After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.
Welcome to iMore! Go set up voicemail on your iPhone, open the Phone app, then click on "Voicemail" in the lower right corner of the screen. It will guide you through the process at that point. If you're still having issues it's probably an issue with your carrier so you'll want to contact them.