Cheap prepay phone plan in New Zealand

For the past 15 years, I've been using this prepay phone plan. I switch between the $10 per month plan and the $19 plan depending on my data needs and requirements. I'll explain both and how you switch between the two (you can cancel one at the end of your month and switch to the other).
When I was in Australia, the cheapest plan I could find was $30 per month, but thankfully in New Zealand, you can get $10 plans that provide you with enough phone minutes and text messages for you to apply for jobs or call motels and holiday parks you're planning to staying in.
About me:
I'm a Kiwi travelling around New Zealand in my used caravan, making informative videos about the campsites I've visited. The reviews are about DOC campsites, freedom parks, campgrounds and holiday parks.
My vlog is for camping tourists (both international and New Zealanders) who are travelling in caravans, RVs, vans, buses and motorhomes, who want to see the facilities campsites have in advance of staying. I discuss what I liked and disliked about each park, so you know what to expect.
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This channel is not monetised. If the videos are helpful, please consider giving US $3 via Buy Me A Coffee: www.buymeacoffee.com/caravanlifenz
Thanks for watching!