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JAKARTA - Google's mobile network provider, Google Fi has just become a victim of a data breach. Where phone numbers, SIM card series and others belonging to customers have been stolen by hackers.

This incident, most likely related to that of T-Mobile, allowed hackers to steal millions of customer information.

The breach, disclosed on January 19, allowed intruders access to personal data belonging to 37 million customers, including billing addresses, dates of birth, and T-Mobile account details. The incident marked the eighth time T-Mobile has been hacked since 2018.

In Google's case, he's been pretty open about sending data breach notifications to Google Fi customers this week, telling them the incident revealed phone numbers, SIM card serial numbers, account status (active or inactive), account activation dates, and service plan details. cellular.

Fortunately, according to Google, the breached system did not store sensitive details such as full names, email addresses, payment card information, SSN, TIN, KTP, account passwords, or the content of SMS and phone calls.

"Our incident response team conducted an investigation and determined that unauthorized access had occurred and have worked with our primary network provider to identify and implement measures to secure the data on such third-party systems and notified anyone potentially impacted." Google notifications to customers.

"There is no access to Google systems or any systems monitored by Google."

While Google hasn't specified who the primary network provider was, it's believed they were referring to T-Mobile. Google Fi is a special telecommunication and mobile internet service in the United States (US).

Launching BleepingComputer, Thursday, January 2, a Google Fi customer who was also a victim of a SIM swap attack shared his experience on Reddit, saying he witnessed a real-time takeover of Authy's email, financial and authenticator app accounts.

"Hackers used this to take over my three online accounts, my primary email, financial accounts, and authenticator app Authy, all because they were able to receive my SMS and therefore defeat SMS-based 2-fac," said the Google Fi customer.

Once a two-factor authenticator app is compromised, it's easier for hackers to compromise other accounts, especially if they're registered using a phone number. Despite his attempts to stop it by notifying Google Fi, he was ignored by customer support.


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