T-Mobile has said the company's planned $4.4 billion acquisition for most of UScellular's business is progressing well, and on course to complete next year.

The carrier also acknowledged that other acquisitions of Metronet and Lumos are on track to be completed next year as well.

In an earnings call this week, T-Mobile confirmed that its acquisition of UScellular's operations, including its customer base and around 30 percent of the company's wireless spectrum, could be completed by mid-next year.

T-Mobile CEO Mike Sievert noted that the company is in the planning process post-acquisition.

"We have begun some planning with the counterparties, particularly UScellular, and because that's a more complicated set of planning that we have to do. And we've met the teams, they're fired up," said Sievert.

"This is a transaction that very clearly will result in both lower prices and better network. Both T-Mobile and UScellular customers will have a better network experience. There's no question about that. And UScellular customers will be offered lower prices as they migrate to the T-Mobile plans."

UScellular is one of the biggest regional providers in the US outside of the traditional big three carriers (T-Mobile, Verizon, and AT&T).

The company, which has around 4.5 million customers and operates in 21 US states, agreed last week to sell a portion of its spectrum to Verizon for $1 billion.

T-Mobile also provided an update on its fiber acquisitions.

The carrier noted that its proposed joint venture (JV) with investment firm KKR to acquire fiber Internet service provider Metronet is also on course for completion next year, along with its JV with EQT Infrastructure to acquire fiber-to-the-home platform Lumos from EQT’s predecessor fund, EQT Infrastructure III.

It expects the Lumos deal to complete early in 2025, while Metronet is on track for later in the year. The deals are part of T-Mobile's plans to ramp up its fiber offering, in order to compete with AT&T and Verizon.

T-Mobile posted revenue of $20.1bn for Q3, up from $19.7bn year on year, while its net income increased 42.8 percent during the quarter.

The carrier added 865,000 post-paid phone customers during the quarter, which was its highest in a third quarter for a decade.

T-Mobile also revealed that it added a further 415,000 fixed wireless customers, taking it to six million three years after it launched, halfway to its long-term target of 12 million by 2028.