If you want to stop a number from leaving voicemail on your Android device, there are a few simple steps you can take. First, open the voicemail app and tap the number you want to block. Next, select “Options” from the menu on the left side of the screen. From here, you’ll be able to select “Blocking Numbers.” To add a number to your list of blocked numbers, simply tap on it and hit “Add.” You can also remove numbers from your list by selecting them and hitting “Remove.” ..