I have an iPhone 4, and for the last month or so I have had this red dot on the phone app. I've rang up voicemail several times and there are no messages - I've deleted any saved voicemails and I've left myself a voicemail from another phone and deleted it; dot is still there. I did a factory reset a few hours ago and the notification went away, only to return minutes later, so I restored from back-up to get all my stuff back. What else can I do to remove the red dot? It doesn't really bother me but it would be nice for it to go away. My network is Three (UK) if that helps.