The American subsidiary of Deutsche Telekom has apparently been the target of a major attack by hackers.
The technology portal Motherboard reported that the hackers claimed to have stolen data from more than 100 million customers of the mobile communications company T-Mobile.
Roland Lindner
Business correspondent in New York.
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Motherboard said it had spoken to the hackers in an online chat.
The attackers said they had "complete customer information," including names, addresses, phone numbers, social security numbers, driver's license details and cell phone identification numbers.
The publication has seen a sample of this data according to its own presentation and verified it as authentic.
Six bitcoins required
The hackers had previously offered personal data for sale on an online forum, but initially did not say that it was information from T-Mobile.
For a data set with 30 million social security numbers and driver's license data, six Bitcoin or currently around 285,000 dollars have been requested.
The hackers told the publication that T-Mobile had apparently discovered the attack and blocked access to its computer systems. The attackers would have downloaded the captured data beforehand and saved it several times. T-Mobile initially only announced that it was aware of the allegations of data theft in the online forum and was investigating them.