Change Caller ID for Outgoing Calls Android phones have three options for changing the ID people see on their phones when you call them.

You can block or unblock a number on an Android phone using the built-in Phone app's "Blocked numbers" menu.

On Android Phones To block a recent number, open your device's default Phone app and tap on the recent calls list---it's the little clock in the top-middle of the screen.

Google caller ID, spam protection for Android users launched; here's how it works To use Google caller ID and spam protection, your phone may need to send information about your calls to Google.