As part of a $105 million federal and state settlement, AT&T Mobility LLC will pay $80 million to the FTC to provide refunds to consumers.

According to the FTC and other agencies, AT&T unlawfully billed mobile phone users for unauthorized third-party charges for things like ringtone subscriptions and horoscopes. The FTC’s complaint alleges that AT&T kept at least 35 percent of those charges.

People who believe that AT&T charged them without authorization can visit ftc.gov/att to submit a refund claim.