On its third quarter 2026 earnings call, held on Oct. 21, 2026, AT&T (T -6.34%) announced that it added more than 1 million subscribers across its high-speed fiber internet and mobile phone services. This milestone demonstrates that combining mobile and home broadband plans helps lower churn, which is the rate at which subscribers cancel service. Three things management said stand out.1. Network Efficiency Cuts Planned Infrastructure SpendingBuilding out fiber optic internet, which uses glass strands to tra ...