Calls to Android phones can be blocked using the free third-party application Mr. Number. Most smartphones have some sort of built-in blocking capability, but because feature sets and setup methods vary greatly from phone to phone, using a third-party app ensures familiarity no matter what phone you're using.Continue Reading
On your Android smartphone, open the Play Store app and search for Mr. Number. Tap the first item that appears on the search results list. Tap the Install button, then tap Accept to begin the installation process.
After the installation process completes, tap the Open button to open the app. You can also tap the Mr. Number icon on your home screen to open it.
Scroll through the list of callers and texters Mr. Number provides. When you find one you want to block, tap on the three dots beside the entry and a menu appears. Select either Mark as spam or Block number to add the number to the Hang Up list. Blocked numbers are automatically hung up on should they try to call you.