Change your greeting: Tap Voicemail, then tap Greeting.Change your voicemail password: Go to Settings > Phone > Change Voicemail Password, then enter the new password. Change the alert for new voicemail: Go to Settings > Sounds & Haptics or Settings > Sounds.
If you don't record a new greeting, callers hear the default greeting. To record a new greeting: Open the Google Voice app . At the top left, tap Menu Settings. In the Voicemail section, tap Voicemail greeting. Tap Record a greeting. Tap Record . Record your greeting and when you’re done, tap Stop . Choose what you want to do with the recording:

To change your voicemail message on iPhone: 1. On your home screen, tap Phone. 2. At the bottom, tap Voicemail on the menu bar. 3. Tap Greeting in the top left corner of your screen. 4. Tap Custom if you want to record a custom greeting. 5. To record a new greeting, tap Record. Tap Play to listen to it. 6. Lastly, tap Save in the top right corner.
Retrieving voicemail messages. Users can listen to voicemail messages by accessing Nextiva Voice mailbox from a Nextiva phone or external phone. If calling from the primary phone, dial *86, otherwise if calling from any external phone, dial the phone number and press the * key during the voicemail greeting.