Warning to all, Samsung Note 10+ Unlocked versions do not support Voice over LTE features. They do not inform you of this before purchase, but after 3 months of trying to get my Wi-Fi Calling and HD voice working, it was told that these features are not supported on unlocked phones. So, if you want a Note 10+ please purchase a Carrier version of it so that all your features will function correctly. I know a lot of you out there are still trying to get your Voice over LTE features working with the carriers, and I wish you all the best, but Samsung officially does not support it on unlocked phones, and they need to inform everyone of it.
It is supported by Samsung and the Note 10+. The carrier must enable this feature. Some carriers have enabled this feature on some unlocked models but not all. If you want VoLTE operating on your unlocked device, pester your carrier.