We published a story yesterday telling you about T-Mobile’s sudden outage which affected a lot of people. Although T-Mo restored all the services, that wasn’t done almost immediately despite the company’s quick response. And today we found out what caused the issue. It looks like a software error was to blame. That’s why thousands of T-Mobile customers saw dropped calls and busy tones despite having very good signal from the towers. Here’s what T-Mobile had to say about the outage:

On Tuesday, some T-Mobile customers may have experienced service disruptions impacting voice and messaging services. We restored full service to all affected customers later in the day. After investigating the cause, we have determined that a backend system software error had generated abnormal congestion on the network. T-Mobile has since implemented additional measures to help prevent this from happening in the future. We again apologize to those customers who were affected and may have been inconvenienced.

This certainly doesn’t look good on T-Mobile especially considering the recent Sidekick troubles. What about you? Is you T-Mobile phone working properly again?

via Gizmodo