When customers of the U.K. cellphone company Three logged on to view their bills, some were greeted with someone else’s account information.
The company confirmed a technical issue it was still investigating, according to a Guardian report. Affected customers who logged in over the weekend saw someone else’s name, address and call history, though the company said no financial details were disclosed.
Three has about 9 million customers in Britain.
In November, the company dealt with a data breach of almost 134,000 customers’ information in a scheme to steal high-end phones. The National Crime Agency arrested three men as part of the investigation.