Just purchased a Verizon HTC One (M8) and it has said it is voice roaming since I turned it on. Data roaming is the only roaming option I could find, and it has always been disabled. VZ Tech support just says it is a new feature letting me know when I'm not on a VZ tower, and to ignore it, but it never goes away, and leaves the ongoing notification. Data has been LTE and 3G with no problems. The notification dropdown also says "preferred network" not "Verizon Wireless."