T-Mobile added 2.9 million phone subscribers in 2021, the carrier said during its fourth-quarter earnings call Wednesday and forecast its midband 5G network would reach 300 million people by 2023.
In three months ending Dec. 31, T-Mobile added 844,000 postpaid customers, a subscriber category prized by carriers for long-term revenue and overall success. It also added 224,000 net customers of its high-speed internet service.