Cynthia has an iPhone and loves the visual voicemail feature, but her deaf friend doesn't have it and could use it. Leo says she should check with her carrier and see if they offer visual voicemail as an extra charge. The other option is to sign her up for Google Voice. It's free and it will give her transcriptions of voicemails. It won't be perfect, but it will be close enough to get the point.
Tim's wife has an iPhone 6s Plus and her voicemail messages have disappeared! AT&T's visual voicemail expires after awhile and they will delete them after 60 days. AT&T probably has a copy somewhere, but Tim says they are no help at all. For future reference, there are programs that can get voicemails off the phone. They should check out eCamm's PhoneView for the Mac. It's free to try, and $30 to buy. It'll move all of her messages, SMS, and more. It may also be able to recover deleted messages from the iPhone.
Peter has more than one cellphone running in Verizon and wants to swap out SIMs to use one number. But he has to use a special SIM in order to get LTE in it. Leo says that may be due to the update that runs VOLTE. But when it takes the SIM out and moves it to the iPhone, he loses visual voicemail. Leo says that's likely a Verizon shortcoming, even though Leo doesn't think there's a technical reason.
Tom's iPhone 6 Plus keeps asking for his voicemail password. Is that a new feature in iOS 8? Leo says no. It's probably what the carrier is requiring. If he can't remember it, Leo advises calling up AT&T to have them reset it. And if he uses second factor authentication, it'll protect him from someone hacking his voicemail.
Maryanne recently bought a Samsung Galaxy S4 and she's missing the visual voice mail alerts. Leo says that may be due to a carrier restriction and may need to be set up with them.
Absent that, Maryanne should go into visual voicemail settings and look for the "display notifications" option. But there isn't a feature to have the phone jump up and grab her attention. One workaround is Google Voice. It will enable her to have a phone message follow her from phone to phone.