In the B2B world at least, phone remains customers' preferred way to get more info prior to a sale and to get support afterwards. The same for B2C - at least on the support end of things, and provided you can readily talk to a human.
Also, analog phone calls are dead. But voice conversations are here to stay IMHO. There are plenty of "non-phone" alternatives to do those, e.g. Skype or using /call in Slack to sort out in 3-5 min what would take 15+ min to sort out in writing using texts or chats. Voice is just faster.