Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to deal with abusive phone calls [title] Block phone numbers from abusive callers. [step] Most phone companies allow you to block a limited amount of numbers. These blocks may expire, however, so it's important to keep the list updated if you receive abusive phone calls after the block has expired.

Ending1: [substeps] Call your phone provider to find out the number. There are two kinds of blocked numbers: blank and unblocked. Ending2: Ask for the phone number of the abusive call to be blocked, either temporarily or permanently. [substeps] Keep in mind that calling a landline is free to all users at any time. Ending3: [substeps] Many phone companies allow you to block up to five numbers for free. These blocks usually expire after three months. Ending4: [substeps] In addition to blocking numbers, many companies offer protection services for their phone system. You can keep the list updated by contacting the company and setting up a password of your choosing.

Answer format: ending1/ending2/ending3/ending4