If you were a subscriber of T-Mobile or AT&T’s network in the last five years, then you might be entitled to receive some money from them.

Earlier this month, T-Mobile settled its case with FCC on “mobile cramming” by agreeing to pay $90 million, including to customers who were wrongly charged by the Magenta carrier. AT&T had agreed to pay $105 million on the same issue back in October. While some of the money will be kept by FCC, the rest of the amount will be used by AT&T and T-Mobile to refund customers who they had charged fraudulently.

“Those carriers have been profiting from those false, fraudulent fees to the tune of 30 to 40 cents of every dollar, and that is not only wrong, it’s illegal, and it should produce refunds for consumers, but it won’t automatically do so,” said U.S. Senator Richard Blumenthal, one of the members of the Senate committee who investigated into the matter, at a press conference on Monday afternoon.

To find out if you are eligible for a refund or not, head over to this website if you are an AT&T customer, or to this page if you are a T-Mobile customer to apply for a refund. While AT&T customers will only need to provide their phone number and other relevant details, T-Mobile customers will have to work a bit harder for their refund. They will first have to request their account summary for the last five years, mark the unauthorized charges, and then scan and send it over to T-Mobile to initiate the refund process.

AT&T customers have until May 1, 2015 to apply for a refund, while T-Mobile customers are only eligible to apply for a refund by April 30, 2015.

Sprint customers will also soon be able to request a refund for the unauthorized charges on their account as the FCC has already imposed a similar fine on the carrier.