AT&T: iPhone displays 'Inbox is full' when checking Visual Voicemail
Learn how to resolve the "Inbox is full" message that may appear on your iPhone when you attempt to check voicemail.
To resolve the "Inbox is full" issue, verify that you are deleting messages saved on the AT&T voicemail server instead of those saved on your iPhone. You can do this using one of the following steps:
- Listen to and delete the recent voicemail messages on your iPhone.
- Call your AT&T voicemail by pressing and holding 1 or by dialing your own phone number, then listen to and delete the messages directly from the AT&T voicemail server.