koganmobile.co.nz just launched in NZ today
Their launch special says:
30 Day Prepay Mobile Plan
Unlimited standard calls & texts*
+32GB2
$4.90# $69.90
For the first 30 Days
*All to use within NZ. #Offer ends 11:59pm NZST 30/09/2019 unless sold out prior. T&Cs apply.
Click for details. https://www.koganmobile.co.nz/#terms
looks like they run as an MVNO over the Vodafone network
prices actually look cheaper than the current prepay market for some of their bundles
I'd probably go with Skinny. Prices seem to be on par with Skinny (eg data and price bump vs the $16 plan, slightly less data on the $33 plan vs the $36 plan, $70 vs 77 for 32GB of data vs 40GB+) but Skinny has rollover data.
Could be good if you need a one off blast of data, then cancel the 32GB plan.