Not sure what's going on with new ip7+ visual voicemail. It won't allow me to hear the messages as soon as you try to listen will just re flash back to voicemail and won't play. Called att and said to get new SIM card. Did that didn't work. Reset factory network settings-did not work. Reset voice mail password-did not work. Completely erase phone and re-restored-did not work. But when I put the sim card back on my old ip6+ it works perfectly fine. Any thoughts? Could it be the phone itself?