From the phone keypad, press and hold the '1' key.
If you are an existing AT&T customer, your voicemail (including password) will transfer to your new phone. Note: If you have forgotten your voicemail password, you may not be able to access Voicemail until you reset your voicemail password.
If you're a new customer, follow the recorded prompts to create your password and greeting to complete voicemail setup. Note: View Access Voicemail for tips to manage voicemail. Go to Troubleshoot Voicemail for solutions to common voicemail problems.