AT&T has taken Charter Communications to federal court over a single word in Spectrum’s advertising: “fiber”. AT&T, which has spent years replacing its old copper lines with fibre, argues that the “Fiber-Powered” branding leaves customers believing that fibre reaches the home, when coaxial copper usually covers the final stretch to the router serving devices such as the Galaxy S26 Ultra or iPhone.
The federal complaint against Spectrum
AT&T Teleholdings and AT&T Wireline Holdings filed the complaint on Friday in the Northern District of Texas, case number 3:26-cv-02919, naming Charter Communications and Spectrum Management Holding Company as defendants. The claims are false advertising under the Lanham Act plus unfair competition under Texas law, and AT&T has asked for a jury trial.
The argument is that “Fiber-Powered Internet” and the “Spectrum Fiber Broadband Network” umbrella both suggest a fibre-to-the-home service, while most Spectrum internet runs on a hybrid network where coaxial cable makes the final connection. AT&T also highlights the timing, since Charter closed its Cox Communications acquisition on 20 August, and Cox has used the same phrasing for years.
Charter has not yet answered the allegations in court. The dispute follows an earlier review in March, when the National Advertising Division examined the same wording and Charter agreed to adjust its disclosures. AT&T evidently does not consider the added fine print sufficient, which is how a self-regulatory complaint became a federal lawsuit five months later.
What fibre-powered means at your wall
The plain version is this: fibre runs from the network hub out to a box in your neighbourhood, then coaxial copper cable carries the signal the rest of the way into your building. Charter’s own FAQ describes it in almost those terms, and its true 100% fibre product is offered only to select residential customers.
Ookla’s first-half 2026 figures complicate both sides. On its Speedtest Connectivity Score, AT&T Fiber scored 82.90, with a median download of 374.75 Mbps. Verizon Fios followed at 80.82, Cox at 78.53, Xfinity at 78.24 and Spectrum at 76.92. The distance between the best fibre network and the hybrid network AT&T is suing over comes to roughly six points.
For customers on Spectrum or Cox today, nothing about the service changes because of this filing, and the wiring in the street remains the same as it was last week. What would change, should AT&T win, is the label on the box.
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Image: phonearena.com
