According to foreign media 9To5Mac reports, major mobile operators (T-Mobile, Metro, Verizon, AT&T, Sprint, etc.) all suffered large-scale DDos attacks.
The potential source of these attacks is still unknown. The popular "Anonymous" Twitter account @YourAnonCentral speculates that it "may be the source."
A large number of users went to the operator's official website and other social platforms to post maintenance, and a large number of American users complained that they could not communicate normally, such as making calls and receiving calls normally. The network connection is very unstable, and they delay a lot of work. The areas covered by the US carrier network paralysis are mainly Miami, Atlanta, Houston, Chicago, Brooklyn, New York City, and Los Angeles.
Neville Ray, President of T-Mobile Technology, explained yesterday’s sudden communication failure:
Although complaints about voice and SMS services are spread across the four major operators (including AT&T, Verizon, and even Sprint), it turns out that only T-Mobile has really encountered technical problems.
Customers of other operators found that they could not dial the number of T-Mobile users, and they mistakenly thought that the network line they were on was not available.
Although T-Mobile admitted to encountering a failure, it did not explain in depth how it affected its competitors' network customers. Strangely, T-Mobile’s data service is not affected, and people can still communicate through instant messaging (IM) or video chat. After tense repairs, at 10:03 PM PST, T-Mobile reported that all services have returned to normal.
Now, Neville Ray, President of T-Mobile Technology, is trying to explain the basic details behind the failure.
He said that although the company set up redundancy, a leased fiber supplier's line encountered problems, resulting in backup failure and system overload. During this period, the core network used for voice calls (especially VoLTE services) encountered capacity bottlenecks.
Neville Ray apologizes to customers who have suffered inconvenience because the actual business failed to achieve the expected level of excellence.
According to T-Mobile's explanation, it was the fiber overload that caused the system to be overloaded, affecting the voice services of the four major operators, which also happened to explain that the cause of the traffic burst was not a DDos attack.
