AT&T sues Comcast alleging false “Fiber-Powered” advertising claims

AT&T has filed a lawsuit against Comcast in the U.S. District Court for the Northern District of California, claiming the cable giant falsely advertises its Xfinity internet as “Fiber‑Powered” even though most homes receive service via copper coaxial cable.

The complaint, filed on Friday, says Comcast’s marketing creates the impression that customers get 100% fiber service, which AT&T argues is misleading and harms its own fiber business.

What AT&T alleges

According to the complaint, Comcast’s Xfinity service runs on a hybrid fiber‑coaxial network. While the backbone uses fiber, the final “last mile” connection to a home relies on copper coaxial cable. AT&T says the company’s ads label this service as “Fiber‑Powered internet” and “Fiber‑Powered Wi‑Fi” without clearly disclosing the copper portion.

AT&T cites examples of ads that include fine‑print such as “Xfinity Internet is powered by fiber and connected to premises by coaxial cable,” arguing the disclaimer is buried and does not prevent consumers from assuming a fully fiber connection.

Why the case matters to consumers

If the court grants AT&T’s request, Comcast could be forced to stop using the “Fiber‑Powered” label unless it clearly explains the role of copper wiring. For current and prospective Xfinity customers, this could mean more transparent advertising about the speed and reliability they can expect.

Consumers who feel misled should review their service agreements and any promotional materials. While the complaint does not specify a deadline for taking action, keeping copies of ads and bills can be useful if a class‑action or individual claim later emerges.

Legal claims and relief sought

AT&T, represented by the Dallas firm Reese Marketos, alleges false advertising and unfair business practices. The company is seeking monetary damages and an injunction that would require Comcast to stop describing its hybrid service as “Fiber‑Powered”.

Comcast has not responded to requests for comment at the time of publication.

When to consider legal help

Anyone who believes they were misled by the “Fiber‑Powered” branding and wants to explore potential claims should consult an attorney experienced in consumer protection and advertising law.

This article is general information based on Courthouse News Service and court or agency records available at publication time. It is not legal advice; laws and deadlines differ by state and by case. Published November 14, 2026.