This is a test of commonsense. Complete the next sentence:

How to get rid of unwanted calls on your cell phone
Download call blocking apps in the play store.
Android users have a number of tools they can access to get rid of unwanted calls in the form of apps, including :
Call filter, a very popular call blocking app that is also free. Droidblock, another android app that can get rid of unwanted calls and is also free.
Keep in mind success with call-blocking apps tend to vary and they are not always 100% effective. Have spam calls sent directly to voicemail.