I was on an iPhone 4S for the past 3 years (had a 2 year contract) with AT&T. A few days ago I upgraded to the iPhone 5S with a 2 year contract with AT&T and the same phone number as before. I tried calling my phone, and I noticed my voicemail greeting has been erased. Also, the iPhone 5S isn't showing any visual voicemails anymore, and it is asking for my voicemail password. Is your entire voicemail setup supposed to be wiped out when you start a new 2 year contract with AT&T and the same phone number? I haven't restored my 4S backup onto the 5S yet -will I get all my old voicemails when I do that?