Could you be very specific as to which 2G frequencies are still in operation. For example is the 900 GSM still in operation for voice ?
Also do we have voice over data for the 700MHz 4G LTE in New Zealand yet ? or is it just data ?
I find the lack of real in depth specifications on the network a bit of a problem. I am in a Rural location and have to use Apps like Open Signal and Network Cell Info Lite to try and workout whats being received.