If you got the newest update from Verizon you can now use voice over LTE for HD video/voice calls. You need to go to your My Verizon account and add it. Its free of charge(I'm on unlimited and added with no issue) and after you add it reset your phone and it appears under mobile network as a option to turn off and on. I did it last night but haven't placed any calls yet. Let me know what you think.