T-Mobile U.K. said Wednesday that an employee was to blame for stealing
possibly millions of customer records and selling the data to competitors.
T-Mobile informed Britain’s Information Commissioner’s Office (ICO) of the
data security breach. The data included customers’ contract renewal information,
including customers’ contract expiration dates. T-Mobile said the data was sold
to "third parties."
"The number of records involved runs into the millions, and it appears that
substantial amounts of money changed hands," the government body said in a
document submitted to the Ministry of Justice.