Google has notified customers of its Fi mobile virtual network operator (MVNO) service that hackers were able to access some of their information, according to TechCrunch. The tech giant said the bad actors infiltrated a third-party system used for customer support at Fi's primary network provider. While Google didn't name the provider outright, Fi relies on US Cellular and T-Mobile for connectivity. If you'll recall, the latter admitted in mid-January that hackers had been taking data from its systems since November last year.