From the home screen, swipe to and then tap Play Store. Note: Alternately, you can set up voicemail by tapping the Phone icon, then pressing and holding the number 1 key. If prompted, enter your voicemail password, then follow the prompts to set up your voicemail.
Tap the Search icon.
Enter at&t visual voicemail.
Tap the Search icon.
Tap AT&T Visual Voicemail.
Tap INSTALL.
Tap ACCEPT.
Tap OPEN.
Tap Call Voicemail.
Voicemail will be connected. When prompted, enter the account password, then tap End call.