The attorney general of Massachusetts, Maura Healey, has launched an investigation into the recent T-Mobile data breach to determine whether the company had proper safeguards in place.

According to T-Mobile, personally-identifying information of at least 13.1 million current customers and 40 million former and prospective customers was compromised after its computer network was breached in July. 

Breached information included names, drivers’ license information, Social Security numbers, addresses, dates of birth, and government identification numbers. For some consumers, T-Mobile prepaid pins, phone numbers, International Mobile Equipment Identity (IMEI) numbers, and International Mobile Subscriber Identity (IMSI) numbers were also illegally accessed.

Subsequently, the AG’s Office has launched an investigation into the breach and the steps the company is taking to address it and notify consumers, and to determine whether the company had proper safeguards in place to protect mobile device information and consumer information. 

“My office is extremely concerned about how this data breach may have put the personal information of Massachusetts consumers at risk,” said AG Healey. “As we investigate to understand the full extent of what’s happened, we urge impacted consumers to take the necessary precautions to ensure their information is safe, and to prevent identity 

and fraud.”

In response to the breach, T-Mobile is offering consumers various free theft protection services, including scam and account take-over protection for their cell phones.