T-Mobile has confirmed to Android Police that it has closed a data breach operation that may have harvested a small group of customers’ phone numbers, number of lines per account and call diagnostics. Customers who may have been affected were notified via text message yesterday and told that the event took place in November.

The company tells us that hackers did not have access to any names associated with the account, financial data, credit card information, social security number, passwords, PINs or physical or email addresses.

While most of the worrying things are excluded here, these call diagnostic calculations ̵

1; customer-specific network information as defined by the FCC – may include call location data such as tower ID and even detailed information from your device.

By and large, however, it seems that the scale of impact both in terms of severity and range is relatively minimal this time – there are many tobit attacks like this that we are not allowed to report on – but T -Mobile has proven to be a frequent victim as it has been hit by at least one major attack each year. In fact, it was another hit in March.

That said, getting to all the affected people can be a time-consuming task: A subscriber said yesterday that they were only notified by T-Mobile of a potential compromise that occurred 9 months ago.