How do I get a anti theft code for a used radio I bought on Ebay?

To obtain the anti-theft code for a used radio, first check the user manual, as it often includes the code. If you don’t have the manual, try contacting the manufacturer with the radio's serial number; they may provide the code. Additionally, some online forums or websites specialize in retrieving radio codes—just ensure they are reputable. Lastly, if all else fails, consider taking the radio to a professional car audio shop for assistance.