I keep getting notifications about every half hour that Verizon's Visual Voicemail is unable to establish a connection. Then it tells me that it is likely only temporary and to check back later. Is there a problem? How often does it check? I have not gotten any voicemails, so I don't know whether it is actually working. Edit: it also tells me it can't sync. I had to turn wifi off, but even then it gave these same messages.