Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to stop telemarketing calls [title] Sign up for the national do not call registry. [step] Taking advantage of this free service can help you reduce the number of unwanted telemarketing phone calls you receive on both your landline and your cell phone. You can sign up for the service online at donotcall. Gov, or by calling the federal trade commission.

Ending1: [substeps] You must download the settings application for your phone to qualify for the national do not call registry. The program is entirely free and easy to use. Ending2: The rfid (call-on feature) function is also free on most social networking platforms. [substeps] To sign up, you must first get on the phone and enter your personal information including your name, phone number, and email address. Ending3: [substeps] Telemarketers are supposed to stop calling your number within 31 days of your registration. This service will not prevent all unwanted calls. Ending4: [title] Call your state's national phone registry. [step] Your telephone company should have a digital inventory of the numbers for certain county phone registry locations in that area.

Answer format: ending1/ending2/ending3/ending4