Typically, your carrier’s voicemail system guides you through the process of listening to and managing your voicemail. The first time you call your voicemail, it also guides you through the process of recording greetings, setting a password, etc.
From the Home screen, tap the Phone icon (in the QuickTap bar).
Tap the Voicemail Key (on the dialpad) to dial your voice mailbox.
Follow the setup tutorial.
Enter a password.
Record a voice signature and greetings for your voice mailbox.