An investigation by the Minnesota Commerce Department already found that Frontier's network has "frequent and lengthy" phone and Internet outages, that Frontier has failed to provide refunds or bill credits to customers even when outages lasted for months, that Frontier is guilty of frequent billing errors that caused customers to pay for services they didn't order, and that it has failed to promptly provide telephone service to all customers who request it.

Frontier letting its phone network fall apart, state investigation finds

The Minnesota Attorney General's office is investigating whether Frontier violated state consumer-protection laws, and the state's two US senators asked Pai to have the FCC investigate as well.

"For a chairman who is so concerned with rooting out waste, fraud and abuse, it's baffling that the commission tasked with overseeing billions of dollars in public money is declining to investigate the more than a thousand allegations of poor service by a company that receives that public money to provide those services," US Sen. Tina Smith (D-Minn.) told Ars in a statement today.

Smith and Sen. Amy Klobuchar's (D-Minn.) letter to Pai in March asked him to investigate "whether the company [Frontier] is in compliance with CAF funding requirements as designated by the agency."

The senators' letter noted that "Frontier has received more than $100 million in federal funding over the last four years to improve broadband services in rural Minnesota," and that the state investigation found that "Frontier may be underinvesting in its service areas for which it received federal subsidies to build out its broadband network."

The text above is a summary, you can read full article here.