Their testing phase will last, God knows until when. My cousin is using a Smart 7 phone, and on that phone, Zong VoLTE is working. I have never seen anyone else using Zong VoLTE. If you call them for activation, they will register a complaint regarding it, and the next day, someone will call you just to inform you that the service is in the pilot phase, and soon all Zong users will be able to use it.Any zong employe here ..any update about zong VOLTE when will lunch commercially in Pak