(Bloomberg) -- U.S. Federal Communications Commission Chairman Ajit Pai criticized “slow progress” in restoring wireless service in areas hard hit by Hurricane Michael, and ordered an investigation into the effort.

The storm slammed into the Florida panhandle on Oct. 10, devastating towns like Mexico Beach and Panama City Beach. As of late Monday, 65 percent of cell sites in surrounding Bay County weren’t working, according to the FCC.

“The slow progress in restoring wireless service in areas close to where the hurricane made landfall is completely unacceptable,” Pai said in an emailed statement. “While the FCC has been in regular contact with companies serving the affected areas, I’m concerned that their actions on the ground aren’t matching the urgency that we have conveyed.”

Pai said he was joining Florida Governor Rick Scott in calling on wireless carriers to waive the bills of Floridians in affected areas for October, and to allow them to change carriers without penalty.

Verizon Communications Inc. earlier Tuesday said it had deployed two new cell sites overnight, planned to put another in service during the day, and was providing coverage from an aerial cell site. AT&T Inc. in a Monday post said that its networks “are nearly fully restored in most affected areas,” and that it had deployed portable cell sites “in numerous locations throughout Florida and Georgia.”

--With assistance from Scott Moritz.

To contact the reporter on this story: Todd Shields in Washington at tshields3@bloomberg.net

To contact the editors responsible for this story: Jon Morgan at jmorgan97@bloomberg.net, Elizabeth Wasserman

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