The Telephone Consumer Protection Act makes it illegal for anyone to robocall your cell phone with your prior expressed written consent. Debt collectors often time use robodialers to call you to attempt to collect a debt because it allows their collectors to be on the phone with debtors instead of sitting there waiting for the phone to ring to see if anyone answers. The more the collectors are actually on the phone talking to debtors the more they are going to collect. Under the TCPA you are entitled to a minimum of $500 per unwanted call, up to $1,500 per unwanted call if you can prove that the violation with willfull and intentional.