Tap Change Voicemail Password. Enter the new password (4-6 digits) then tap Done. If requested, enter the current password. Re-enter the new password, then tap Done. If that doesn’t work, contact your phone carrier to change your passcode or PIN. Or if your phone carrier has an account app (like Verizon’s My Verizon App), you can update
To pick the check box next to ‘Mark Default Greeting,’ tap the check box to the right of the check box.

Android phones can access voicemail by holding down the 1 key on the dial pad until the phone dials your 10-digit phone number. You will automatically connect to your mailbox and be prompted to enter your temporary password; this password is the last 4 digits of your phone number followed by the # key. Start the Google Voice app. Tap the three horizontal lines at the top left of the screen (sometimes called a hamburger menu), and then tap “Settings.” In the Voicemail section, tap “Voicemail greeting.” Tap “Record a greeting.” How do I access my voicemail? To call your voicemail on an Android phone, simply open your phone’s dial pad and hold your finger down on the “1” key. You can also call your voicemail from a different phone by calling your own number and tapping the pound key. How do you check your voicemail?
To turn your iPhone off, press and hold the power button until you see the red power icon and slide to power off appear on the display of your iPhone. Using your finger, slide the red power icon from left to right. Wait about 30 seconds before turning your iPhone back on, just to make sure it completely shuts down.