New MVNO for New Zealand
 

The Warehouse chain in NZ is now offering a prepaid deal via a MVNO arrangement with 2 degrees Mobile
very good rates but a credit expiry of only 31 days
They also have budget phones available but are SIM locked as is common on NZ on lower priced handsets normally 9 - 12 months then free to unlock

https://warehousemobile.co.nz/

:):)