new equipment on its towers to support the launch of 5G New Radio network technology in its 600 MHz spectrum and millimeter wave spectrum later this year. T-Mobile earlier this year said its network vendors Ericsson and Nokia will build a 5G network across the carrier’s 600 MHz, 28 GHz and 39 GHz spectrum in 30 cities—including New York, Los Angeles, Dallas and Las Vegas—during 2018. In recent weeks, T-Mobile has added a price tag to those efforts: It announced $7 billion worth of 5G equipment purchases split evenly between Nokia and Ericsson.

But those equipment purchases are just part of T-Mobile’s work to upgrade to 5G services. The company also said it will expand its existing agreement with tower company Crown Castle to deploy additional small cells within its existing footprint and light up small cells in new markets.