If you’ve already created a custom voicemail on your iPhone, you can tap Play to see how your voicemail sounds. If you’re interested in creating a new message, tap the Custom button. From here, you can start recording your message by tapping Record and tapping Stop whenever you’re finished. Once you’re finished recording, tap on Play to make sure the message comes across as you’d like and hit Save (in the upper right) to save it as your voicemail.
Your iPhone does have a voicemail password, but you only have to enter it once and many new iPhones set it up automatically. However, there still needs to be some form of authentication between your carrier and your iPhone to download your voicemails. Even though you don’t see it, your voicemail password still exists.

Alright let me try to clear this problem as much as I can. From the parent carrier, we have a limitation or you can say a requirement that all numbers should have the Voicemail set up. So what we do for those customers who don’t want it, we disable it from our side but again the numbers keep syncing from the parent carrier’s network from time to time (roughly once a quarter). When the numbers get synced, voicemail automatically gets enabled. To some people, this is alright but sometimes it becomes inconvenience for the customers to call us again to disable it.
5.) Benvenuti alla mailbox personale di Dirk Schuster, dell’azienda John Doe. Si prega di lasciare un messaggio con il vostro numero di telefono dopo il segnale. Sarete richiamati al più presto possibile. Per richieste urgenti, si prega di inviare una e-mail a: [email protected]. Grazie per la vostra chiamata.