https://techmonitor.ai/technology/cybersecurity/t-mobile-data-breach > Up to 100 million customer records have been stolen from T-Mobile US, the company confirmed this week. The data breach could turn out to be a costly one for the mobile operator, as new research shows the cost of so-called “mega breaches” has risen to more than $400m in 2021. > Details of the breach emerged on Sunday, when 30 million social security numbers and driving licence details appeared for sale on an online forum. The seller said the data came from a cache of over 100 million records stolen from T-Mobile. Yesterday the company admitted it had been subject to a breach, stating “unauthorised access to some T-Mobile data occurred” but added that it was still investigating precisely what sort of data had been taken.