California regulators have formally accused AT&T of providing false information to the Federal Communications Commission in an effort to discontinue service on its aging copper-based wireline telephone network, according to Arstechnica. The filing, submitted by the California Public Utilities Commission on June 15, 2026, challenges AT&T’s petitions to preempt state rules and end landline obligations affecting roughly 199,000 customers. This comes as AT&T and others have been shutting down DSL and traditional phone lines that run on copper in many states.
The dispute centers on AT&T’s representations about California regulations. The company has claimed that state policies block carriers from retiring outdated copper facilities or shifting investment toward fiber networks. Regulators counter that the CPUC deliberately chose in 2008 not to create such barriers, with the explicit goal of supporting the rollout of modern, high-quality, and affordable communications infrastructure.
AT&T filed its FCC applications in May 2026 seeking approval to discontinue legacy voice service over copper lines in portions of its California territory. The company also proposed replacing the service with its LTE-based Advanced Phone offering, a voice-over-internet protocol solution that relies on mobile wireless networks. In parallel, AT&T sued California in federal court last month, arguing that Carrier of Last Resort obligations force the company to spend approximately one billion dollars annually maintaining an obsolete network used by a shrinking customer base. AT&T noted it has already obtained relief from similar requirements in 20 of the 21 states where it operates wireline service.
The FCC has moved to ease the retirement of copper networks through a 2026 order that streamlines discontinuance processes and contemplates preemption of conflicting state rules. This policy direction reflects broader industry trends as carriers phase out legacy copper infrastructure in favor of fiber and wireless alternatives. Copper networks, once the foundation of traditional telephone service, have become increasingly expensive to maintain due to age, declining usage, and the high cost of repairs. Many providers view the transition as necessary to reduce operational expenses and align with customer migration to mobile and broadband-based services.
The CPUC rejected AT&T’s earlier request in 2024 to be released from its landline obligations in California. Instead, the commission encouraged upgrades to fiber rather than outright network shutdowns. California’s latest filing argues that AT&T’s proposed wireless replacement fails to satisfy the FCC’s Adequate Replacement Test. The company’s applications rely on coverage maps that primarily show outdoor conditions and include disclaimers about limitations for indoor use or stationary scenarios. Regulators contend that buildings, terrain, and other obstructions can significantly impair signal reliability inside homes and businesses, leaving customers without consistent service.
Potential impacts on consumers extend beyond basic connectivity. The Advanced Phone service may require users to maintain a separate broadband internet subscription in areas with weaker cellular signals, particularly in rural regions or certain urban neighborhoods. This arrangement could raise total costs compared with traditional landline service, especially for low-income households. Additional concerns include reduced reliability for 911 emergency calls, lack of compatibility with certain assistive technologies used by people with disabilities, and dependence on customer-provided power and internet connections during outages. Questions have also arisen about continued support for programs such as Lifeline for low-income subscribers and relay services for the deaf and hard of hearing.
Under the FCC’s streamlined procedures, approvals for network discontinuances could advance more quickly. California is asking the commission to reject AT&T’s applications or, at a minimum, remove them from the expedited track. The state insists that AT&T must demonstrate reliable indoor coverage and full service equivalency before any approval proceeds.
The conflict illustrates ongoing tensions between federal efforts to accelerate modernization and state-level protections for universal service and consumer safeguards. While copper retirement promises long-term efficiency gains and supports investment in faster technologies, critics emphasize the risks of leaving vulnerable populations without equivalent access during the transition. The FCC continues to review the petitions, with comments having closed on June 15. The outcome could influence similar proceedings nationwide and shape how legacy networks are phased out in the coming years.
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