This may be of interest if you are a low user.
Warehouse mobile seems to be the best deal at the moment.
They use the 2D network so if you have 2D coverage and a low user look at them.
They now offer free calling and texting between warehouse mobile customers.
My wife has just signed up so my daughter can now call her for free.
They will each spend about $5 a month I reckon.
Calls/Texts must be made within NZ.
Warehouse mobile now allow a $10 top-up to last 90 days so the minimum spend is $3.35 a month.
Causal texts 2c each
casual talk 4c/min
casual data 6c/MB
Value packs available (eg unlimited texts $4/month)