Once you have your new iPhone in hand and you are learning how to use it, one of the first things you may want to do is record a voicemail greeting. You have the option of using a default one that tells the person what number they have called, but you may elect for a more personal option.
Part 1. How to Change and Record Voicemail Greetings on iPhone Setting a voicemail greeting is important when we missed a call and let the people calling you know they have reached out to the right person and remind them to leave a message after the greeting. To record a personalized voicemail greeting, here are the steps that you have to follow.

You can change your voicemail password from your iPhone by calling (800)-922-0204. You’ll reach an automated customer service menu which will allow you to change your voicemail password. To learn more, check out Verizon’s support article on the topic.
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?