https://www.fool.com/investing/2025/03/28/is-att-a-buy/
"Here is the problem: AT&T's core business doesn't grow very fast. Most U.S. adults have cellphones or smartphones, leaving the three companies that dominate the field (AT&T, Verizon Communications, and T-Mobile US) to fight over a relatively stagnant customer base. AT&T is guiding for low-single-digit revenue growth this year, and analysts estimate the company will grow earnings by just 4% annually over the next three to five years."