I don't know since when but we are still missing the toggle VOIP ON/OFF option on the Xbox build. You have to constantly hold down the D-Pad to be able to communicate with other players. This feature is working fine on Playstation since release of the DayZ but for some reason it's non-existent on Xbox. It's a crucial feature for almost any type of interactions, especially for RP and PVP type situations. Please add this feature with the next update, we really need it.
Thanks!