Note: If you unfortunately forgot your voicemail password, change your voicemail password will not work, you have to reset it. You should contact your carrier or check its website and see if they offer an option to reset the password online.
Call 800-244-1111, and a representative will verify your identity and reset your PIN for you.

Open the Phone app . Press and hold “1” to call your voicemail. Enter your PIN and press “#”. Press “*” for the menu. Press “4” to change settings. Press “1” to change your greeting. Follow the recorded instructions. How do I change my voicemail message? From the Home screen, tap the Phone icon . Tap Voicemail then tap Greeting (upper-left). Greeting is located in the top-left corner of screen. Tap Custom to record a greeting. Enabled when a checkmark is present. Tap Record to begin recording the custom greeting message. Tap Stop to end recording then tap Save. Call *86 (*VM) from the handset or the 10-digit mobile number from another phone. Follow the instructions for choosing the language options then press the # key to confirm the choice. When prompted, enter the 4-7digit password then press the # key. When prompted, say the signature (or name) then press the # key. Open your Android’s Phone app. It usually looks like a phone receiver at the bottom of the home screen. Press and hold the 1 key on the keypad. Tap Add number. Tap Service. Tap My carrier. Tap Setup. Tap Voicemail number. Type your mobile phone number and tap OK.
Start your phone up and launch the Phone app. Turn on your phone and tap the Phone app. ...Access your additional phone options. In the top-right corner of the screen, tap the More Options button (the three vertical dots), and then tap Settings.Choose to adjust your call settings. Next, tap Calls in the menu that appears.