Voicemail suddenly not working
My voicemail on my iphone has been fine a few months ago and then randomly my Dad says when he calls it says “caller unavailable” and doesn’t let the caller leave a message. This happened completely out of the blue and I have not changed phones or done anything new. I’ve tried deleting my old voicemails to clear up space but the issue has persisted so I’m not sure what to do. My visual voicemail is set up and i’ve even called my own number and tried to set it up manually. Nothing worked. If anyone could help that would be great.