T-Mobile Data Breach Class Action Lawsuit Filed by Stueve Siegel Hanson


On August 19, 2021, Stueve Siegel Hanson and co-counsel filed the nation’s first class action lawsuit against T-Mobile relating to its massive data breach affecting at least 54 million people.

Earlier in the week, reports surfaced that hacking groups stole the data of up to 100 million people from T-Mobile’s servers and were selling a portion of it on an underground “dark web” internet forum for 6 bitcoin, or approximately $280,000.

T-Mobile later confirmed that at least 54 million people had their information compromised, including 40 million former or prospective customers who were not current customers but had previously applied for credit with the carrier. More than 13 million victims are current “postpaid” customers—or T-Mobile customers who get billed at the end of each month. The victims had their full names, dates of birth, social security numbers, and driver’s license information stolen. 850,000 prepaid customers—who fund their accounts in advance—had their names, phone numbers, and PINs exposed. It is very possible that additional victims will be identified as T-Mobile’s investigation into the breach is ongoing.

Stueve Siegel Hanson partnered with co-counsel from Tousley Brain Stephens, MoginRubin, and Hausfeld to file the lawsuit against T-Mobile in the U.S. District Court for the Western District of Washington. Among other claims, the lawsuit asserts claims for negligence, unjust enrichment, and violations of the California Consumer Privacy Act and seeks damages and injunctive relief resulting from the breach.

Stueve Siegel Hanson is a national leader in data breach and privacy litigation. Our attorneys have served as lead counsel in many of the nation's largest data breach cases and recovered billions of dollars for data breach victims. If you received a notification letter informing you that your personal information was compromised in the T-Mobile breach, please fill out a contact us form below.

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