Patch Bowen12:08, Jul 15 2021 Kate Torline/Unsplash According to data from a Tefficient study, New Zealand has the third most expensive movile data in the world. (File photo) This article was first published at thebit.nz OPINION: New Zealand’s mobile data is the third most expensive in the world. This is according to data from a Tefficient study that analysed mobile data usage and costs from 44 developed countries from all regions of the world. The study shows that New Zealand’s mobile data is the third most expensive in the world (per gigabyte) with Belgium and Canada being the only countries where data is more expensive.