Play all audios:
Three originally confirmed that 133,827 customers had been hit by the attack last November. However following an internal investigation, the company says that an additional 76,373 more
accounts may have been affected, increasing the number of compromised account by 57 per cent. Personal data such as names, addresses, dates of birth and method of payment had been accessed
and could be used elsewhere, Three said. However no bank details or passwords had been compromised. In a statement, Three emphasised that no fraudulent activity had taken place specifically
on customer accounts, and that all affected users had been contacted. "We have continued to work closely with law enforcement to support the ongoing investigation. During the course of
the investigation, additional files were recovered as part of the same activity which we have analysed," the company added. "We ask customers to be cautious about anyone
contacting them... We advise caution when dealing with other service providers you may use.” "As always, customers should never give out any banking information.” The attack last
November was blamed on hackers using an employee login to access its customer upgrade database, potentially putting its nine million-strong UK customer base at risk. The hackers accessed
customer accounts and upgraded them in order to intercept the new phones and sell them on. Three only discovered the breach after customers filed complaints claiming that scam callers were
attempting to gain access to their bank accounts. If you think you've been the victim of a cyber-attack, you can check out _Express.co.uk's_ guide to the next steps to take here.