"Starting in January, AT&T customers with digital landlines won’t be able to dial 411 or 0 to reach an operator or get directory assistance. AT&T in 2021 ended operator services for wireless callers, although customers with home phone landlines can still access operators and directory help. Verizon, T-Mobile and other major carriers still offer these services for a fee."
https://www.cnn.com/2023/01/07/business/telephone-operators-411-att-ctpr/index.html
https://www.cnn.com/2023/01/07/business/telephone-operators-411-att-ctpr/index.html